IPAC2015 - List of Keywords (software)

Paper	Title	Other Keywords	Page
MOPWA033	Yacs - A New 2.5D FEM Eigenmode Solver for Axisymmetric RF-Structures	cavity, multipole, dipole, quadrupole	175
	B.D. Isbarn, B. Riemann, M. Sommer, T. Weis DELTA, Dortmund, Germany
	Funding: Work supported by the BMBF under contract no. 05K13PEB Most feasibility studies for modern accelerator concepts, including superconducting multicell RF-cavity-resonators in circular accelerators, depend on computing a large number of eigenmode frequencies and field patterns to obtain typical figures of merit. This task includes computational intensive numerical studies. To obtain the full eigenfrequency spectra most of these studies are performed in 3D, require a great amount of computation resources and thus are limited to a few hundred or thousand eigenmodes. To overcome this issue, some codes make use of the axisymmetric geometry of most of the RF-cavity-resonator structures and solve the problem in 2D. Solving in 2D however reduces the eigenmode spectra to eigenmodes with no azimuthal dependencies (so called monopole-modes). Due to the lack of freely available and easy to use 2.5D eigenmode solvers which are able to solve for the full 3D field in a reduced 2.5 dimensional problem, we developed yet another cavity solver (Yacs), a simple FEM based solver capable of solving for the full 3D eigenmodes of axisymmetric problems while only requiring a fraction of the computation resources required by most modern 3D codes.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA033
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MOPWA069	Upgrades on a Scalable Software Package for Large Scale Beam Dynamic Simulations	simulation, DTL, space-charge, solenoid	282
	X.T. Dong, K. Du, J. Xu, R. Zhao IS, Beijing, People's Republic of China Y. He, Z.J. Wang IMP/CAS, Lanzhou, People's Republic of China C. Li, Q. Qin, Y.L. Zhao IHEP, Beijing, People's Republic of China
	Large-scale particle tracking is important for precise design and optimization of the linear accelerator. In this paper a parallel software recently developed for beam dynamics simulation has been benchmarked. The software is based on Particle-In-Cell method, and calculates space charge field by an efficient three-dimension parallel fast Fourier transform method. It uses domain decomposition and MPI library for parallelization. The characteristics of this software are optimized software structure and suitable for modern supercomputers. Several standard accelerating devices have been used to compare the simulation results with other beam dynamics software. They have been run on several different platforms, such as INSPUR cluster at RDCPS, and SHENGTENG7000 at IMPCAS. At first, some simulation results for RFQ with large number of particles will be shown.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA069
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MOPJE056	OMC Software Improvements in 2014	optics, GUI, simulation, operation	426
	J.M. Coello de Portugal, F.S. Carlier, A. Langner, T. Persson, P.K. Skowroński, R. Tomás CERN, Geneva, Switzerland
	We present the LHC Optics Measurement and Corrections (OMC) software developments done during 2014 on stability, performance and usability. This software is used to analyze turn-by-turn data and compute optics corrections to get the best performance of the LHC. The main developments have been an automatic local correction script to get faster and more accurate corrections in the interaction regions, a self contained test for the whole software package to avoid mistakes during the software development and the improvements in the software quality and efficiency of the Segment by Segment technique script. We also present a study of the code quality in its current status.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPJE056
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MOPMN009	Cross-platform and Cloud-based Access to Multiple Particle Accelerator Codes via Application Containers	Linux, simulation, radiation, FEL	720
	D.L. Bruhwiler, G. Andonian, M.A. Harrison, S. Seung RadiaBeam, Santa Monica, California, USA D.L. Bruhwiler, R. Nagler, S.D. Webb RadiaSoft LLC, Boulder, Colorado, USA P. Moeller Bivio Software Inc., Boulder, USA T.V. Shaftan BNL, Upton, Long Island, New York, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0006284. Particle accelerator and radiation modeling codes focus on specific problems, rely on complicated command-line interfaces, are sometimes limited to a small number of computing platforms, and can be difficult to install. There is also a growing need to use two or more codes together for end-to-end design or for complicated sub-systems. RadTrack is a lightweight cross-platform GUI for such codes, based on the Qt framework and PyQt bindings for Python. RadTrack is designed to support multiple codes, placing no burden on the corresponding development teams. Elegant and the Synchrotron Radiation Workshop (SRW) are supported now in a pre-beta stage, and support for GENESIS 1.3 is under development. These codes are being containerized via the open source Docker platform for use in the cloud. The open source Vagrant and Virtual Box are used for MacOS and Windows. We discuss RadTrack and our vision for cloud computing.
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MOPHA002	Operational Applications - a Software Framework Used for the Commissioning of the MedAustron Accelerator	framework, injection, operation, controls	773
	A. Wastl, M. Hager, M. Regodic EBG MedAustron, Wr. Neustadt, Austria
	MedAustron is a synchrotron-based cancer therapy and non-clinical research center located in Austria. Its accelerator is currently being commissioned prior to first medical treatment. During the tuning of the machine, many iterations of measurements involving several parameter changes are performed in order to optimize the accelerator’s performance. An operation and measurement software framework called 'Operational Application Framework' (OpApp) has been developed for this purpose. It follows a modular approach and provides basic methods like ‘write to file’ or ‘measure beam position monitor‘. By appropriately combining modules, OpApps performing automatized measurements and complex procedures can be created. A detailed description of the setup as well as examples of use are provided here.
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MOPHA048	Beam Optimization of the DAΦNE Beam Test Facility	diagnostics, linac, electron, detector	901
	L.G. Foggetta, B. Buonomo INFN/LNF, Frascati (Roma), Italy P. Valente INFN-Roma, Roma, Italy
	The DAΦNE Beam Test Facility delivers electron and positron beam with a wide spread of parameters in charge, energy, transverse dimensions and time width. Thanks to the recent improvements of the diagnostics, all the beam parameters have been measured and optimized. In particular we report here some results on beam transverse size, divergence, and position stability for different energy and intensity configurations. After the upgrade of the electronic gun of the DAΦNE LINAC, the pulse time width and charge distribution have been also characterized.
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MOPTY006	Study on the Injection Beam Commissioning Software for CSNS/RCS	injection, controls, interface, linac	950
	M.Y. Huang, L. Huang, W.B. Liu, J. Qiu, S. Wang IHEP, Beijing, People's Republic of China
	Funding: Funding Agency: Work supported by National Natural Science Foundation of China (11205185, 11175020, 11175193 ) The China Spallation Neutron Source (CSNS) accelerator uses H⁻ stripping and phase space painting method of filling large ring acceptance with the linac beam of small emittance. The beam commissioning software system is the key part of CSNS accelerator. The injection beam commissioning software for CSNS contains three parts currently: painting curve control, injection beam control and injection orbit correction. The injection beam control contains two subsections: single bunch beam calculation and LRBT beam control at the foil. The injection orbit correction also contains two subsections: injection orbit correction by the calculation and injection trim power control.
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MOPTY039	Compact Single Pass BPM	controls, FPGA, instrumentation, pick-up	1013
	M. Žnidarčič, M. Cargnelutti, E. Janezic I-Tech, Solkan, Slovenia
	Monitoring and subsequent optimization of linacs and beam transfers requires specific instrumentation for beam position data acquisition and processing. Compact single pass BPM is the newly developed prototype intended for position and charge monitoring in classical single-multi bunch operation linacs and transfer lines. Flexibility of the instrument enables the installation on electron and proton single pass machines. The motivation, processing principles and first results are presented.
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MOPTY044	Machine Protection Systems and their Impact on Beam Availability and Accelerator Reliability	operation, linac, storage-ring, proton	1029
	R. Andersson, E. Bargalló, A. Nordt ESS, Lund, Sweden E. Adli University of Oslo, Oslo, Norway
	Over the last decades, the complexity and performance levels of machine protection have developed. The level of reliability and availability analysis prior to operation differs between facilities, just as the pragmatic changes of the machine protection during operation. This paper studies the experience and development of machine protection for some of the state of the art proton and ion accelerators, and how it relates to reducing damage to and downtime of the machine. The findings are discussed and categorized, with emphasis on proton accelerators. The paper is concluded with some recommendations for a future high power linear proton accelerator.
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MOPTY050	Design, Development and Implementation of a Highly Dependable Magnet Powering Interlock System for ESS	PLC, power-supply, operation, hardware	1045
	M. Zaera-Sanz, S.L. Birch, A. Monera Martinez, A. Nordt ESS, Lund, Sweden
	Approximately 350 resistive magnets and 350 power supplies (PS) will be installed in the 600 m long linear accelerator (LINAC) at ESS, transporting the proton beam from the source to the target station. In order to protect this equipment from damage (e.g. due to overheating) and to take the appropriate actions required to minimise recovery time, a dedicated magnet powering interlock system is being designed. The magnet powering interlock system will safely switch off a PS upon the detection of an internal magnet or PS failure and inform the beam interlock system to inhibit further beam operation. The different failure modes and related mitigation techniques of magnets and their PS will be presented. Failures of the magnet cooling system can be detected for example by interlocking the opening of a thermo-switch or a flow-switch. To achieve the required level of dependability, an interlock system based on safety PLC technology, distributed safety PLC software programming tools, PROFINET fieldbus networking, and current loops for hardwired interlock signal exchanges, has been prototyped and will be discussed.
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MOPWI023	Development Plan for Physics Application Software for FRIB Driver Linac	linac, ion, EPICS, operation	1201
	M. Ikegami, G. Shen FRIB, East Lansing, Michigan, USA
	Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661. FRIB is a heavy ion linac facility presently under construction at Michigan State University, USA, and its driver linac accelerates CW beams of all stable ions up to uranium to the energy of 200 MeV/u with the beam power of 400 kW. We plan to start beam commissioning of the driver linac from December 2017. An adequate software environment and infrastructure is critical for our commissioning and operation. Recently, a middle layer based architecture, EPICS V4 based services for example, for physics application has been rapidly developed at other facilities like NSLS II. It has been showing its flexibility, and portability. After reviewing those recent developments, we decided to adopt these services as software infrastructure for FRIB driver linac commissioning. It enables us to take advantage of their cutting edge technologies and maturity as a system sustained by the experience accumulated in the commissioning of NSLS-II. In this paper, we present a plan to develop physics application software for FRIB driver linac based on EPICS V4 services and related software. We also present a plan to adjust these EPICS V4 related software to meet the FRIB specific requirements.
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MOPWI024	Accelerator Online Simulation Platform	database, simulation, lattice, space-charge	1204
	C.P. Chu, Y. Zhang FRIB, East Lansing, Michigan, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University. A platform for accelerator online beam simulation has been established for Facility for Rare Isotope Beams (FRIB). This modeling platform supports multiple simulation codes for different sections of the complex machine which cannot be properly modeled with a single online simulation tool. Model data for the platform is stored in a relational database which is designed to accommodate most simulation data. The stored data is accessible with physics intuitive data API (Application Programming Interface). Presently, the platform is supporting Open XAL, MAD-X and IMPACT simulation codes. In addition to the model data storage and access, tools such as data comparison and simple graphing capability are also included in the platform.
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MOPWI027	Open XAL Control Room Experience	controls, optics, operation, Windows	1214
	C.P. Chu, D.G. Maxwell, Y. Zhang FRIB, East Lansing, Michigan, USA C.K. Allen, T.A. Pelaia II, A.P. Shishlo ORNL, Oak Ridge, Tennessee, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy under Cooperative Agreement DE-SC0000661 and DE-AC05-00OR22725, the State of Michigan and Michigan State University. This paper reports the control room experience, lessons learned, and quick deployment approach for the Open XAL application environment. Open XAL is a java-based framework for building high-level accelerator applications, it is a major revision of the XAL framework which was developed at the Spallation Neutron Source (SNS). Open XAL is site neutral and may be deployed at multiple accelerator facilities. Currently, Open XAL is installed at SNS and at the Re-Accelerator facility of Michigan State University. At SNS we are in the final process of replacing the old XAL environment with Open XAL; we describe the upgrade process and our accelerator operations experience using Open XAL. At Michigan State, Open XAL has been tested during a cryomodule commissioning and result will be shown.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWI027
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MOPWI036	Investigation of Continuous Scan Methods for Rapid Data Acquisition	detector, data-acquisition, experiment, hardware	1243
	C.L. Li East China University of Science and Technology, Shanghai, People's Republic of China A.M. Kiss SLAC, Menlo Park, California, USA W.J. Zhang University of Saskatchewan, Saskatoon, Canada
	It is common practice to perform spatially resolved X ray data acquisition by automatically moving components to discrete locations and then measuring beam intensity with the system at rest. While effective, scanning in this manner can be time consuming, with motors needing to accelerate, move and decelerate at each location before recording data. Information between data points may be missed unless fine grid scans are performed, which accounts for a further increase of scan time. Recent advances in commercial hardware and software enables a continuous scan capability for a wide range of applications, which saves the start and end of step motors. To compare scanning performance, both step and continuous scan modes were examined using the SPEC command language with both commercial and in-house hardware. The advantages and limitations of each are discussed.
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MOPWI044	Beamline Insertions Manager at Jefferson Lab	hardware, EPICS, controls, operation	1253
	M.C. Johnson JLab, Newport News, Virginia, USA
	Funding: This manuscript has been authored by Jefferson Science Associates, LLC under Contract No. DE-AC05-06OR23177 with the U.S. Department of Energy. The beam viewer system at Jefferson Lab provides operators and beam physicists with qualitative and quantitative information on the transverse electron beam properties. There are over 140 beam viewers installed on the 12 GeV CEBAF accelerator. This paper describes an upgrade consisting of replacing the EPICS based system tasked with managing all viewers with a mixed system utilizing EPICS and high level software. Most devices, particularly the beam viewers, cannot be safely inserted into the beam line during high-current beam operations. Software is partly responsible for protecting the machine from untimely insertions. The multiplicity of beam-blocking and beam-vulnerable devices motivate us to try a data-driven approach. The beamline insertions application components are centrally managed and configured through an object-oriented software framework created for this purpose. A rules-based engine tracks the configuration and status of every device, along with the beam status of the machine segment containing the device. The application uses this information to decide on which device actions are allowed at any given time.
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MOPWI045	The CEBAF Element Database and Related Operational Software	database, hardware, controls, cavity	1256
	T. L. Larrieu, M.E. Joyce, M. Keesee, C.J. Slominski, R.J. Slominski, D.L. Turner JLab, Newport News, Virginia, USA
	Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177. The newly commissioned 12 GeV CEBAF accelerator relies on a flexible, scalable and comprehensive database to define the accelerator. This database delivers the configuration for CEBAF operational tools, including hardware checkout, the downloadable optics model, control screens, and much more. The presentation will describe the flexible design of the CEBAF Element Database (CED), its features and assorted use case examples.
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MOPWI047	Architectural Improvements and New Processing Tools for the Open XAL Online Model	cavity, simulation, hardware, coupling	1262
	C.K. Allen, T.A. Pelaia II ORNL, Oak Ridge, Tennessee, USA J.M. Freed University of South Carolina, Columbia, USA
	Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725. The Open XAL online model is the component of Open XAL* providing accelerator modeling dynamic synchronization to live hardware. Several significant architectural enhancements and feature additions have been made concerning the handling and processing of simulation data. The major structural change is the creation of a single class Trajectory<> that manages all simulation data. Another significant design change was the development of standard tools for processing simulation results. One may obtain machine parameters such as fixed orbit, phase advance, dispersion, etc., or beam-based calculations such as RMS size and centroid location simply by passing simulation results, i.e. a Trajectory<> object, to these computation tools. Finally, the ability to fully create composite modeling elements was implemented in the online model. Specifically, accelerator hardware can be modeled as a collection of constituent modeling elements. This sub-structure capability is extremely useful for modeling RF cavities consisting of coupled RF gaps coupled and drift spaces. We present an overview of the new architecture and how it is used when building applications. * http://xaldev.sourceforge.net/
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MOPWI048	Open XAL Build System	site, database, interface, controls	1265
	T.A. Pelaia II ORNL, Oak Ridge, Tennessee, USA
	Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725 Open XAL is an accelerator physics software platform developed in collaboration among several facilities around the world. The build system is implemented through Apache Ant build files and features zero configuration simplicity based on directory patterns. These directory patterns allow for correctly building the Open XAL environment including the core and site specific applications, services, extensions, plugins and resources. Options are available for deployment and custom application packaging. This paper describes the Open XAL build rules, options and workflows.
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MOPWI049	Open XAL Services Architecture	interface, framework, network, Linux	1267
	T.A. Pelaia II ORNL, Oak Ridge, Tennessee, USA
	Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725 Open XAL is an accelerator physics software platform developed in collaboration among several facilities around the world. It includes a powerful new services extension that allows for natural remote procedure calls. The high level services interface is based upon custom implementations of modern standard protocols such as JSON-RPC and WebSockets. This choice of modern protocols allows for flexibility such as seamless communication with web clients free of plugins plus rich object type support. The JSON parser was designed for convenient data type transformations with easy extensibility, high performance and low memory overhead. The Open XAL services architecture features a simple application programming interface, high performance, memory efficiency and thread safety.
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MOPWI050	Open XAL Status Report 2015	site, database, framework, status	1270
	T.A. Pelaia II, C.K. Allen, A.P. Shishlo, A.P. Zhukov ORNL, Oak Ridge, Tennessee, USA Y.-C. Chao, C. Gong, F.W. Jones, R. Newhouse TRIUMF, Vancouver, Canada P. Chu, D.G. Maxwell, Y. Zhang FRIB, East Lansing, Michigan, USA R. Fearn, L. Fernández, E. Laface, M. Muñoz ESS, Lund, Sweden J.M. Freed University of South Carolina, Columbia, USA P. Gillette, P. Laurent, G. Normand GANIL, Caen, France H.R. Hale University of Tennessee, Knoxville, USA Y. Li IHEP, Beijing, People's Republic of China I. List, M. Pavleski Cosylab, Ljubljana, Slovenia P. Scruggs East Tennessee State University, Johnson City, USA
	Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725 Open XAL is an accelerator physics software platform developed in collaboration among several facilities around the world. The Open XAL collaboration was formed in 2010 to port, improve and extend the successful XAL platform used at the Spallation Neutron Source for use in the broader accelerator community and to establish it as the standard platform for accelerator physics software. The site-independent core is complete, active applications have been ported, and now we are in the process of verification and transitioning to using Open XAL in production. This paper will present the current status and a roadmap for this project.
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TUPJE014	An X-Band Linac with Tunable Beam Energy	linac, electron, simulation, gun	1644
	L. Zhang, H.B. Chen, Y.-C. Du, Q.X. Jin, J. Shi, C.-X. Tang, P. Wang, Z. Zhang TUB, Beijing, People's Republic of China
	The low-energy X-band linac has a wide application in medical imaging. In this paper, an X-band linac is designed to produce beam energy between 0.5MeV and 1.5MeV, and the output beam energy is continuously adjustable within this range. Two sections of linacs are combined and powered by a single microwave source. During the experiment, we can tune the RF phase and amplitude of the second section of the linac, the electron beam can see either acceleration or deceleration, which tunes the output energy. This paper presented the production of the whole linac system, as well as the measurement of the continuously-adjustable beam energy.
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TUPMA054	High Level Application for First Turns Commissioning in NSLS-II Storage Ring	storage-ring, GUI, lattice, controls	1953
	S. Seletskiy, A. Blednykh, J. Choi, Y. Hidaka, B. Podobedov, G. Shen, L. Yang BNL, Upton, Long Island, New York, USA
	The typical problems occurring during commissioning of the first turns in the storage rings include shorted coils or reversed polarity of the magnets, cross-cabling of magnets power supplies and reversed polarity of BPMs. In this paper we describe a dedicated high level control application, which was created and utilized for commissioning of the first turns in NSLS-II storage ring.
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WEPMA002	The Beam Chopper Power Converter for MedAustron: Safety by Design and Development	hardware, kicker, controls, synchrotron	2741
	T. Stadlbauer, R. Filippini, X. German, F. Osmić, P. Urschütz EBG MedAustron, Wr. Neustadt, Austria M.J. Barnes, T. Kramer CERN, Geneva, Switzerland M. Beerwald, D. Dirksen Poynting GmbH, Dortmund, Germany
	MedAustron is the Austrian centre for hadron therapy and non-clinical research. The beam chopper system is an essential component for patient safety in specific hazardous situations as well as for beam delivery from the synchrotron to the irradiation rooms. This paper presents the results from the development phase and the commissioning of the MedAustron beam chopper system. Details will be given on the design, the risk management, the test and the verification of the chopper power converter (PKC).
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WEPMN031	Automated Quench Limit Test Procedure for Serial Production of XFEL RF Cavities	cavity, cryomodule, flattop, operation	2994
	K. Kasprzak, D. Konwisorz, K. Krzysik, S. Myalski, J. Świerbleski, K. Turaj, M. Wiencek, A. Zwozniak IFJ-PAN, Kraków, Poland D. Kostin, K.P. Przygoda DESY, Hamburg, Germany
	In the Accelerator Module Test Facility (AMTF) at DESY in Hamburg RF cavities and accelerating cryomodules are tested for the European X-ray Free Electron Laser (XFEL). Measurements are done by a team of physicists, engineers and technicians from The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences in Kraków, Poland, as a part of Polish in-kind contribution to the XFEL. The testing procedures providing information about maximum available gradient and heat loads measurement are performed for the high gradients (up to 31MV/m). During these tests the cavity deformation caused by the Lorentz force is compensated by piezo (fast) tuners. For this purpose automated high level software was developed. This paper describes a method used to tune automatically the cavities during the RF tests. It was validated with the XFEL cryomodules. This improvement was implemented into the testing software and it is successfully used for testing of serial production cavities.
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WEPTY058	Diagnostics for High Power CW Accelerators	diagnostics, operation, lattice, controls	3405
	S. Assadi Texas A&M University, College Station, Texas, USA
	Funding: Work is partially supported by grants from the State of Texas (ASE) & the Michelle foundation High power, continuous wave (cw) accelerators are proposed for applications such as Accelerator Driven Systems (ADS) for subcritical reactor strategies and heavy ion accelerators for the production of rare isotopes. Because of the high beam powers and high energy loss with beam interception of material, the beam diagnostic designs are necessarily shifting to non-intercepting, real-time feedback devices that can be fully integrated with the accelerator machine protection system (MPS) and operation control system including online models. Appropriate for these applications, three types of beam diagnostics (lanthanum bromide scintillation coincidence detectors, GaN neutron and gamma detectors, and beam position monitors) are presented.
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THPF001	Tomography of Horizontal Phase Space Distribution of a Slow Extracted Proton Beam in the MedAustron High Energy Beam Transfer Line	simulation, extraction, proton, synchrotron	3673
	A. Wastl ATI, Vienna, Austria M. Benedikt CERN, Geneva, Switzerland A. Garonna EBG MedAustron, Wr. Neustadt, Austria
	Funding: EBG MedAustron Marie Curie Strasse 5 A-2700 Wiener Neustadt www.medaustron.at MedAustron is a synchrotron based hadron therapy and research center in Wiener Neustadt, Austria, which currently is under commissioning for the first patient treatment. The High Energy Beam Transfer Line (HEBT) consists of mul- tiple functional modules amongst which the phase-shifter- stepper PSS* is the most important module located where the dispersion from the synchrotron is zero and upstream of the switching magnet to the first irradiation room. The PSS is used to control the beam size for the downstream modules and for this scope rotates the beam in horizontal phase space by adjusting the phase advance. This functionality is used in this study to measure beam profiles for multiple phase space angles which act as input for a tomographic reconstruction. Simulation and measurement results are presented. * M. Benedikt et al, A new concept for the control of a slow-extracted beam in a line with rotational optics, Nuclear Instruments and Methods in Physics Research Section A, Vol 430, Issues 2–3, 1999
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THPF076	Thermal and Structural Analysis of the 72.75 MHz LINCE RFQ	rfq, cavity, simulation, controls	3857
	A.K. Orduz, A. Berjillos, C. Bonțoiu, J.A. Dueñas, I. Martel University of Huelva, Huelva, Spain A. Garbayo AVS, Elgoibar, Spain
	Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA. The 72.75 MHz LINCE RFQ is designed to function at room temperature. Effective operation of the RFQ cavity requires efficient water cooling in order to dissipate significant resistive power non-uniformly distributed on the copper walls and vanes. This amounts to about 10 kWfor one 0.5m long RFQ section. Cylindrical cooling channels have been designed and optimized by varying their diameter and position in order to minimize the frequency shift generated by thermal displacements. The article reports results of power loss simulations coupled with electromagnetic modelling studies and their consequences on the RFQ performance in terms of resonant frequency and thermal deformations.
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Paper

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Other Keywords

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MOPWA033

Yacs - A New 2.5D FEM Eigenmode Solver for Axisymmetric RF-Structures

cavity, multipole, dipole, quadrupole

175

B.D. Isbarn, B. Riemann, M. Sommer, T. Weis
DELTA, Dortmund, Germany

Funding: Work supported by the BMBF under contract no. 05K13PEB
Most feasibility studies for modern accelerator concepts, including superconducting multicell RF-cavity-resonators in circular accelerators, depend on computing a large number of eigenmode frequencies and field patterns to obtain typical figures of merit. This task includes computational intensive numerical studies. To obtain the full eigenfrequency spectra most of these studies are performed in 3D, require a great amount of computation resources and thus are limited to a few hundred or thousand eigenmodes. To overcome this issue, some codes make use of the axisymmetric geometry of most of the RF-cavity-resonator structures and solve the problem in 2D. Solving in 2D however reduces the eigenmode spectra to eigenmodes with no azimuthal dependencies (so called monopole-modes). Due to the lack of freely available and easy to use 2.5D eigenmode solvers which are able to solve for the full 3D field in a reduced 2.5 dimensional problem, we developed yet another cavity solver (Yacs), a simple FEM based solver capable of solving for the full 3D eigenmodes of axisymmetric problems while only requiring a fraction of the computation resources required by most modern 3D codes.

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MOPWA069

Upgrades on a Scalable Software Package for Large Scale Beam Dynamic Simulations

simulation, DTL, space-charge, solenoid

282

X.T. Dong, K. Du, J. Xu, R. Zhao
IS, Beijing, People's Republic of China
Y. He, Z.J. Wang
IMP/CAS, Lanzhou, People's Republic of China
C. Li, Q. Qin, Y.L. Zhao
IHEP, Beijing, People's Republic of China

Large-scale particle tracking is important for precise design and optimization of the linear accelerator. In this paper a parallel software recently developed for beam dynamics simulation has been benchmarked. The software is based on Particle-In-Cell method, and calculates space charge field by an efficient three-dimension parallel fast Fourier transform method. It uses domain decomposition and MPI library for parallelization. The characteristics of this software are optimized software structure and suitable for modern supercomputers. Several standard accelerating devices have been used to compare the simulation results with other beam dynamics software. They have been run on several different platforms, such as INSPUR cluster at RDCPS, and SHENGTENG7000 at IMPCAS. At first, some simulation results for RFQ with large number of particles will be shown.

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MOPJE056

OMC Software Improvements in 2014

optics, GUI, simulation, operation

426

J.M. Coello de Portugal, F.S. Carlier, A. Langner, T. Persson, P.K. Skowroński, R. Tomás
CERN, Geneva, Switzerland

We present the LHC Optics Measurement and Corrections (OMC) software developments done during 2014 on stability, performance and usability. This software is used to analyze turn-by-turn data and compute optics corrections to get the best performance of the LHC. The main developments have been an automatic local correction script to get faster and more accurate corrections in the interaction regions, a self contained test for the whole software package to avoid mistakes during the software development and the improvements in the software quality and efficiency of the Segment by Segment technique script. We also present a study of the code quality in its current status.

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MOPMN009

Cross-platform and Cloud-based Access to Multiple Particle Accelerator Codes via Application Containers

Linux, simulation, radiation, FEL

720

D.L. Bruhwiler, G. Andonian, M.A. Harrison, S. Seung
RadiaBeam, Santa Monica, California, USA
D.L. Bruhwiler, R. Nagler, S.D. Webb
RadiaSoft LLC, Boulder, Colorado, USA
P. Moeller
Bivio Software Inc., Boulder, USA
T.V. Shaftan
BNL, Upton, Long Island, New York, USA

Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0006284.
Particle accelerator and radiation modeling codes focus on specific problems, rely on complicated command-line interfaces, are sometimes limited to a small number of computing platforms, and can be difficult to install. There is also a growing need to use two or more codes together for end-to-end design or for complicated sub-systems. RadTrack is a lightweight cross-platform GUI for such codes, based on the Qt framework and PyQt bindings for Python. RadTrack is designed to support multiple codes, placing no burden on the corresponding development teams. Elegant and the Synchrotron Radiation Workshop (SRW) are supported now in a pre-beta stage, and support for GENESIS 1.3 is under development. These codes are being containerized via the open source Docker platform for use in the cloud. The open source Vagrant and Virtual Box are used for MacOS and Windows. We discuss RadTrack and our vision for cloud computing.

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MOPHA002

Operational Applications - a Software Framework Used for the Commissioning of the MedAustron Accelerator

framework, injection, operation, controls

773

A. Wastl, M. Hager, M. Regodic
EBG MedAustron, Wr. Neustadt, Austria

MedAustron is a synchrotron-based cancer therapy and non-clinical research center located in Austria. Its accelerator is currently being commissioned prior to first medical treatment. During the tuning of the machine, many iterations of measurements involving several parameter changes are performed in order to optimize the accelerator’s performance. An operation and measurement software framework called 'Operational Application Framework' (OpApp) has been developed for this purpose. It follows a modular approach and provides basic methods like ‘write to file’ or ‘measure beam position monitor‘. By appropriately combining modules, OpApps performing automatized measurements and complex procedures can be created. A detailed description of the setup as well as examples of use are provided here.

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MOPHA048

Beam Optimization of the DAΦNE Beam Test Facility

diagnostics, linac, electron, detector

901

L.G. Foggetta, B. Buonomo
INFN/LNF, Frascati (Roma), Italy
P. Valente
INFN-Roma, Roma, Italy

The DAΦNE Beam Test Facility delivers electron and positron beam with a wide spread of parameters in charge, energy, transverse dimensions and time width. Thanks to the recent improvements of the diagnostics, all the beam parameters have been measured and optimized. In particular we report here some results on beam transverse size, divergence, and position stability for different energy and intensity configurations. After the upgrade of the electronic gun of the DAΦNE LINAC, the pulse time width and charge distribution have been also characterized.

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MOPTY006

Study on the Injection Beam Commissioning Software for CSNS/RCS

injection, controls, interface, linac

950

M.Y. Huang, L. Huang, W.B. Liu, J. Qiu, S. Wang
IHEP, Beijing, People's Republic of China

Funding: Funding Agency: Work supported by National Natural Science Foundation of China (11205185, 11175020, 11175193 )
The China Spallation Neutron Source (CSNS) accelerator uses H⁻ stripping and phase space painting method of filling large ring acceptance with the linac beam of small emittance. The beam commissioning software system is the key part of CSNS accelerator. The injection beam commissioning software for CSNS contains three parts currently: painting curve control, injection beam control and injection orbit correction. The injection beam control contains two subsections: single bunch beam calculation and LRBT beam control at the foil. The injection orbit correction also contains two subsections: injection orbit correction by the calculation and injection trim power control.

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MOPTY039

Compact Single Pass BPM

controls, FPGA, instrumentation, pick-up

1013

M. Žnidarčič, M. Cargnelutti, E. Janezic
I-Tech, Solkan, Slovenia

Monitoring and subsequent optimization of linacs and beam transfers requires specific instrumentation for beam position data acquisition and processing. Compact single pass BPM is the newly developed prototype intended for position and charge monitoring in classical single-multi bunch operation linacs and transfer lines. Flexibility of the instrument enables the installation on electron and proton single pass machines. The motivation, processing principles and first results are presented.

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MOPTY044

Machine Protection Systems and their Impact on Beam Availability and Accelerator Reliability

operation, linac, storage-ring, proton

1029

R. Andersson, E. Bargalló, A. Nordt
ESS, Lund, Sweden
E. Adli
University of Oslo, Oslo, Norway

Over the last decades, the complexity and performance levels of machine protection have developed. The level of reliability and availability analysis prior to operation differs between facilities, just as the pragmatic changes of the machine protection during operation. This paper studies the experience and development of machine protection for some of the state of the art proton and ion accelerators, and how it relates to reducing damage to and downtime of the machine. The findings are discussed and categorized, with emphasis on proton accelerators. The paper is concluded with some recommendations for a future high power linear proton accelerator.

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MOPTY050

Design, Development and Implementation of a Highly Dependable Magnet Powering Interlock System for ESS

PLC, power-supply, operation, hardware

1045

M. Zaera-Sanz, S.L. Birch, A. Monera Martinez, A. Nordt
ESS, Lund, Sweden

Approximately 350 resistive magnets and 350 power supplies (PS) will be installed in the 600 m long linear accelerator (LINAC) at ESS, transporting the proton beam from the source to the target station. In order to protect this equipment from damage (e.g. due to overheating) and to take the appropriate actions required to minimise recovery time, a dedicated magnet powering interlock system is being designed. The magnet powering interlock system will safely switch off a PS upon the detection of an internal magnet or PS failure and inform the beam interlock system to inhibit further beam operation. The different failure modes and related mitigation techniques of magnets and their PS will be presented. Failures of the magnet cooling system can be detected for example by interlocking the opening of a thermo-switch or a flow-switch. To achieve the required level of dependability, an interlock system based on safety PLC technology, distributed safety PLC software programming tools, PROFINET fieldbus networking, and current loops for hardwired interlock signal exchanges, has been prototyped and will be discussed.

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MOPWI023

Development Plan for Physics Application Software for FRIB Driver Linac

linac, ion, EPICS, operation

1201

M. Ikegami, G. Shen
FRIB, East Lansing, Michigan, USA

Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661.
FRIB is a heavy ion linac facility presently under construction at Michigan State University, USA, and its driver linac accelerates CW beams of all stable ions up to uranium to the energy of 200 MeV/u with the beam power of 400 kW. We plan to start beam commissioning of the driver linac from December 2017. An adequate software environment and infrastructure is critical for our commissioning and operation. Recently, a middle layer based architecture, EPICS V4 based services for example, for physics application has been rapidly developed at other facilities like NSLS II. It has been showing its flexibility, and portability. After reviewing those recent developments, we decided to adopt these services as software infrastructure for FRIB driver linac commissioning. It enables us to take advantage of their cutting edge technologies and maturity as a system sustained by the experience accumulated in the commissioning of NSLS-II. In this paper, we present a plan to develop physics application software for FRIB driver linac based on EPICS V4 services and related software. We also present a plan to adjust these EPICS V4 related software to meet the FRIB specific requirements.

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MOPWI024

Accelerator Online Simulation Platform

database, simulation, lattice, space-charge

1204

C.P. Chu, Y. Zhang
FRIB, East Lansing, Michigan, USA

Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University.
A platform for accelerator online beam simulation has been established for Facility for Rare Isotope Beams (FRIB). This modeling platform supports multiple simulation codes for different sections of the complex machine which cannot be properly modeled with a single online simulation tool. Model data for the platform is stored in a relational database which is designed to accommodate most simulation data. The stored data is accessible with physics intuitive data API (Application Programming Interface). Presently, the platform is supporting Open XAL, MAD-X and IMPACT simulation codes. In addition to the model data storage and access, tools such as data comparison and simple graphing capability are also included in the platform.

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MOPWI027

Open XAL Control Room Experience

controls, optics, operation, Windows

1214

C.P. Chu, D.G. Maxwell, Y. Zhang
FRIB, East Lansing, Michigan, USA
C.K. Allen, T.A. Pelaia II, A.P. Shishlo
ORNL, Oak Ridge, Tennessee, USA

Funding: This material is based upon work supported by the U.S. Department of Energy under Cooperative Agreement DE-SC0000661 and DE-AC05-00OR22725, the State of Michigan and Michigan State University.
This paper reports the control room experience, lessons learned, and quick deployment approach for the Open XAL application environment. Open XAL is a java-based framework for building high-level accelerator applications, it is a major revision of the XAL framework which was developed at the Spallation Neutron Source (SNS). Open XAL is site neutral and may be deployed at multiple accelerator facilities. Currently, Open XAL is installed at SNS and at the Re-Accelerator facility of Michigan State University. At SNS we are in the final process of replacing the old XAL environment with Open XAL; we describe the upgrade process and our accelerator operations experience using Open XAL. At Michigan State, Open XAL has been tested during a cryomodule commissioning and result will be shown.

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MOPWI036

Investigation of Continuous Scan Methods for Rapid Data Acquisition

detector, data-acquisition, experiment, hardware

1243

C.L. Li
East China University of Science and Technology, Shanghai, People's Republic of China
A.M. Kiss
SLAC, Menlo Park, California, USA
W.J. Zhang
University of Saskatchewan, Saskatoon, Canada

It is common practice to perform spatially resolved X ray data acquisition by automatically moving components to discrete locations and then measuring beam intensity with the system at rest. While effective, scanning in this manner can be time consuming, with motors needing to accelerate, move and decelerate at each location before recording data. Information between data points may be missed unless fine grid scans are performed, which accounts for a further increase of scan time. Recent advances in commercial hardware and software enables a continuous scan capability for a wide range of applications, which saves the start and end of step motors. To compare scanning performance, both step and continuous scan modes were examined using the SPEC command language with both commercial and in-house hardware. The advantages and limitations of each are discussed.

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MOPWI044

Beamline Insertions Manager at Jefferson Lab

hardware, EPICS, controls, operation

1253

M.C. Johnson
JLab, Newport News, Virginia, USA

Funding: This manuscript has been authored by Jefferson Science Associates, LLC under Contract No. DE-AC05-06OR23177 with the U.S. Department of Energy.
The beam viewer system at Jefferson Lab provides operators and beam physicists with qualitative and quantitative information on the transverse electron beam properties. There are over 140 beam viewers installed on the 12 GeV CEBAF accelerator. This paper describes an upgrade consisting of replacing the EPICS based system tasked with managing all viewers with a mixed system utilizing EPICS and high level software. Most devices, particularly the beam viewers, cannot be safely inserted into the beam line during high-current beam operations. Software is partly responsible for protecting the machine from untimely insertions. The multiplicity of beam-blocking and beam-vulnerable devices motivate us to try a data-driven approach. The beamline insertions application components are centrally managed and configured through an object-oriented software framework created for this purpose. A rules-based engine tracks the configuration and status of every device, along with the beam status of the machine segment containing the device. The application uses this information to decide on which device actions are allowed at any given time.

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MOPWI045

The CEBAF Element Database and Related Operational Software

database, hardware, controls, cavity

1256

T. L. Larrieu, M.E. Joyce, M. Keesee, C.J. Slominski, R.J. Slominski, D.L. Turner
JLab, Newport News, Virginia, USA

Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
The newly commissioned 12 GeV CEBAF accelerator relies on a flexible, scalable and comprehensive database to define the accelerator. This database delivers the configuration for CEBAF operational tools, including hardware checkout, the downloadable optics model, control screens, and much more. The presentation will describe the flexible design of the CEBAF Element Database (CED), its features and assorted use case examples.

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MOPWI047

Architectural Improvements and New Processing Tools for the Open XAL Online Model

cavity, simulation, hardware, coupling

1262

C.K. Allen, T.A. Pelaia II
ORNL, Oak Ridge, Tennessee, USA
J.M. Freed
University of South Carolina, Columbia, USA

Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725.
The Open XAL online model is the component of Open XAL* providing accelerator modeling dynamic synchronization to live hardware. Several significant architectural enhancements and feature additions have been made concerning the handling and processing of simulation data. The major structural change is the creation of a single class Trajectory<> that manages all simulation data. Another significant design change was the development of standard tools for processing simulation results. One may obtain machine parameters such as fixed orbit, phase advance, dispersion, etc., or beam-based calculations such as RMS size and centroid location simply by passing simulation results, i.e. a Trajectory<> object, to these computation tools. Finally, the ability to fully create composite modeling elements was implemented in the online model. Specifically, accelerator hardware can be modeled as a collection of constituent modeling elements. This sub-structure capability is extremely useful for modeling RF cavities consisting of coupled RF gaps coupled and drift spaces. We present an overview of the new architecture and how it is used when building applications.
* http://xaldev.sourceforge.net/

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MOPWI048

Open XAL Build System

site, database, interface, controls

1265

T.A. Pelaia II
ORNL, Oak Ridge, Tennessee, USA

Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725
Open XAL is an accelerator physics software platform developed in collaboration among several facilities around the world. The build system is implemented through Apache Ant build files and features zero configuration simplicity based on directory patterns. These directory patterns allow for correctly building the Open XAL environment including the core and site specific applications, services, extensions, plugins and resources. Options are available for deployment and custom application packaging. This paper describes the Open XAL build rules, options and workflows.

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MOPWI049

Open XAL Services Architecture

interface, framework, network, Linux

1267

T.A. Pelaia II
ORNL, Oak Ridge, Tennessee, USA

Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725
Open XAL is an accelerator physics software platform developed in collaboration among several facilities around the world. It includes a powerful new services extension that allows for natural remote procedure calls. The high level services interface is based upon custom implementations of modern standard protocols such as JSON-RPC and WebSockets. This choice of modern protocols allows for flexibility such as seamless communication with web clients free of plugins plus rich object type support. The JSON parser was designed for convenient data type transformations with easy extensibility, high performance and low memory overhead. The Open XAL services architecture features a simple application programming interface, high performance, memory efficiency and thread safety.

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MOPWI050

Open XAL Status Report 2015

site, database, framework, status

1270

T.A. Pelaia II, C.K. Allen, A.P. Shishlo, A.P. Zhukov
ORNL, Oak Ridge, Tennessee, USA
Y.-C. Chao, C. Gong, F.W. Jones, R. Newhouse
TRIUMF, Vancouver, Canada
P. Chu, D.G. Maxwell, Y. Zhang
FRIB, East Lansing, Michigan, USA
R. Fearn, L. Fernández, E. Laface, M. Muñoz
ESS, Lund, Sweden
J.M. Freed
University of South Carolina, Columbia, USA
P. Gillette, P. Laurent, G. Normand
GANIL, Caen, France
H.R. Hale
University of Tennessee, Knoxville, USA
Y. Li
IHEP, Beijing, People's Republic of China
I. List, M. Pavleski
Cosylab, Ljubljana, Slovenia
P. Scruggs
East Tennessee State University, Johnson City, USA

Funding: ORNL/SNS is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725
Open XAL is an accelerator physics software platform developed in collaboration among several facilities around the world. The Open XAL collaboration was formed in 2010 to port, improve and extend the successful XAL platform used at the Spallation Neutron Source for use in the broader accelerator community and to establish it as the standard platform for accelerator physics software. The site-independent core is complete, active applications have been ported, and now we are in the process of verification and transitioning to using Open XAL in production. This paper will present the current status and a roadmap for this project.

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TUPJE014

An X-Band Linac with Tunable Beam Energy

linac, electron, simulation, gun

1644

L. Zhang, H.B. Chen, Y.-C. Du, Q.X. Jin, J. Shi, C.-X. Tang, P. Wang, Z. Zhang
TUB, Beijing, People's Republic of China

The low-energy X-band linac has a wide application in medical imaging. In this paper, an X-band linac is designed to produce beam energy between 0.5MeV and 1.5MeV, and the output beam energy is continuously adjustable within this range. Two sections of linacs are combined and powered by a single microwave source. During the experiment, we can tune the RF phase and amplitude of the second section of the linac, the electron beam can see either acceleration or deceleration, which tunes the output energy. This paper presented the production of the whole linac system, as well as the measurement of the continuously-adjustable beam energy.

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TUPMA054

High Level Application for First Turns Commissioning in NSLS-II Storage Ring

storage-ring, GUI, lattice, controls

1953

S. Seletskiy, A. Blednykh, J. Choi, Y. Hidaka, B. Podobedov, G. Shen, L. Yang
BNL, Upton, Long Island, New York, USA

The typical problems occurring during commissioning of the first turns in the storage rings include shorted coils or reversed polarity of the magnets, cross-cabling of magnets power supplies and reversed polarity of BPMs. In this paper we describe a dedicated high level control application, which was created and utilized for commissioning of the first turns in NSLS-II storage ring.

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WEPMA002

The Beam Chopper Power Converter for MedAustron: Safety by Design and Development

hardware, kicker, controls, synchrotron

2741

T. Stadlbauer, R. Filippini, X. German, F. Osmić, P. Urschütz
EBG MedAustron, Wr. Neustadt, Austria
M.J. Barnes, T. Kramer
CERN, Geneva, Switzerland
M. Beerwald, D. Dirksen
Poynting GmbH, Dortmund, Germany

MedAustron is the Austrian centre for hadron therapy and non-clinical research. The beam chopper system is an essential component for patient safety in specific hazardous situations as well as for beam delivery from the synchrotron to the irradiation rooms. This paper presents the results from the development phase and the commissioning of the MedAustron beam chopper system. Details will be given on the design, the risk management, the test and the verification of the chopper power converter (PKC).

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMA002

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WEPMN031

Automated Quench Limit Test Procedure for Serial Production of XFEL RF Cavities

cavity, cryomodule, flattop, operation

2994

K. Kasprzak, D. Konwisorz, K. Krzysik, S. Myalski, J. Świerbleski, K. Turaj, M. Wiencek, A. Zwozniak
IFJ-PAN, Kraków, Poland
D. Kostin, K.P. Przygoda
DESY, Hamburg, Germany

In the Accelerator Module Test Facility (AMTF) at DESY in Hamburg RF cavities and accelerating cryomodules are tested for the European X-ray Free Electron Laser (XFEL). Measurements are done by a team of physicists, engineers and technicians from The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences in Kraków, Poland, as a part of Polish in-kind contribution to the XFEL. The testing procedures providing information about maximum available gradient and heat loads measurement are performed for the high gradients (up to 31MV/m). During these tests the cavity deformation caused by the Lorentz force is compensated by piezo (fast) tuners. For this purpose automated high level software was developed. This paper describes a method used to tune automatically the cavities during the RF tests. It was validated with the XFEL cryomodules. This improvement was implemented into the testing software and it is successfully used for testing of serial production cavities.

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WEPTY058

Diagnostics for High Power CW Accelerators

diagnostics, operation, lattice, controls

3405

S. Assadi
Texas A&M University, College Station, Texas, USA

Funding: Work is partially supported by grants from the State of Texas (ASE) & the Michelle foundation
High power, continuous wave (cw) accelerators are proposed for applications such as Accelerator Driven Systems (ADS) for subcritical reactor strategies and heavy ion accelerators for the production of rare isotopes. Because of the high beam powers and high energy loss with beam interception of material, the beam diagnostic designs are necessarily shifting to non-intercepting, real-time feedback devices that can be fully integrated with the accelerator machine protection system (MPS) and operation control system including online models. Appropriate for these applications, three types of beam diagnostics (lanthanum bromide scintillation coincidence detectors, GaN neutron and gamma detectors, and beam position monitors) are presented.

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THPF001

Tomography of Horizontal Phase Space Distribution of a Slow Extracted Proton Beam in the MedAustron High Energy Beam Transfer Line

simulation, extraction, proton, synchrotron

3673

A. Wastl
ATI, Vienna, Austria
M. Benedikt
CERN, Geneva, Switzerland
A. Garonna
EBG MedAustron, Wr. Neustadt, Austria

Funding: EBG MedAustron Marie Curie Strasse 5 A-2700 Wiener Neustadt www.medaustron.at
MedAustron is a synchrotron based hadron therapy and research center in Wiener Neustadt, Austria, which currently is under commissioning for the first patient treatment. The High Energy Beam Transfer Line (HEBT) consists of mul- tiple functional modules amongst which the phase-shifter- stepper PSS* is the most important module located where the dispersion from the synchrotron is zero and upstream of the switching magnet to the first irradiation room. The PSS is used to control the beam size for the downstream modules and for this scope rotates the beam in horizontal phase space by adjusting the phase advance. This functionality is used in this study to measure beam profiles for multiple phase space angles which act as input for a tomographic reconstruction. Simulation and measurement results are presented.
* M. Benedikt et al, A new concept for the control of a slow-extracted beam in a line with rotational optics, Nuclear Instruments and Methods in Physics Research Section A, Vol 430, Issues 2–3, 1999

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THPF076

Thermal and Structural Analysis of the 72.75 MHz LINCE RFQ

rfq, cavity, simulation, controls

3857

A.K. Orduz, A. Berjillos, C. Bonțoiu, J.A. Dueñas, I. Martel
University of Huelva, Huelva, Spain
A. Garbayo
AVS, Elgoibar, Spain

Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA.
The 72.75 MHz LINCE RFQ is designed to function at room temperature. Effective operation of the RFQ cavity requires efficient water cooling in order to dissipate significant resistive power non-uniformly distributed on the copper walls and vanes. This amounts to about 10 kWfor one 0.5m long RFQ section. Cylindrical cooling channels have been designed and optimized by varying their diameter and position in order to minimize the frequency shift generated by thermal displacements. The article reports results of power loss simulations coupled with electromagnetic modelling studies and their consequences on the RFQ performance in terms of resonant frequency and thermal deformations.

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