IPAC2015 - List of Keywords (framework)

Paper	Title	Other Keywords	Page
MOPWA003	Optimal Generalized Finite Difference Solution to the Particle-in-Cell Problem	simulation, plasma, space-charge, factory	77
	X. Wang, X. Jiao, H. Liu, V. Samulyak, K. Yu SBU, Stony Brook, USA V. Samulyak BNL, Upton, Long Island, New York, USA
	The particle-in-cell (PIC) method is widely used in applications, such as in electromagnetics, but the accuracy of its solutions degrades when the particle distribution is highly non-uniform. In our work, we propose an adaptive PIC method with optimal point distribution and a generalized finite difference (GFD) scheme. Our method replaces the Cartesian grid in the classical PIC with adaptive computational nodes or particles, to which the charges from the sample particles are assigned by a weighted least-square approximations. The partial differential equation is then discretized using a GFD method and solved with fast linear solvers. The density of computational particles is chosen adaptively, so that the error from GFD and that from Monte Carlo integration are balanced and the total error is approximately minimized. We also present the verification results using electrostatic problems and comparison of accuracy and solution time of our method with the classical PIC.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA003
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MOPWA004	Reformulation of the Action and Phase Jump Method to Obtain Magnetic Errors in the LHC IRs	quadrupole, simulation, lattice, interaction-region	80
	A.C. García-Bonilla, J.F. Cardona UNAL, Bogota D.C, Colombia
	Funding: Fundación Para la Promoción de la Investigación y la Tecnología del Banco de la República and Division de Investigación Bogotá (DIB). One of the major problems when doing the commissioning of an accelerator is to identify and correct the linear components of magnetic errors. The Action and Phase Jump Technique is one of the available methods to perform this task. For this method to work, it is necessary to have one BPM measurement at the IR, the region where the magnetic error is evaluated. In some cases, this BPM measurement become the biggest source of uncertainty when the action and phase jump technique is used. In this paper, a new formulation based on this method is presented. This new formulation doesn't make any use of BPM measurements at the IR, thereby allowing more robust error estimations. Quadrupole errors in the LHC lattice are estimated with this new formulation, using both, simulated data and LHC experimental data. A comparison with the previous formulation is included. The results on simulated data show that the reformulation leads to a reduction in the uncertainty, while for the experimental case, the reduction is not so clear. Explanations for this behavior and possible remedies will also be discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA004
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MOPWA027	Generic Settings Generation for FAIR: First Experience at SIS18	resonance, controls, operation, cavity	156
	D. Ondreka, J. Fitzek, H. Liebermann, R. Müller GSI, Darmstadt, Germany
	The accelerators of the FAIR facility will be operated using a new control system presently under design at GSI. One of its major components, the module for settings generation and management, is based on the framework LSA developed at CERN. Its task is the provision and administration of set values for all devices in the FAIR facility. The set values for any accelerator are derived from a machine model, implemented by accelerator physicists using the features of the LSA framework. In view of the large number of accelerators in the FAIR facility, the aim is to develop a generic model, applicable to any of those machines. This requires the introduction of an additional logical layer on top of the LSA framework, ensuring the coherence of the modeling strategy across all accelerators. Following this design concept, a prototype of the FAIR settings management system has been realized at GSI, providing support for a large number of operation modes relevant for the later operation of FAIR. The prototype has been used extensively during recent machine experiments with the synchrotron SIS18, performed both to benchmark the machine model and to support further machine developments for FAIR.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA027
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MOPJE029	A Linear Accelerator Simulation Framework	simulation, ground-motion, collider, lattice	341
	J. Snuverink JAI, Egham, Surrey, United Kingdom N. Fuster-Martínez IFIC, Valencia, Spain J. Pfingstner CERN, Geneva, Switzerland J. Pfingstner University of Oslo, Oslo, Norway
	Many good tracking tools are available for simulations for linear accelerators. However, several simple tasks need to be performed repeatedly, like lattice definitions, beam setup, output storage, etc. In addition, complex simulations can become unmanageable quite easily. A high level layer would therefore be beneficial. We propose LinSim, a linear accelerator framework with the codes PLACET and Guinea-Pig. It provides a documented well-debugged high level layer of functionality. Users only need to provide the input settings and essential code and/or use some of the many implemented imperfections and algorithms. It can be especially useful for first-time users. Currently the following accelerators are implemented: ATF2, ILC, CLIC and FACET. This paper discusses the framework design and shows its strength in some condensed examples.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPJE029
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MOPJE031	Field Map Model for the ESS Linac Simulator	cavity, linac, proton, space-charge	348
	E. Laface ESS, Lund, Sweden I. List Cosylab, Ljubljana, Slovenia
	The proton beam driving the spallation process at the European Spallation Source, in Lund, will be accelerated and delivered onto a tungsten target by a linac. This linac is composed of four different families of accelerating structures: adrift tube linac, a section of spoke resonators and two sections of elliptical cavities for the particles’ medium and high relativistic β. These structures provide 99.8% of the total energy gained by the beam along the accelerator. It is necessary, then, to have an accurate model describing the physics of the cavities in the ESS Linac Simulator (ELS), which isthe online model that will simulate the accelerator during operation. Here, we present an RF-cavity model based on the field maps that we implemented in ELS, showing a maximum 10% deviation from TraceWin in the horizontal, vertical and longitudinal planes.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPJE031
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MOPJE082	Analytical Approach to the Beam-Beam Interaction with the Hourglass Effect	luminosity, coupling, detector, collider	510
	M.P. Crouch, R.B. Appleby UMAN, Manchester, United Kingdom B.D. Muratori STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
	Funding: STFC HL-LHC The HL-LHC upgrade will allow higher luminosities to be reached in the LHC. To achieve higher luminosities the β-function at the IP is decreased, which in turn will result in the hourglass effect becoming more prominent as the transverse bunch sizes become comparable to the length of the bunch. This effect reduces the luminosity since not all particles in the bunch will collide at the minimum IP. The standard derivation of the electric and magnetic fields of the beam-beam interaction is that undertaken by Bassetti and Erskine. The derivation by Bassetti Erskine does not include a coupling between bunch planes. When the transverse bunch sizes are comparable to the length of the bunch the magnitude of the transverse kick will be dependent on the longitudinal position. Currently only numerical methods are available to evaluate this effect. Here a theoretical framework is outlined that provides an analytical approach to derive the electric field for the beam-beam interaction with a coupling between the transverse and longitudinal planes.
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MOPMA050	Smooth Fast Multipole Method for Space Charge Tracking: An Alternate to Particle-In-Cell	multipole, space-charge, simulation, emittance	663
	A.J. Gee, B. Erdelyi Northern Illinois University, DeKalb, Illinois, USA B. Erdelyi ANL, Argonne, USA
	The fast multipole method (FMM) algorithm was developed by Greengard and Rokhlin in 1987 . As one of the top ten algorithms of the 20th century, it has been applied in a wide range of fields. The FMM complexity is O(N), where N is the number of articles, allowing for large-scale simulations. However, it includes all the two-body collisional forces, in contrast to other methods such as the popular particle in-cell (PIC) methods. While collisionality can be very important, many applications require only the mean field effects. PIC is frequently used in this regime. Due to recent concerns of unphysical effects of grids, interpolation and other approximations in PIC codes, an alternative based on different underlying assumptions would prove enlightening. For these cases, a smoothed or softened FMM using a Plummer-like smoothing parameter holds much promise. Unfortunately, the original FMM based on analytic expansions of the 1/r-like potentials does not allow for Plummer softening. We present our new soft-FMM employing differential algebras (DA) to obtain the modified expansions. We also compare the performance of the smoothed DA-FMM with examples from PIC simulations. L. Greengard and V. Rokhlin. “A fast algorithm for particle simulations".
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPMA050
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MOPHA002	Operational Applications - a Software Framework Used for the Commissioning of the MedAustron Accelerator	injection, software, 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.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPHA002
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MOPHA046	!CHAOS Status and Evolution	controls, interface, distributed, database	894
	G. Mazzitelli, C. Bisegni, S. Caschera, G. Di Pirro, L.G. Foggetta, R. Gargana, E. Gioscio, D. Maselli, A. Michelotti, R. Orrù, S. Pioli, F. Spagnoli, A. Stecchi, M. Tota INFN/LNF, Frascati (Roma), Italy D.G.C. Di Giulio INFN-Roma II, Roma, Italy
	A synthesis of the “!CHAOS: a cloud of controls” project and its application to accelerators and large experiments will be presented. We will describe here how the !CHAOS project has evolved from a candidate for the SuperB accelerator control system to a facility for IT distributed infrastructures. !CHAOS is currently, not only suitable for accelerators and large High Energy Physics (HEP) experiments, but is also applicable to other contexts, such as social and industrial applications. Preliminary results achieved on an accelerator use case are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPHA046
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MOPTY059	First Operational Experience of DSL Based Analysis Modules for LHC Hardware Commissioning	DSL, operation, Domain-Specific-Languages, superconducting-magnet	1073
	M. Zerlauth, C. Aguilera-Padilla, M. Audrain, Z. Charifoulline, M. Dragu, J.C. Garnier, R.M. Heil, M. Koza, K.H. Krol, T. Martins Ribeiro, R. Orlandi, S. Rowan, K.S. Stamos CERN, Geneva, Switzerland
	The Large Hadron Collider powering systems have been tested and commissioned before to start the second run of physics production. This commissioning used for the first time analysis modules defined directly by system experts in an english-like domain specific language. In these modules, the experts defined assertions that the data generated by the powering tests must verify in order for the test to pass. These modules concerned 4 tests executed for more than 1000 systems. They allowed experts to identify issues that were hidden behind the repetitive manual analysis performed during the previous campaigns. This paper describes this first operational experience of the analysis modules, as well as the replay of all the previous campaign with them. It will also present a critical point of view on these modules to identify their drawbacks and the next step to improve this system.
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MOPTY076	Development of EPICS Applications for the Taiwan Light Source	EPICS, controls, interface, GUI	1116
	Y.-S. Cheng, J. Chen, P.C. Chiu, K.T. Hsu, C.H. Huang, C.Y. Liao NSRRC, Hsinchu, Taiwan
	The TLS (Taiwan Light Source) is a third generation of synchrotron light source, and it has been operated since 1993. The TLS control system is a proprietary design. It was performed minor upgrade several times to avoid obsolete of some system components and keep up-to-date during last two decades. The control system of the TPS project (Taiwan Photon Source) is based upon the EPICS framework. To save resources for TLS control system maintenance, adopt EPICS for newly developed and rejuvenated subsystems for some of the TLS control interfaces includes BPM system, insertion devices, bunch-by-bunch feedbacks, electronics instruments interface and so on. Some EPICS related applications have been developed, and EPICS graphical user interface is also operated at the TLS control consoles environment normally. Current system allowed two kinds of control environments working together. The efforts will be described at this report.
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MOPWI020	Development of Simple Tracking Libraries for ALS-U	lattice, Windows, simulation, dynamic-aperture	1192
	H. Nishimura, D. Robin, K. Song, C. Steier, C. Sun, W. Wan LBNL, Berkeley, California, USA
	Funding: Work supported by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 The conceptual lattice design study of a new diffraction-limited light source has become much more computer intensive than that for the 3rd-generation rings. We are in a process of upgrading our existing accelerator modeling and simulation libraries, Goemon* in C++ and a new version Tracy#, to fulfil such new demand. The C++ version has been actively used on the ALS HPC cluster for multi-objective optimization (MOGA) to optimize the ALS lattice, and recently for ALS-U*. This time, based on the current version in C#, we extracted its subset and ported it to C and C++. The routines are made thread-safe to enable OpenMP locally, and CPU-time profiling was extensively used to remove redundancies. The new refitting method of quad settings brought smooth switching from 5-dim to 6-dim. The data structure itself is simplified for the use on GPU that is based on our previous effort of tracking particles in GPU**. Tracy# itself is also upgraded to cooperate with these C/C++ versions. Their use from Python will be also mentioned. H. Nishimura, PAC01, 3066-3068. H. Nishimura, ICAP09. * C. Sun, et. al.,PAC11, 793-795. ** H. Tarawneh, et. al.,J.Phys.493 012020, 2014. *** H. Nishimura, et. al.,PAC11, 1764-1766.
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MOPWI049	Open XAL Services Architecture	interface, network, software, 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, software, 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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TUPWI005	Proton Irradiations of Micro-TOM Red Hairy Roots to Mimic Space Conditions	proton, experiment, controls, radiation	2249
	M. Vadrucci, A. Ampollini, G. Bazzano, P. Nenzi, L. Picardi, C. Ronsivalle, V. Surrenti ENEA C.R. Frascati, Frascati (Roma), Italy F. Ambrosini Università di Roma "La Sapienza", SAPIENZA-DIET, Roma, Italy E. Benvenuto, A. Desiderio, S. Massa, C. Snels, M.E. Villani ENEA Casaccia, Roma, Italy
	Funding: Radiation Sources Laboratory UTAPRAD Department ENEA C.R. Frascati Via E. Fermi, 45 00044 Frascati (RM), Italy ENEA The purpose of the BIOxTREME project, launched by ENEA and funded by ASI (Italian Space Agency), is to formulate new biological drugs having a stimulant activity on the immune system finalizing the production for a ready to use resource in Bioregenerative Life Support Systems (BLSSs) for space missions with extended durations, in deep space, and with multiple crews. One of the project tasks is to study the effects of physical insults on plants, simulating cosmic environment on production platforms by static magnetic fields, microgravity and ionizing radiation. In order to examine the biological effects, to test plant radio-resistance and to build dose-response curves we carried out proton irradiations of a tomato cultivar Micro-Tom red hairy roots with the TOP-IMPLART accelerator at the ENEA Frascati Research center. The biological samples were placed in a holder specially made in a movable real-time monitoring chamber calibrated in dose. The fluence-homogeneity measurements over the sample and the calibration of the monitoring system were performed using GafChromic EBT3 films. The paper describes the experimental set-up and reports the preliminary results.
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WEPTY057	Adaptable Machine Protection Architecture for CW, High Intensity Accelerators	database, operation, network, real-time	3402
	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 An adaptable architecture of a machine protection system (MPS) suitable for continuous wave (cw), high intensity accelerators like those proposed for Accelerator Driven Systems (ADS) for subcritical reactor strategies and heavy ion accelerators for the production of rare isotopes is presented. A system of databases, networks and nodes that can systematically and flexibly be reconfigured to rebalance the required metadata is used. Additional features include reconfigurable machine setup templates that can rigorously be tested with mirror redundant online backups, the utilization of external reconfigurable geometric algorithms for the data channels and the network distribution, and the inclusion of initial system requirements as well as envisioned upgrades.
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THPF054	XAL Development for CSNS/RCS Commissioning	quadrupole, simulation, controls, dipole	3821
	Y.W. An, L. Huang, W.B. Liu, Y.D. Liu, S. Wang, Y. Wei IHEP, Beijing, People's Republic of China
	Funding: Work supported by the National Natural Science Fund Committee, contract 11405189. As a key component of the China Spallation Neutron Source (CSNS) Project, the Rapid Cycling Synchrotron (RCS) accumulates and accelerates the proton beam from 80MeV to 1.6GeV for extracting and striking the target with a repetition rate of 25Hz. A high level application programming framework code called XAL, based on Java Language with a well-performance online model, initially developed at the Spallation Neutron Source (SNS), has been installed as a part of control system via connection to EPICS for CSNS. Much of the applications have been initially established such as Tune Scan, Tune Monitor, Orbit Response Matrix Measurement, RCS Orbit Display, and Beta Function Measurement for preparing CSNS/RCS commissioning are showed in this paper.
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Paper

Title

Other Keywords

Page

MOPWA003

Optimal Generalized Finite Difference Solution to the Particle-in-Cell Problem

simulation, plasma, space-charge, factory

77

X. Wang, X. Jiao, H. Liu, V. Samulyak, K. Yu
SBU, Stony Brook, USA
V. Samulyak
BNL, Upton, Long Island, New York, USA

The particle-in-cell (PIC) method is widely used in applications, such as in electromagnetics, but the accuracy of its solutions degrades when the particle distribution is highly non-uniform. In our work, we propose an adaptive PIC method with optimal point distribution and a generalized finite difference (GFD) scheme. Our method replaces the Cartesian grid in the classical PIC with adaptive computational nodes or particles, to which the charges from the sample particles are assigned by a weighted least-square approximations. The partial differential equation is then discretized using a GFD method and solved with fast linear solvers. The density of computational particles is chosen adaptively, so that the error from GFD and that from Monte Carlo integration are balanced and the total error is approximately minimized. We also present the verification results using electrostatic problems and comparison of accuracy and solution time of our method with the classical PIC.

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MOPWA004

Reformulation of the Action and Phase Jump Method to Obtain Magnetic Errors in the LHC IRs

quadrupole, simulation, lattice, interaction-region

80

A.C. García-Bonilla, J.F. Cardona
UNAL, Bogota D.C, Colombia

Funding: Fundación Para la Promoción de la Investigación y la Tecnología del Banco de la República and Division de Investigación Bogotá (DIB).
One of the major problems when doing the commissioning of an accelerator is to identify and correct the linear components of magnetic errors. The Action and Phase Jump Technique is one of the available methods to perform this task. For this method to work, it is necessary to have one BPM measurement at the IR, the region where the magnetic error is evaluated. In some cases, this BPM measurement become the biggest source of uncertainty when the action and phase jump technique is used. In this paper, a new formulation based on this method is presented. This new formulation doesn't make any use of BPM measurements at the IR, thereby allowing more robust error estimations. Quadrupole errors in the LHC lattice are estimated with this new formulation, using both, simulated data and LHC experimental data. A comparison with the previous formulation is included. The results on simulated data show that the reformulation leads to a reduction in the uncertainty, while for the experimental case, the reduction is not so clear. Explanations for this behavior and possible remedies will also be discussed.

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MOPWA027

Generic Settings Generation for FAIR: First Experience at SIS18

resonance, controls, operation, cavity

156

D. Ondreka, J. Fitzek, H. Liebermann, R. Müller
GSI, Darmstadt, Germany

The accelerators of the FAIR facility will be operated using a new control system presently under design at GSI. One of its major components, the module for settings generation and management, is based on the framework LSA developed at CERN. Its task is the provision and administration of set values for all devices in the FAIR facility. The set values for any accelerator are derived from a machine model, implemented by accelerator physicists using the features of the LSA framework. In view of the large number of accelerators in the FAIR facility, the aim is to develop a generic model, applicable to any of those machines. This requires the introduction of an additional logical layer on top of the LSA framework, ensuring the coherence of the modeling strategy across all accelerators. Following this design concept, a prototype of the FAIR settings management system has been realized at GSI, providing support for a large number of operation modes relevant for the later operation of FAIR. The prototype has been used extensively during recent machine experiments with the synchrotron SIS18, performed both to benchmark the machine model and to support further machine developments for FAIR.

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MOPJE029

A Linear Accelerator Simulation Framework

simulation, ground-motion, collider, lattice

341

J. Snuverink
JAI, Egham, Surrey, United Kingdom
N. Fuster-Martínez
IFIC, Valencia, Spain
J. Pfingstner
CERN, Geneva, Switzerland
J. Pfingstner
University of Oslo, Oslo, Norway

Many good tracking tools are available for simulations for linear accelerators. However, several simple tasks need to be performed repeatedly, like lattice definitions, beam setup, output storage, etc. In addition, complex simulations can become unmanageable quite easily. A high level layer would therefore be beneficial. We propose LinSim, a linear accelerator framework with the codes PLACET and Guinea-Pig. It provides a documented well-debugged high level layer of functionality. Users only need to provide the input settings and essential code and/or use some of the many implemented imperfections and algorithms. It can be especially useful for first-time users. Currently the following accelerators are implemented: ATF2, ILC, CLIC and FACET. This paper discusses the framework design and shows its strength in some condensed examples.

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MOPJE031

Field Map Model for the ESS Linac Simulator

cavity, linac, proton, space-charge

348

E. Laface
ESS, Lund, Sweden
I. List
Cosylab, Ljubljana, Slovenia

The proton beam driving the spallation process at the European Spallation Source, in Lund, will be accelerated and delivered onto a tungsten target by a linac. This linac is composed of four different families of accelerating structures: adrift tube linac, a section of spoke resonators and two sections of elliptical cavities for the particles’ medium and high relativistic β. These structures provide 99.8% of the total energy gained by the beam along the accelerator. It is necessary, then, to have an accurate model describing the physics of the cavities in the ESS Linac Simulator (ELS), which isthe online model that will simulate the accelerator during operation. Here, we present an RF-cavity model based on the field maps that we implemented in ELS, showing a maximum 10% deviation from TraceWin in the horizontal, vertical and longitudinal planes.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPJE031

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MOPJE082

Analytical Approach to the Beam-Beam Interaction with the Hourglass Effect

luminosity, coupling, detector, collider

510

M.P. Crouch, R.B. Appleby
UMAN, Manchester, United Kingdom
B.D. Muratori
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom

Funding: STFC HL-LHC
The HL-LHC upgrade will allow higher luminosities to be reached in the LHC. To achieve higher luminosities the β-function at the IP is decreased, which in turn will result in the hourglass effect becoming more prominent as the transverse bunch sizes become comparable to the length of the bunch. This effect reduces the luminosity since not all particles in the bunch will collide at the minimum IP. The standard derivation of the electric and magnetic fields of the beam-beam interaction is that undertaken by Bassetti and Erskine. The derivation by Bassetti Erskine does not include a coupling between bunch planes. When the transverse bunch sizes are comparable to the length of the bunch the magnitude of the transverse kick will be dependent on the longitudinal position. Currently only numerical methods are available to evaluate this effect. Here a theoretical framework is outlined that provides an analytical approach to derive the electric field for the beam-beam interaction with a coupling between the transverse and longitudinal planes.

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MOPMA050

Smooth Fast Multipole Method for Space Charge Tracking: An Alternate to Particle-In-Cell

multipole, space-charge, simulation, emittance

663

A.J. Gee, B. Erdelyi
Northern Illinois University, DeKalb, Illinois, USA
B. Erdelyi
ANL, Argonne, USA

The fast multipole method (FMM) algorithm was developed by Greengard and Rokhlin in 1987 *. As one of the top ten algorithms of the 20th century, it has been applied in a wide range of fields. The FMM complexity is O(N), where N is the number of articles, allowing for large-scale simulations. However, it includes all the two-body collisional forces, in contrast to other methods such as the popular particle in-cell (PIC) methods. While collisionality can be very important, many applications require only the mean field effects. PIC is frequently used in this regime. Due to recent concerns of unphysical effects of grids, interpolation and other approximations in PIC codes, an alternative based on different underlying assumptions would prove enlightening. For these cases, a smoothed or softened FMM using a Plummer-like smoothing parameter holds much promise. Unfortunately, the original FMM based on analytic expansions of the 1/r-like potentials does not allow for Plummer softening. We present our new soft-FMM employing differential algebras (DA) to obtain the modified expansions. We also compare the performance of the smoothed DA-FMM with examples from PIC simulations.
* L. Greengard and V. Rokhlin. “A fast algorithm for particle simulations".

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MOPHA002

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

injection, software, 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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MOPHA046

!CHAOS Status and Evolution

controls, interface, distributed, database

894

G. Mazzitelli, C. Bisegni, S. Caschera, G. Di Pirro, L.G. Foggetta, R. Gargana, E. Gioscio, D. Maselli, A. Michelotti, R. Orrù, S. Pioli, F. Spagnoli, A. Stecchi, M. Tota
INFN/LNF, Frascati (Roma), Italy
D.G.C. Di Giulio
INFN-Roma II, Roma, Italy

A synthesis of the “!CHAOS: a cloud of controls” project and its application to accelerators and large experiments will be presented. We will describe here how the !CHAOS project has evolved from a candidate for the SuperB accelerator control system to a facility for IT distributed infrastructures. !CHAOS is currently, not only suitable for accelerators and large High Energy Physics (HEP) experiments, but is also applicable to other contexts, such as social and industrial applications. Preliminary results achieved on an accelerator use case are discussed.

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MOPTY059

First Operational Experience of DSL Based Analysis Modules for LHC Hardware Commissioning

DSL, operation, Domain-Specific-Languages, superconducting-magnet

1073

M. Zerlauth, C. Aguilera-Padilla, M. Audrain, Z. Charifoulline, M. Dragu, J.C. Garnier, R.M. Heil, M. Koza, K.H. Krol, T. Martins Ribeiro, R. Orlandi, S. Rowan, K.S. Stamos
CERN, Geneva, Switzerland

The Large Hadron Collider powering systems have been tested and commissioned before to start the second run of physics production. This commissioning used for the first time analysis modules defined directly by system experts in an english-like domain specific language. In these modules, the experts defined assertions that the data generated by the powering tests must verify in order for the test to pass. These modules concerned 4 tests executed for more than 1000 systems. They allowed experts to identify issues that were hidden behind the repetitive manual analysis performed during the previous campaigns. This paper describes this first operational experience of the analysis modules, as well as the replay of all the previous campaign with them. It will also present a critical point of view on these modules to identify their drawbacks and the next step to improve this system.

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MOPTY076

Development of EPICS Applications for the Taiwan Light Source

EPICS, controls, interface, GUI

1116

Y.-S. Cheng, J. Chen, P.C. Chiu, K.T. Hsu, C.H. Huang, C.Y. Liao
NSRRC, Hsinchu, Taiwan

The TLS (Taiwan Light Source) is a third generation of synchrotron light source, and it has been operated since 1993. The TLS control system is a proprietary design. It was performed minor upgrade several times to avoid obsolete of some system components and keep up-to-date during last two decades. The control system of the TPS project (Taiwan Photon Source) is based upon the EPICS framework. To save resources for TLS control system maintenance, adopt EPICS for newly developed and rejuvenated subsystems for some of the TLS control interfaces includes BPM system, insertion devices, bunch-by-bunch feedbacks, electronics instruments interface and so on. Some EPICS related applications have been developed, and EPICS graphical user interface is also operated at the TLS control consoles environment normally. Current system allowed two kinds of control environments working together. The efforts will be described at this report.

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MOPWI020

Development of Simple Tracking Libraries for ALS-U

lattice, Windows, simulation, dynamic-aperture

1192

H. Nishimura, D. Robin, K. Song, C. Steier, C. Sun, W. Wan
LBNL, Berkeley, California, USA

Funding: Work supported by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231
The conceptual lattice design study of a new diffraction-limited light source has become much more computer intensive than that for the 3rd-generation rings. We are in a process of upgrading our existing accelerator modeling and simulation libraries, Goemon* in C++ and a new version Tracy#**, to fulfil such new demand. The C++ version has been actively used on the ALS HPC cluster for multi-objective optimization (MOGA) to optimize the ALS lattice***, and recently for ALS-U****. This time, based on the current version in C#, we extracted its subset and ported it to C and C++. The routines are made thread-safe to enable OpenMP locally, and CPU-time profiling was extensively used to remove redundancies. The new refitting method of quad settings brought smooth switching from 5-dim to 6-dim. The data structure itself is simplified for the use on GPU that is based on our previous effort of tracking particles in GPU*****. Tracy# itself is also upgraded to cooperate with these C/C++ versions. Their use from Python will be also mentioned.
* H. Nishimura, PAC01, 3066-3068.
** H. Nishimura, ICAP09.
*** C. Sun, et. al.,PAC11, 793-795.
**** H. Tarawneh, et. al.,J.Phys.493 012020, 2014.
***** H. Nishimura, et. al.,PAC11, 1764-1766.

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MOPWI049

Open XAL Services Architecture

interface, network, software, 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, software, 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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TUPWI005

Proton Irradiations of Micro-TOM Red Hairy Roots to Mimic Space Conditions

proton, experiment, controls, radiation

2249

M. Vadrucci, A. Ampollini, G. Bazzano, P. Nenzi, L. Picardi, C. Ronsivalle, V. Surrenti
ENEA C.R. Frascati, Frascati (Roma), Italy
F. Ambrosini
Università di Roma "La Sapienza", SAPIENZA-DIET, Roma, Italy
E. Benvenuto, A. Desiderio, S. Massa, C. Snels, M.E. Villani
ENEA Casaccia, Roma, Italy

Funding: Radiation Sources Laboratory UTAPRAD Department ENEA C.R. Frascati Via E. Fermi, 45 00044 Frascati (RM), Italy ENEA
The purpose of the BIOxTREME project, launched by ENEA and funded by ASI (Italian Space Agency), is to formulate new biological drugs having a stimulant activity on the immune system finalizing the production for a ready to use resource in Bioregenerative Life Support Systems (BLSSs) for space missions with extended durations, in deep space, and with multiple crews. One of the project tasks is to study the effects of physical insults on plants, simulating cosmic environment on production platforms by static magnetic fields, microgravity and ionizing radiation. In order to examine the biological effects, to test plant radio-resistance and to build dose-response curves we carried out proton irradiations of a tomato cultivar Micro-Tom red hairy roots with the TOP-IMPLART accelerator at the ENEA Frascati Research center. The biological samples were placed in a holder specially made in a movable real-time monitoring chamber calibrated in dose. The fluence-homogeneity measurements over the sample and the calibration of the monitoring system were performed using GafChromic EBT3 films. The paper describes the experimental set-up and reports the preliminary results.

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WEPTY057

Adaptable Machine Protection Architecture for CW, High Intensity Accelerators

database, operation, network, real-time

3402

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
An adaptable architecture of a machine protection system (MPS) suitable for continuous wave (cw), high intensity accelerators like those proposed for Accelerator Driven Systems (ADS) for subcritical reactor strategies and heavy ion accelerators for the production of rare isotopes is presented. A system of databases, networks and nodes that can systematically and flexibly be reconfigured to rebalance the required metadata is used. Additional features include reconfigurable machine setup templates that can rigorously be tested with mirror redundant online backups, the utilization of external reconfigurable geometric algorithms for the data channels and the network distribution, and the inclusion of initial system requirements as well as envisioned upgrades.

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THPF054

XAL Development for CSNS/RCS Commissioning

quadrupole, simulation, controls, dipole

3821

Y.W. An, L. Huang, W.B. Liu, Y.D. Liu, S. Wang, Y. Wei
IHEP, Beijing, People's Republic of China

Funding: Work supported by the National Natural Science Fund Committee, contract 11405189.
As a key component of the China Spallation Neutron Source (CSNS) Project, the Rapid Cycling Synchrotron (RCS) accumulates and accelerates the proton beam from 80MeV to 1.6GeV for extracting and striking the target with a repetition rate of 25Hz. A high level application programming framework code called XAL, based on Java Language with a well-performance online model, initially developed at the Spallation Neutron Source (SNS), has been installed as a part of control system via connection to EPICS for CSNS. Much of the applications have been initially established such as Tune Scan, Tune Monitor, Orbit Response Matrix Measurement, RCS Orbit Display, and Beta Function Measurement for preparing CSNS/RCS commissioning are showed in this paper.

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