| Paper | Title | Other Keywords | Page |
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| MOPHA046 | !CHAOS Status and Evolution | controls, framework, interface, distributed | 894 |
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| 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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| MOPTY055 | Beam Loss Monitoring for Run 2 of the LHC | monitoring, injection, detector, beam-losses | 1057 |
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| The Beam Loss Monitoring (BLM) system of the LHC consists of over 3600 ionization chambers. The main task of the system is to prevent the superconducting magnets from quenching and protect the machine components from damage, as a result of critical beam losses. The BLM system therefore requests a beam abort when the measured dose in the chambers exceeds a threshold value. During Long Shutdown 1 (LS1) a series of modifications were made to the system. Based on the experience from Run 1 and from improved simulation models, all the threshold settings were revised, and modified where required. This was done to improve the machine safety at 7 TeV, and to reduce beam abort requests when neither a magnet quench or damage to machine components is expected. In addition to the updates of the threshold values, about 800 monitors were relocated. This improves the response to unforeseen beam losses in the millisecond time scale due to micron size dust particles present in the vacuum chamber. This contribution will discuss all the changes made to the BLM system, with the reasoning behind them. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY055 | ||
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| MOPWI015 | A Low Time-Dispersion Refractive Optical Transmission Line for Streak Camera Measurements | electron, experiment, resonance, plasma | 1178 |
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Funding: Work supported by the U.S. Department of Energy office of High Energy Physics. Streak camera measurements of the charge particle bunch length are limited in resolution due to several factors: (1) the light from the source (optical transition radiation, Cherenkov, synchrotron radiation, etc.); (2) time dispersion introduced in the optical transmission line between the source and the streak camera; and finally (3) the streak camera resolution. The limiting resolution usually arises from the optical transmission line. While an all-reflective transmission line can eliminate dispersion, the system is complicated and expensive. In this paper, we consider how to design a refractive optical transport line to minimize the time dispersion while maximizing the signal. We present a theoretical model of the dispersion, modeling, and measurements of the time dispersion for several different lens materials. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWI015 | ||
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| MOPWI024 | Accelerator Online Simulation Platform | simulation, lattice, software, space-charge | 1204 |
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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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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWI024 | ||
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| MOPWI045 | The CEBAF Element Database and Related Operational Software | hardware, controls, software, cavity | 1256 |
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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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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWI045 | ||
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| MOPWI048 | Open XAL Build System | site, interface, controls, software | 1265 |
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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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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWI048 | ||
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| MOPWI050 | Open XAL Status Report 2015 | site, framework, software, status | 1270 |
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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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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWI050 | ||
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| MOPWI052 | Responsivity Study of Diamond X-ray Monitors with nUNCD Contact | photon, synchrotron, detector, plasma | 1273 |
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| Nitrogen doped ultrananocrystalline diamond (nUNCD) grown on the surface of a CVD single crystal diamond is tested at various beamlines covering an x-ray photon energy range of 200eV to 28 keV. The nUNCD has much lower x-ray absorption than metal contacts and is designed to improve the performance of our device. The responsivity of nUNCD diamond x-ray detector is compared with the conventional platinum coated diamond x-ray beam position monitor and the results are presented in this paper. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWI052 | ||
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| TUPWA004 | Operator Roles at the Australian Synchrotron | operation, synchrotron, controls, storage-ring | 1397 |
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| The Accelerator Operators at the Australian Synchrotron undertake a wide variety of critical functions as part of their regular duties. In addition to normal Control Room duties, they play a major Role in Machine Physics, provide after hours support for Users on Beamlines and contribute extensively to the Controls and Database Development across the facility. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPWA004 | ||
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| TUPTY033 | Civil Engineering Optimisation Tool for the Study of CERN's Future Circular Colliders | collider, alignment, civil-engineering, hadron | 2079 |
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Funding: CERN The feasibility of Future Circular Colliders (FCC), possible successors to the Large Hadron Collider (LHC), is currently under investigation at CERN. This paper describes how CERN’s civil engineering team are utilising an interactive tool containing a 3D geological model of the Geneva basin. This tool will be used to investigate the optimal position of the proposed 80km-100km tunnel. The benefits of using digital modelling during the feasibility stage are discussed and some early results of the process are presented. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPTY033 | ||
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| TUPTY043 | Analysis of Intensity-dependent Effects on LHC Transverse Tunes at Injection Energy | injection, operation, damping, quadrupole | 2108 |
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| The LHC Run I has provided a huge amount of data that can be used to deepen the understanding of the beam behaviour. In this paper the focus is on the analysis of transverse tunes at injection energy to detect signs of intensity-dependent effects. BPM data, recording the injection oscillations of the operational beams during the ring-filling phase, have been analysed in detail to enable extracting useful information about the tune shift vs. injected beam intensity. The data processing and the results are discussed in detail, including also possible implications for future operation. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPTY043 | ||
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| WEPTY057 | Adaptable Machine Protection Architecture for CW, High Intensity Accelerators | operation, framework, network, real-time | 3402 |
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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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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY057 | ||
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