Keyword: instrumentation
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TUPC123 Evaluation of New Generation Heavy Particle Beam Diagnostics Instrumentation hadron, single-bunch, diagnostics, controls 1305
 
  • B.B. Baricevic, A. Košiček, J. Menart, M. Znidarcic
    I-Tech, Solkan, Slovenia
 
  Abstract: This paper presents the achievements in the field of heavy particle beam diagnostics instrumentation. Two different instruments are presented: Libera Single Pass H and Libera Hadron, designed for linear and circular heavy particle beam diagnostics applications respectively. Beside high precision beam position measurement application, these instruments offer much more. Accurate beam arrival time measurements, high resolution single bunch position and charge measurements, beam current and fill pattern measurements are performed. The instruments are evaluated through extensive laboratory measurements, on the real beam and on stepper-motor driven test-benches. Libera instruments are network attached devices, developed on uTCA based platform that enables smooth integration of many instruments in the control system network and a simplified implementation of custom signal processing algorithms.  
 
TUPC139 Overview of the CLIC Beam Instrumentation linac, cavity, beam-losses, laser 1350
 
  • T. Lefèvre
    CERN, Geneva, Switzerland
 
  Driven by beam dynamic considerations the Compact Linear Collider (CLIC) is expected to require extremely tight tolerances on most beam parameters. An important milestone was reached in 2011 with the completion of the CLIC conceptual design report. In this context the requirements for CLIC beam instrumentation has been reviewed and studied in detail for the whole accelerator complex with the aim of demonstrating feasibility. A preliminary choice has been made for every CLIC instrument, serving as a baseline scenario for the next phase of the project which will concentrate on the detailed design, engineering and test of CLIC devices. Whenever possible existing solutions have been studied, focusing on any improvements necessary to meet the CLIC performance criteria. When no such devices exists, or if cost considerations come into play, new technologies have been under study. Several prototypes are already well advanced and are currently under test. This paper presents an overview of CLIC beam instrumentation, the possible reach of their performance and an outlook on future developments.  
 
TUPC143 New Techniques in the Synchronization of High-frequency Multichannel Acquisition Systems neutron, controls, background, induction 1359
 
  • R.A.J. Soden, Y.A. Maumary, C. Zaretti
    Agilent Technologies SA, Plan-les-Ouates, Switzerland
  • S.J. Narciso, J.L. Richard
    Agilent Technologies Inc., Loveland, USA
 
  Today, high-speed digitizer systems operating at well above 100 MSa/s are being used in a diverse range of applications including operation of single-pulse linear induction accelerators for flash radiographic facilities, neutron energy measurement through time-of-flight, and propulsion research. A growing number of such applications require simultaneous measurement of high-frequency signals over many channels. Most of today’s high-speed digitizers or oscilloscopes feature a maximum of only four channels. For applications requiring more than four channels, and needing very precise time correlation between channels or accurate phase of continuous signals, it is necessary to synchronize the sampling clocks of the multiple instruments within the system. This paper presents methods of synchronization, with reference to large-scale multichannel data acquisition requirements in particle acceleration applications using modular instrumentation. A range of system architectures are presented, and advantages and disadvantages of each scheme are discussed.  
 
TUPC146 Beam Profiles Analysis for Beam Diagnostic Applications background, synchrotron, diagnostics, synchrotron-radiation 1368
 
  • C.-Y. Liao, J. Chen, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, S.Y. Hsu, K.H. Hu, C.H. Kuo, C.Y. Wu
    NSRRC, Hsinchu, Taiwan
 
  Beam profile and its analysis play an important role in beam diagnostics of a particle accelerator system. Use of destructive screen monitor or non-destructive synchrotron radiation monitor for beam profile measurement is a simple way and has been widely used in synchrotron light source facility. Analyze beam profiles can obtain beam parameters including beam center, σ, and tilt angle which has become a useful tool for beam diagnostic. In this report the comparison of fitting strategies affect the analysis results are studied. The computer simulated beam profiles with different background noise level and conditions are used to evaluate the computing time, and the estimated fitting errors.  
 
TUPC155 Optimisation of the LHC Beam Current Transformers for Accurate Luminosity Determination luminosity, pick-up, monitoring, synchrotron 1395
 
  • J-J. Gras, D. Belohrad, M. Ludwig, P. Odier
    CERN, Geneva, Switzerland
  • C. Barschel
    RWTH, Aachen, Germany
 
  During the 2010 and 2011 LHC runs a series of dedicated fills were used for luminosity calibration measurements at each of the LHC experiments. A major contribution to the final precision of these luminosity calibration campaigns originated from the absolute accuracy of the bunch current population estimation. The importance of these measurements for the LHC physics community triggered a large and fruitful collaboration between the CERN Beam Instrumentation Group and the LHC Experiments to push the LHC Beam Current Transformers performance to their limit. This paper will report on the available instruments for beam current measurements, the methodology used to improve them and the results obtained.  
 
TUPC165 DITANET - Investigations into Accelerator Beam Diagnostics diagnostics, linac, electron, extraction 1422
 
  • C.P. Welsch
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • C.P. Welsch
    The University of Liverpool, Liverpool, United Kingdom
 
  Funding: Work supported by the EU under GA-PITN-215080.
DITANET is a Marie Curie initial training network in beam diagnostics. The network members, universities, research centres and industry partners, are developing diagnostics methods for a wide range of existing or future particle accelerators, both for electron and for ion beams. This is achieved through a cohesive approach that allows for the exploitation of synergies, whilst promoting knowledge exchange between partners. In addition to its broad research program, the network organizes schools and topical workshops for the beam instrumentation and particle accelerator communities. This contribution gives an overview of the Network's research outcomes to date and summarizes past and future training activities.
 
 
TUPS022 MedAustron Beam Vacuum System : From sources to Patient Treatment Rooms vacuum, synchrotron, ion, dipole 1572
 
  • J.M. Jimenez, P. Cruikshank, L. Faisandel, W. Maan
    CERN, Geneva, Switzerland
  • T. Hauser, G. Hulla, P. Landrot, J. Wallner
    EBG MedAustron, Wr. Neustadt, Austria
 
  The MedAustron beam vacuum system is a complex system integrating different technical solutions from the source to the patient treatment rooms. The specified vacuum performances combined with the challenging integration issues require technical compromise which will be presented in this poster. The status of the design of the vacuum system will be reviewed and the pending issues will be explained.  
 
TUPS071 Performance of the Protection System for Superconducting Circuits during LHC Operation radiation, power-supply, extraction, interlocks 1701
 
  • R. Denz, Z. Charifoulline, K. Dahlerup-Petersen, R. Schmidt, A.P. Siemko, J. Steckert
    CERN, Geneva, Switzerland
 
  The protection system for superconducting magnets and bus-bars is an essential part of the LHC machine protection and ensures the integrity of substantial elements of the accelerator. Due to the large amount of hardwired and software interlock channels the dependability of the system is a critical parameter for the successful exploitation of the LHC. The paper will report on observed failure modes, present fault statistics and discuss the overall performance of the protection system during LHC operation in 2010 and 2011. Foreseen measures for further improvements and operational results obtained with already implemented system upgrades will be described.  
 
TUPS093 Automatic Measurement System for Electrical Verification of the LHC Superconducting Circuits pick-up, high-voltage, superconducting-magnet, dipole 1756
 
  • A. Kotarba, M. Bednarek, P. Jurkiewicz, J. Ludwin, M. Talach
    IFJ-PAN, Kraków, Poland
  • R. Mompo
    CERN, Geneva, Switzerland
 
  In the LHC machine, superconducting magnet circuits are used on a very large scale. The circuits, more than 1600, are all equipped with a complex set of instrumentation required for safe operation and diagnostics. The length of many circuits exceed 3 km. Due to risks of accidental damages during transport and assembly or misconnection of the circuits’ auxiliary components, it is necessary to perform an Electrical Quality Assurance (ELQA) campaign after every major intervention on a circuit and also after each thermal cycle of the machine. In order to be able to perform reliable tests on a circuit within a short time frame, a highly extensible automated mobile test system was designed and built. Four of these instruments were successfully used during the Hardware Commissioning phases of the LHC. This paper describes the hardware solutions used in the test system.  
 
TUPS103 High Temperature Radio Frequency Loads simulation, coupling, vacuum, impedance 1783
 
  • S. Federmann, F. Caspers, A. Grudiev, E. Montesinos, I. Syratchev
    CERN, Geneva, Switzerland
 
  In the context of energy saving and recovery requirements the design of reliable and robust RF power loads which permit a high outlet temperature and high pressure of the cooling water is desirable. Cooling water arriving at the outlet with 150 deg C and more than 20 bar has a certain value. Normal RF power loads containing dielectric and sensitive windows usually do not permit going much higher than 50 deg C. Here we present and discuss several design concepts for narrow-band “metal only” RF high power loads. One concept is the application of normal steel corrugated waveguides structures near cutoff .This concept could find practical use above several GHz. Another solution are resonant structures made of normal magnetic steel to be installed in large waveguides for frequencies of 500 MHz or lower. Similar resonant structures above 100 MHz taking advantage the rather high losses of normal steel may also be used in coaxial line geometries with large dimensions.  
 
WEIB03 Emerging New Electronics Standards for Physics controls, status, monitoring, diagnostics 1981
 
  • R.S. Larsen
    SLAC, Menlo Park, California, USA
 
  Funding: Work supported by US Department of Energy Contract DE AC03 76SF00515.
A unique effort is underway between industry and the international physics community to extend the Telecom industry’s Advanced Telecommunications Computing Architecture (ATCA and MicroTCA) to meet future needs of the physics machine and detector community. New standard extensions for physics are being designed to deliver unprecedented performance and high subsystem availability for accelerator controls, instrumentation and data acquisition. A key feature is a unique out-of-band imbedded standard Intelligent Platform Management Interface (IPMI) system to manage hot-swap module replacement and hardware-software failover. An additional goal is to achieve a much higher degree of interoperability of both lab and industry designed hardware-software products than past generations of standards. This presentation will describe status of the hardware-software standards extension plans; technology advantages for machine controls and data acquisition systems; and examples of collaborative efforts to help develop an industry base of generic ATCA and MicroTCA products in an open-source environment.
 
slides icon Slides WEIB03 [3.905 MB]  
 
WEIB05 Collaborative R&D in the Industry of Science neutron, electron, cyclotron, target 1991
 
  • C. Oyon
    ESS, Lund, Sweden
 
  Successful collaborative efforts involve committed partners that have established comforting level of trust. When industry and research laboratories establish such collaborations they create unique ecosystems that have potential to deliver creative solutions. Many times, however, those collaborations face unexpected legal and administrative limitations. The aim of this talk is to identify key limitations and suggest potential solutions that can streamline collaborative projects.  
slides icon Slides WEIB05 [6.937 MB]  
 
WEPS076 Straight Scaling FFAG linac, emittance, vacuum, closed-orbit 2682
 
  • J.-B. Lagrange, Y. Ishi, Y. Kuriyama, Y. Mori, T. Planche, B. Qin, T. Uesugi, E. Yamakawa
    KURRI, Osaka, Japan
  • K. Okabe
    University of Fukui, Faculty of Engineering, Fukui, Japan
  • A. Sardet, R. Wasef
    LPSC, Grenoble Cedex, France
 
  Recent developments in scaling fixed field alternating gradient (FFAG) accelerators have opened new ways for lattice design, with straight sections, and insertions like dispersion suppressors. An experiment to study straight sections and dispersion suppressors is under progress at KURRI.  
 
THPS053 Results from the HiRadMat Primary Beam Line Commissioning beam-losses, optics, proton, controls 3547
 
  • C. Heßler, M. Arruat, J. Bauche, K. Bestmann, J. Blanco, N. Conan, K. Cornelis, I. Efthymiopoulos, H. Gaillard, B. Goddard, D. Grenier, G.G. Gros, A. Habert, L.K. Jensen, V. Kain, G. Le Godec, M. Meddahi, S. Pelletier, P. Pepinster, B. Puccio, C. Theis, P. Trilhe, G. Vandoni, J. Wenninger
    CERN, Geneva, Switzerland
 
  The High Radiation to Materials facility (HiRadMat) is a new experimental area at CERN, for studies of the impact of high-intensity pulsed beams on accelerator components and materials. The beam is delivered from the SPS by a new primary beam line, which has been constructed during the 2010/11 winter technical stop. The paper summarizes the construction phase and describes the results from the beam line commissioning in spring 2011. Beam parameter and aperture measurements are presented, as well as steering tests. A special emphasis has been put on the handling of the exceptionally flexible beam line optics in the control system.  
 
FRXCA01 First Years Experience of LHC Beam Instrumentation feedback, emittance, beam-losses, luminosity 3779
 
  • O.R. Jones
    CERN, Geneva, Switzerland
 
  The LHC is equipped with a full suite of sophisticated beam instrumentation which has been essential for rapid commissioning, the safe increase in total stored beam power and the understanding of machine optics and accelerator physics phenomena. This talk will comment on all of these systems and on their contributions to the various stages of beam commissioning. It will include details on: the beam position system and its use for real-time global orbit feedback; the beam loss system and its role in machine protection; total and bunch by bunch intensity measurements; tune measurement and feedback; synchrotron light diagnostics for transverse beam size measurements, abort gap monitoring and longitudinal density measurements. Issues and problems encountered along the way will also be discussed together with the prospect for future upgrades.  
slides icon Slides FRXCA01 [7.322 MB]