01 Overview and Commissioning of Facilities
Paper Title Page
MOOA01
 Accelerator Projects at DESY  
 
  • R. Brinkmann
    DESY, Hamburg, Germany
  
  DESY is one of the worldwide leading accelerator laboratories. At present we operate the synchrotron radiation storage rings DORIS and PETRA-III and the superconducting linac soft X-ray free electron laser facility FLASH. DESY is a major partner for the construction of the European XFEL project and coordinator of the international consortium which builds the accelerator complex. In this talk, after a brief general introduction to the laboratory, an overview of DESY’s activities in the area of accelerator operation, construction and R&D will be given.  
slides icon Slides MOOA01 [9.054 MB]  
 
MOOA02 Beam Instrumentation for X-ray FELs 1
 
  • H. Loos
    SLAC, Menlo Park, California, USA
  
  Funding: This work was supported by U.S. Department of Energy, Office of Basic Energy Sciences, under Contract DE-AC03-76SF00515.
The performance of X-ray Free-electron lasers depends strongly on the achieved quality of the high brightness electron beam and its shot by shot stability. The requirements and challenges of the instrumentation needed to tune and optimize such electron beams will be discussed. Of particular interest are measurements of the beam orbit, emittance, energy, and bunch length and the different measurement techniques for these transverse and longitudinal beam parameters and their implementation for routine operation will be addressed in detail, particularly the necessary instrumentation to fulfill different user requirements in terms of beam energy and bunch length. Specific requirements for the initial commissioning, routine optimization and feedback applications will be presented as well. 		 
slides icon Slides MOOA02 [2.114 MB]  
 
MOPD01 Beam Diagnostics for the NSLS-II Booster 29
 
  • V.V. Smaluk
    BINP, Novosibirsk, Russia
  • E.A. Bekhtenev, V.P. Cherepanov, G.V. Karpov, V. Kuzminykh, O.I. Meshkov
    BINP SB RAS, Novosibirsk, Russia
  • I. Pinayev, O. Singh, K. Vetter
    BNL, Upton, Long Island, New York, USA
  
  For successful commissioning and effective operation of the projected NSLS-II Booster, a set of beam diagnostic instruments has been designed. Fluorescent screens are used for the Booster commissioning and troubleshooting. Closed orbit is measured using electrostatic BPMs with turn-by-turn capability. The circulating current and beam lifetime are measured using a DC current transformer. The fill pattern is monitored by a fast current transformer. Visible synchrotron radiation is registered for observation of the beam image. Betatron tunes are measured using two pairs of striplines, the first pair is for beam excitation and the second one – for beam response measurement. Design and performance of the Booster beam instrumentation are described.  
 
MOPD02 The CNAO Qualification Monitor 32
 
  • C. Viviani, G. Balbinot, J. Bosser, M. Caldara, H. Caracciolo, M.A. Garella, V. Lante, A. Parravicini, M. Pullia
    CNAO Foundation, Milan, Italy
  
  The CNAO (Centro Nazionale di Adroterapia Oncologica) Foundation is the first Italian center for deep hadrontherapy. It will treat patients using Protons and Carbon ions in the next coming months. Patient safety is the first priority and many diagnostics devices have been developed to guarantee it. This work presents the so-called Qualification Monitor (QM). It is mounted in the common part of the four extraction lines, in front of the Chopper Dump, and it aims to qualify the extracted beam profile and intensity, before sending it to the treatment rooms. It is made of two different detectors: the first one, called Qualification Profile Monitor (QPM), is made by two dimensional harp of scintillating fibers to measure horizontal and vertical profiles. The second one, named Qualification Intensity Monitor (QIM) is a scintillating plate for intensity measurement. At the beginning of each extracted spill the beam is dumped on the Chopper Dump and it hit the QM. Only a positive result from beam qualification allows to switch on Chopper magnets and to send the beam to the patient. The QM is working with beam from some months, first results and future upgrades are presented.  
 
MOPD03 The Beam Safety System of the PSI UCN Source 35
 
  • D. Reggiani, B. Blarer, P.-A. Duperrex, G. Dzieglewski, F. Heinrich, A.C. Mezger, U. Rohrer, K. Thomsen, M. Wohlmuther
    PSI, Villigen, Switzerland
  
  At PSI, a new and very intensive Ultra-Cold Neutron (UCN) source based on the spallation principle was commissioned in December 2010 and will start production in 2011. From then on, two neutron spallation sources, the continuous wave SINQ and the macro-pulsed UCN source, both furnished with a solid state target, will be operating concurrently at PSI. The 590 MeV, 1.3 MW proton beam will be switched towards the new spallation target for about 8 s every 800 s. Safe operation of the UCN source is guaranteed by two independent interlock systems. In fact, beside the well established accelerator protection system, a new fast interlock system has been designed following the experience gathered with the MEGAPIE (Megawatt Pilot Target Experiment) project. The goal of this additional system is to preserve the UCN target and the complete beam line installation by ensuring correct beam settings and, at the same time, to avoid any accidental release of radioactive material. After a brief introduction of the PSI UCN source, this paper will focus on the motivations as well as the principle of operation of the UCN beam safety system.  
poster icon Poster MOPD03 [3.046 MB]  
 
MOPD04 RHIC Electron Lens Test Bench Diagnostics 38
 
  • D.M. Gassner, E.N. Beebe, W. Fischer, X. Gu, K. Hamdi, J. Hock, C. Liu, T.A. Miller, A.I. Pikin, P. Thieberger
    BNL, Upton, Long Island, New York, USA
  
  An Electron Lens system will be installed in RHIC to increase luminosity by counteracting the head-on beam-beam interaction. The proton beam collisions at the two experimental locations will introduce a tune spread due to a difference of tune shifts between small and large amplitude particles. A low energy electron beam will be used to improve luminosity and lifetime of the colliding beams by reducing the betatron tune shift and spread. In preparation for the Electron Lens installation next year, a test bench facility will be used to gain experience with all sub-systems. This paper will discuss the diagnostics related to measuring the electron beam parameters.  
 
MOPD05 Beam Diagnostic Layout for SIS100 at FAIR 41
 
  • M. Schwickert, P. Forck, T. Hoffmann, P. Kowina, H. Reeg
    GSI, Darmstadt, Germany
  
  The SIS100 heavy ion synchrotron will be the central machine of the FAIR (Facility for Antiprotons and Ions Research) project currently designed at GSI. The unique features of SIS100, like e.g. the acceleration of high intensity beams of 2.5·1013 protons and 5·1011 Uranium ions near the space charge limit, the anticipated large tune spread, extreme UHV conditions of the cryogenic system for superconducting magnets and fast ramp rates of 4 T/s, make challenging demands on the beam diagnostic components. This contribution describes the conceptual design for SIS100 beam diagnostics and reports on the present status of prototype studies. Exemplarily the progress concerning beam position monitors, beam current transformers and beam-loss monitors is presented.  
 
MOPD06 Capabilities and Performance of the LHC Schottky Monitors 44
 
  • M. Favier, T.B. Bogey, F. Caspers, O.R. Jones
    CERN, Geneva, Switzerland
  • J. Cai, E.S.M. McCrory, R.J. Pasquinelli
    Fermilab, Batavia, USA
  • A. Jansson
    ESS, Lund, Sweden
  
  The LHC Schottky system has been under commissioning since summer 2010. This non destructive observation relies on a slotted waveguide structure resonating at 4.8GHz. Four monitors, one for each plane of the two counter-rotating LHC beams, are used to measure the transverse Schottky sidebands Electronic gating allows selective bunch-by-bunch measurements, while a triple down-mixing scheme combined with heavy filtering gives an instantaneous dynamic range of over 100dB within a 20kHz bandwidth. Observations of both proton and lead ion Schottky spectra will be discussed along with a comparison of predicted and measured performance.  
poster icon Poster MOPD06 [3.484 MB]  
 
MOPD07 Newly Installed Beam Diagnostics at the Australian Synchrotron 47
 
  • E.D. van Garderen, M.J. Boland, G. LeBlanc, B. Mountford, A. Rhyder, A. C. Starritt, A. Walsh, K. Zingre
    ASCo, Clayton, Victoria, Australia
  
  The Australian Synchrotron (AS) is aiming at implementing Top-Up operations in 2012. To reduce costs only one of the two klystrons in the linac will be used. The electron beam in the linac will only be accelerated to 80 MeV, instead of 100 MeV achieved currently. The injection system will need to be recommissioned. The beam position monitors in the booster have been upgraded and YAG:Ce screens have been added to the booster-to-storage ring (BTS) transfer line. In addition the injection efficiency will be optimized and monitored. For this purpose another Fast Current Transformer has also been installed at the end of the BTS.  
 
MOPD08 Beam Diagnostics in the J-PARC Linac for ACS Upgrade 50
 
  • A. Miura, S. Sato
    JAEA/J-PARC, Tokai-mura, Japan
  • Z. Igarashi, M. Ikegami, T. Miyao, T. Toyama
    KEK, Ibaraki, Japan
  • T. Tomisawa
    JAEA/LINAC, Ibaraki-ken, Japan
  
  J-PARC had developed the beam diagnostic devices for the current J-PARC linac and has used them since the operation start. J-PARC linac began the energy upgrade project since 2009 and 21 ACS cavities will be installed. In this project, many cavities and related devices are newly installed in the ACS section and its downstream part. Because the beam parameters are updated, new beam diagnostic devices are fabricated and current diagnostic devices are developed. Beam position monitors (BPM) are newly designed and fabricated, based on the computer simulation and bench test. Because the gas proportional BLMs as the current BLM are sensitive to background noise of X-ray emitted from RF cavities, it is difficult to recognize real beam loss. We need to subtract an X-ray noise from the signal from BLM, another candidate BLMs have been tried to measure the beam loss. In addition, the bunch shape monitor for the longitudinal tuning has been developed in the corroboration with the institute for nuclear research, Russia. In this paper, we describe the new developed devices and their development process, especially for beam loss monitor and the developing bunch shape monitor.  
 
MOPD09 Electron Beam Diagnostics for FLASH II 53
 
  • N. Baboi, D. Nölle
    DESY, Hamburg, Germany
  
  Up to now, the FLASH linac serves one SASE (Self-Amplified Spontaneous Emission) undulator. The radiation produced can be guided to one of 5 beamlines in the experimental hall. In order to increase the availability of the machine, an extension, FLASH II, will be built in the next few years. A second undulator section will be built to generate SASE light. A HHG (High Harmonic Generation) laser will alternatively be used to produce seeded radiation in the undulators. The electron beam diagnostics in FLASH II has to enable the precise control of the beam position, size, timing, as well as the overlap of the electron beam with the HHG laser. The losses have to be kept under control, and the beam has to terminate safely in the beam dump. In comparison to FLASH, which was designed to run with rather high charge, the dynamic range of the diagnostics has to be between 0.1 to 1 nC, similar to the European XFEL. This paper gives an overview of the diagnostics for FLASH II.  
 
MOPD40 Beam Measurements with Visible Synchrotron Light at VEPP-2000 Collider 140
 
  • Yu. A. Rogovsky, D.E. Berkaev, I. Koop, A.N. Kyrpotin, I. Nesterenko, A.L. Romanov, Y.M. Shatunov, D.B. Shwartz
    BINP SB RAS, Novosibirsk, Russia
  
  This paper describes beam diagnostics at VEPP-2000 collider, based on visible synchrotron light analysis. These beam instruments include: SR beamline and optics; acquisition tools and high resolution CCD cameras distributed around the storage ring to measure the transverse beam profile and its position in vacuum chamber; photomultiplier tubes (PMT) which enables beam current measurements. Some applications of these measurement systems and their measurement results are presented.  
poster icon Poster MOPD40 [0.599 MB]  
 
MOPD85 Beam Emittance Studies at the Heavy Ion Linac UNILAC 245
 
  • P. Gerhard, W.A. Barth, L.A. Dahl, L. Groening, H. Vormann
    GSI, Darmstadt, Germany
  
  New accelerating structures for the UNILAC at GSI were commissioned in the last two years [1, 2], and major machine upgrades in order to meet the requirements for FAIR are in preparation [3, 4]. Beam emittance is one of the key beam parameters that are essential for any beam dynamics calculation, for the design of new accelerators as well as verification or investigation of existing machines. Its measurement is intricate and often time consuming. Extensive emittance measurements went along with the commissionings and were conducted to provide a reliable basis for beam dynamics simulations. In addition to the 10 permanent transverse emittance measurement devices installed all over the UNILAC, two "mobile" devices had been built and mounted at four different sites in the UNILAC. This work shows the standard slid-grid device used for transverse beam emittance measurements and gives an overview of the activities and results. The following topics will be presented with respect to design studies and simulations: Emittance growth of high current ion beams along the UNILAC, stripping, and resonance effects.
[1] H. Vormann et al., LINAC10, MOP040
[2] P. Gerhard et al., IPAC10, MOPD028
[3] W. Barth et al., PAC09, FR5REP059
[4] S. Mickat et al., LINAC10, MOP042 		 
poster icon Poster MOPD85 [10.077 MB]  
 
TUOA01 Beam Instrumentation in J-PARC 275
 
  • T. Toyama
    J-PARC, KEK & JAEA, Ibaraki-ken, Japan
  
  The talk will summarize the beam instrumentation at J-PARC with a focus on MW class proton beams. The measurements of beam intensities, positions, losses, profiles, and halos at each stage of accelerator, 181 MeV LINAC (to be upgraded to 400MeV), 3 GeV RCS and 50 (30 as phase I) GeV MR will be reported. Present status, including modification and improvement of instrumentations to meet with LINAC energy upgrade and a future plan will be reported with emphasis on high beam power related issues such as radiation hardness (mechanically and electrically), beam coupling impedance, etc..  
slides icon Slides TUOA01 [22.777 MB]  
 
TUOA02 Diagnostics during the ALBA Storage Ring Commissioning 280
 
  • U. Iriso, M. Alvarez, F.F.B. Fernandez, A. Olmos, F. Pérez
    CELLS-ALBA Synchrotron, Cerdanyola del Vallès, Spain
  
  The ALBA Storage Ring is a 3GeV 3rd Generation Synchrotron Light Source whose 1st phase commissioning took place in Spring 2011. The machine is equipped with 123 BPMs, striplines, several fluorescent screens, FCT and DCCT, 128 BLMs, and two front ends strictly used for electron beam diagnostics (pinhole and streak camera). This paper presents an overview of the Diagnostics elements installed in the machine and our experience during the commissioning.  
slides icon Slides TUOA02 [5.476 MB]  
 
TUOA03 The Fermilab HINS Test Facility and Beam Measurements of the Ion Source and 325 MHz RFQ 283
 
  • V.E. Scarpine, S. Chaurize, B.M. Hanna, S. Hays, J. Steimel, R.C. Webber, D. Wildman
    Fermilab, Batavia, USA
  
  Funding: This work was supported by the U.S. Department of Energy under contract No. DE-AC02-07CH11359.
The Fermilab High Intensity Neutrino Source (HINS) project is intended to test new concepts for low-energy, high-intensity superconducting linacs. HINS initial design consists of a 50 KeV ion source, a 2.5 MeV Radiofrequency Quadrupole (RFQ) followed by room temperature and superconducting spoke resonator acceleration sections. At present, a proton ion source and the 325 MHz RFQ, followed by a beam diagnostics section, have been operated with beam. This paper will present the beam measurement results for the proton ion source and for the 325 MHz RFQ module. In addition, this paper will discuss the role of HINS as a test facility for the development of beam diagnostic instrumentation required for future high-intensity linacs. 		 
slides icon Slides TUOA03 [1.864 MB]  
 
TUPD02 Beam Diagnostics for the ESS 302
 
  • A. Jansson, L. Tchelidze
    ESS, Lund, Sweden
  
  The European Spallation Source (ESS) is a based on a 2.5GeV superconducting linac, producing a 5MW beam. Since it is optimized for cold neutrons, there is no accumulator ring, and hence no need for change exchange injection. Therefore, unlike most other proposed MW-class linacs, the ESS linac will accelerate protons rather than H− ions. This poses a particular challenge for beam size mesurements in the superconducting section. This paper discusses the ESS beam diagnostics requirements, along with some possible instrument design options.  
 
TUPD03 Beam Profile Measurement during Top-up Injection with a Pulsed Sextupole Magnet 305
 
  • R. Takai, K. Harada, T. Honda, Y. Kobayashi, S. Nagahashi, N. Nakamura, T. Obina, A. Ueda
    KEK, Ibaraki, Japan
  • H. Takaki
    ISSP/SRL, Chiba, Japan
  
  A beam injection scheme using a pulsed multipole magnet is suitable for the top-up injection because a disturbance to the stored beam is much smaller than that of the conventional scheme using several kicker magnets. At the Photon Factory storage ring, the top-up injection with a pulsed sextupole magnet (PSM) has been used for the user operation since January 2011. In order to ascertain the effect of the PSM injection, we measured turn-by-turn stored beam profiles following the injection kick by using a fast-gated camera. As a result, it was demonstrated that the PSM injection dramatically decreases not only the coherent dipole oscillation but also the beam profile modulation, as expected from the beam tracking simulation.  
 
TUPD04 Diagnostics for the 150 MeV Linac and Test Transport Line of Taiwan Photon Source 308
 
  • C.-Y. Liao, Y.-T. Chang, J. Chen, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, S.Y. Hsu, K.H. Hu, C.H. Kuo, D. Lee, K.-K. Lin, K.L. Tsai, C.Y. Wu
    NSRRC, Hsinchu, Taiwan
  
  The TPS 150 MeV linac is in installation and commissioning phase at the test site for acceptance test. The linac will move to the final installation site after the building complete which is expected in 2012. The linac and a short transport line for main parameters measurement equips with several types of diagnostic devices, which include screen monitors, fast current transformers, integrated current transformer, wall current monitors, beam position monitors and Faraday cups. These devices are arranged to measure the specification parameters such as charge in bunch train, pulse purity, energy, energy spread, and emittance. Implementation details and preliminary test results will be summarized in this report.  
 
TUPD05 Diagnostic Scheme for the HITRAP Decelerator 311
 
  • G. Vorobjev, C.A. Andre, W.A. Barth, E. Berdermann, M.I. Ciobanu, G. Clemente, L.A. Dahl, P. Forck, P. Gerhard, R. Haseitl, F. Herfurth, M. Kaiser, W. Kaufmann, H.J. Kluge, N. Kotovski, C. Kozhuharov, M.T. Maier, W. Quint, A. Reiter, A. Sokolov, T. Stöhlker
    GSI, Darmstadt, Germany
  • O.K. Kester, J. Pfister, U. Ratzinger, A. Schempp
    IAP, Frankfurt am Main, Germany
  
  The HITRAP linear decelerator currently being set up at GSI will provide slow, few keV/u highly charged ions for atomic physics experiments. The expected beam intensity is up to 105 ions per shot. To optimize phase and amplitude of the RF systems intensity, bunch length and kinetic energy of the particles need to be monitored. The bunch length that we need to fit is about 2 ns, which is typically measured by capacitive pickups. However, they do not work for the low beam intensities that we face. We investigated the bunch length with a fast CVD diamond detector working in single particle counting mode. Averaging over 8 shots yields a clear, regular picture of the bunched beam. Energy measurements by capacitive pickups are limited by the presence of intense primary and partially decelerated beam and hence make tuning of the IH-structure impossible. The energy of the decelerated fraction of the beam behind the first deceleration cavity was determined to about 10 % accuracy with a permanent dipole magnet combined with a MCP. Better detector calibration should help reaching the required 1%. Design of the detectors as well as the results of the measurements will be presented.  
 
TUPD06 Beam Diagnostic Overview of the SPIRAL2 RNB Section 314
 
  • C. Jamet, T. André, E. Guéroult, B. Jacquot, N. Renoux, A. Savalle, T. Signoret, F. Varenne, J.L. Vignet
    GANIL, Caen, France
  • J.-M. Fontbonne
    LPC, Caen, France
  
  An extension to the existing GANIL facility in Caen, France is under construction. The new SPIRAL 2 construction will be realized in two phases, for the first phase the construction started in January 2011 and will consists of the accelerator buildings with two experimental facilities S3 and Neutrons for science (NFS). The second phase is the so called production building where radioactive ions are produced through the ISOL (Isotope Separation On Line) method. The produced radioactive ion beams (RIBs) will be extracted and accelerated up to 60keV from the ion sources, after beam purification the beam will be driven in the secondary beam lines either to a new experimental facility DESIR (Decay, excitation and storage of radioactive ions) constructed during the second phase of the new installation or the RIBs will be charge breed to form multi-charged ions that will be driven to the existing GANIL facility and post accelerated in the CIME cyclotron. This overview article gives a description of the secondary beam lines, the foreseen beam diagnostics which will allow tuning and controlling the radioactive ion beams in the secondary beam lines constructed in the SPIRAL2 Phase 2.  
 
TUPD07 Instrumentation Needs and Solutions for the Development of an SRF Photoelectron Injector at the Energy-Recovery Linac BERLinPro 317
 
  • R. Barday, T. Kamps, A. Neumann, J. Rudolph, S.G. Schubert, J. Völker
    HZB, Berlin, Germany
  • A. Ferrarotto, T. Weis
    DELTA, Dortmund, Germany
  
  BERLinPro is an energy-recovery linac for an electron beam with 1 mm mrad normalized emittance and 100 mA average current. The initial beam parameters are determined by the performance of the electron source, an SRF photo-electron injector. Development of this source is a major part of the BERLinPro programme. The instrumentation for the first stage of the programme serves the purpose to have robust and reliable monitors for fundamental beam parameters like emittance, bunch charge, energy and energy spread. The critical issue of the second stage is the generation of an electron beam with 100 mA average current and a normalized emittance of 1 mm mrad. Therefore we plan to setup a dedicated instrumentation beamline with a compact DC gun to measure thermal emittance, current and current lifetime. In parallel an SRF gun with dedicated diagnostics will be build focused on ERL specific aspects like emittance compensation with low-energy beams and reliability of high current operation. This paper collects requirements for each development stage and discusses solutions to specific measurement problems.  
 
WEOD02 LHC Beam Diagnostics - the Users Point of View 580
 
  • J. Wenninger
    CERN, Geneva, Switzerland
  
  The LHC started up with beam in November 2009, and within less then on year its luminosity reached 2·1032 cm-2s−1 at 3.5 TeV in October 2010. A few weeks later, in November 2010, lead ion collisions were established within little over 2 days. The fast progress and successes of the LHC commissioning and early operation would not have been possible without the excellent performance of its beam instrumentation. All essential instruments worked from the first day or were commissioned in a very short time, providing rapid diagnostics for the beam parameters. Tune and orbit feedbacks that rely on high quality measurements were used early on to achieve smooth operation with minimal beam losses. This presentation will address the performance of the LHC beam instrumentation, in particular the very large beam position and beam loss monitoring systems, both composed of many thousand channels. Present limitations and future improvements will also be discussed.  
slides icon Slides WEOD02 [11.950 MB]