Keyword: LLRF
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TUAPL01 MicroTCA Generic Data Acquisition Systems at ESS ion, controls, FPGA, interface 118
  • S. Farina, J.H. Lee, J.P.S. Martins, D.P. Piso
    ESS, Lund, Sweden
  The European Spallation Source (ESS) is a Partnership of 17 European Nations committed to the goal of collectively building and operating the world's leading facility for research by use of neutrons by the second quarter of the 21st Century. The strive for innovation and the challenges that need to be overcome in order to achieve the requested performances pushed towards the adoption of one of the newest standards available on the market. ESS has decided to use MicroTCA as standard platform for the systems that require high data throughput and high uptime. The implications of this choice on the architecture of the systems will be described with emphasis on the data acquisition electronics.  
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TUPHA117 Upgrade of the LLRF Control System at LNL ion, controls, cavity, FPGA 678
  • D. Bortolato, F. Gelain, D. Marcato, E. Munaron, S. Pavinato, D. Pedretti
    INFN/LNL, Legnaro (PD), Italy
  • M.A. Bellato, R. Isocrate
    INFN- Sez. di Padova, Padova, Italy
  For the SPES project at Legnaro National Laboratories (LNL), a Low-Level Radio Frequency (LLRF) has been designed to have flexibility, reusability and an high precision. It is an FPGA-based digital feedback control system using RF ADCs for the direct undersampling and it can control at the same time eight different cavities. The LLRF system was tested on the field with an accelerated beam. In the last year some improvements on the firmware, software and hardware of the control system have been done. In this paper the results carried out in the more recent tests, the future works and the upgrades of the system will be detailed.  
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TUPHA148 Next Generation Control System Using the EtherCAT Technology ion, controls, undulator, power-supply 751
  • M. Ishii, Y. Ishizawa, M.T. Takeuchi
    JASRI/SPring-8, Hyogo-ken, Japan
  • T. Fukui
    RIKEN SPring-8 Center, Innovative Light Sources Division, Hyogo, Japan
  Toward the SPring-8 upgrade, which we call SPring-8-II, new innovative technologies are introduced at a control framework, a platform, and a fieldbus. We adopted EtherCAT having a master/slave topology as a network based fieldbus. Since a cyclic data transfer time is less than 1msec, EtherCAT can be provided enough performance for a fast control and a feedback system. Synchronization between slaves can be realized easily by the distributed clock technology. Controllers and sensors are set near equipment, and input and output data to/from a master via an Ethernet cable. It reduces the number of wires and the working time for wiring. In 2016, we installed EtherCAT into three types of equipment control systems. One was a prototype digital LLRF system in the high power rf test stand at SPring-8. Another was sub-encoder readout for an undulator at SPring-8. The other was a control system for a kicker magnet power supply at SACLA. An XMC typed EtherCAT Master module was implemented into each of these systems and connected to multi vendor slaves. In this paper, we report the status of new control system using the EtherCAT technology and future plan.  
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THMPA04 RF-Energy Management for the European XFEL ion, FEL, operation, linac 1312
  • O. Hensler
    DESY, Hamburg, Germany
  The European XFEL is in its commissioning phase at this time. One of the major tasks is to bring up all the 25 installed RF-stations, which will allow for beam energy of up to 17.5GeV. It is expected, that a klystron may fail every 1-2 month. The accelerator is designed at the moment with an energy overhead corresponding to 2-3 RF-station, as the last 4 accelerating modules will be installed in a later stage. This will allow recovering the missing energy with the other functioning RF-stations to keep downtime as short as possible in the order of seconds. The concept and corresponding High-Level software accomplishing this task will be presented in this paper.  
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THPHA002 SLAC LCLS-II Injector Source Controls and Early Injector Commissioning ion, controls, gun, MMI 1340
  • D. Rogind, M. Boyes, H. Shoaee
    SLAC, Menlo Park, California, USA
  LCLS-II is a superconducting upgrade to the existing Linear Coherent Light Source at SLAC with a continuous wave beam rate of up to 1 MHz. Construction is underway with first light planned for 2020. The LCLS-II Injector section that comprises low energy from the gun up to the location of the first cryomodule is based on the LBNL Advanced Photo-Injector Experiment (APEX), and is being provided by LBNL. In 2015, responsibility for controls design and fabrication was transferred to SLAC from LBNL to promote commonality with the rest of the LCLS-II control subsystems. Collaboration between the LBNL APEX controls community and SLAC LCSL-II controls team proved vital in advancing the controls architecture toward standardized implementations integrated with the rest of LCLS-II. An added challenge was a decision to commission the injector ~1.5 years ahead of the rest of the machine, in FY 2018. This early injector commissioning (EIC) is embraced as an opportunity to gain valuable experience with the majority of the LCLS-II controls, especially the 1MHz high performance subsystems (HPS), prior to first light.  
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THPHA053 Status of the LIPAc MEBT Local Control System ion, controls, PLC, vacuum 1489
  • E. Molina Marinas, A. Guirao, L.M. Martinez Fresno, I. Podadera, V. Villamayor
    CIEMAT, Madrid, Spain
  • A. Marqueta
    IFMIF/EVEDA, Rokkasho, Japan
  Funding: This work has been partially supported by Spanish government (MINECO) in the frame of the BA Agreement Activities, and (MICINN) under project AIC-A-2011-0654 and FIS2013-40860-R
The Linear Ifmif Prototype Accelerator (LIPAc), is being commissioned in Rokkasho, Japan. The Medium Energy Beam Transport (MEBT) line has already been installed and connected to the ancillary systems, while the mechanical connections to the adjacent systems, the Radio Frequency Quadrupole (RFQ) and the Diagnostics Plate (DP), are under way. The status of the MEBT Local Control System (LCS) was presented in the previous edition of ICALEPCS [*]. Since then, the functional specifications of the MEBT components controls have been completed, the control cabinets have been designed and are now being installed and the software has been written. In this paper, the final architecture and functionality of the MEBT LCS will be described and the preliminary results of its commissioning will be presented.
[*]MEBT and D-Plate Control System Status of the Linear IFMIF Prototype Accelerator. J.Calvo et al. ICALEPCS 2015
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THPHA081 LO Board for 704.42 MHz Cavity Simulator for ESS ion, cavity, controls, ion-source 1573
  • I. Rutkowski, K. Czuba, M.G. Grzegrzolka
    Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland
  Funding: Work supported by Polish Ministry of Science and Higher Education, decision number DIR/WK/2016/03
This paper describes the requirements, architecture, and measurements results of the local oscillator (LO) board prototype. The design will provide low phase noise clock and heterodyne signals for the 704.42 MHz Cavity Simulator for the European Spallation Source. A field detection has critical influence on the simulation's performance and its quality depends on the quality of the two aforementioned signals. The clock frequency is a subharmonic of the reference frequency and choice of the frequency divider generating the clock signals is discussed. The performance of selected dividers was compared. The LO frequency must be synthesized and frequency synthesis schemes are investigated. Critical components used in the direct analog scheme are identified and their selection criteria were given.
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THPHA123 Concept of Cavity Simulator for European Spallation Source ion, cavity, controls, FPGA 1666
  • M.G. Grzegrzolka, K. Czuba, I. Rutkowski
    Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland
  At the European Spallation Source it is foreseen to use around 120 superconducting cavities operating at 704.42 MHz. Each cavity will require an individual LLRF control system, that needs to be tested before the installation inside the accelerator. Testing of all systems using the real superconducting cavities would be very expensive and in case of a failure can lead to serious damages. To lower the testing cost and avoid potential risks it is planned to design and build a device that simulates the behavior of a superconducting cavity. The cavity simulator will utilize fast data converters equipped with an RF front-end and a digital signal processing unit based on a high performance FPGA. In this paper conceptual design of hardware and firmware will be presented.  
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THPHA130 Control and Interlock Systems for the LIGHT Prototype ion, controls, interface, hardware 1683
  • R. Moser, M. Cerv, S. Magnoni, H. Pavetits, P. Paz Neira, K. Stachyra
    ADAM SA, Geneva, Switzerland
  LIGHT (Linac Image Guided Hadron Technology) is a particle therapy system* developed by Advanced Oncotherapy plc. Accelerator, control and interlock systems are developed by its subsidiary A.D.A.M.SA, a CERN spin-off. The system is being designed to accelerate protons up to 230 MeV using a modular and compact 25-meter-long linear accelerator. It is being designed to operate in pulsed mode where beam properties (energy, pulse charge and spot size) can be changed at 200 Hz. A proof-of-concept accelerator is being assembled and tested at CERN (Geneva, Switzerland). Control and interlock systems are developed using an exploratory prototyping approach and COTS hardware. Requirements for the final LIGHT control and interlock systems are iteratively clarified through creation and refinement of these prototypes. We will continue to support the proof-of-concept accelerator activities while starting to design the final LIGHT control and interlock systems in parallel, building upon the knowledge acquired with the proof-of-concept accelerator. The matured final LIGHT control and interlock systems will gradually replace the prototypes to automate procedures and test the system before deployment
* The LIGHT Proton Therapy System is still subject to conformity assessment by AVO's Notified Body as well as clearance by the USA-FDA
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THPHA166 Control System Integration of a MicroTCA.4 Based Digital LLRF Using the ChimeraTK OPC UA Adapter ion, controls, operation, PLC 1811
  • R. Steinbrück, M. Kuntzsch, P. Michel
    HZDR, Dresden, Germany
  • M. Hierholzer, M. Killenberg, H. Schlarb
    DESY, Hamburg, Germany
  • C.P. Iatrou, J. Rahm, L. Urbas
    TU Dresden, Dresden, Germany
  The superconducting linear electron accelerator ELBE at Helmholtz-Zentrum Dresden-Rossendorf is a versatile light source. It operates in continuous wave (CW) mode to provide a high average beam current. To fulfil the requirements for future high resolution experiments the analogue low level radio frequency control (LLRF) is currently replaced by a digital μTCA.4 based LLRF developed at DESY, Hamburg. Operation and parametrization is realized by a server application implemented by DESY using the ChimeraTK software framework. To interface the WinCC 7.3 based ELBE control system an OPC UA Adapter for ChimeraTK has been developed in cooperation with DESY and Technische Universität Dresden (TUD). The poster gives an overview of the collaborating parties, the variable mapping scheme used to represent LLRF data in the OPC UA server address space and integration experiences with different industrial OPC UA Clients like WinCC 7.3 and LabVIEW.  
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THSH202 Design and Implementation of the LLRF System for LCLS-II ion, cavity, controls, cryomodule 1969
  • C. Serrano, K.S. Campbell, L.R. Doolittle, Q. Du, G. Huang, J.A. Jones, V.K. Vytla
    LBNL, Berkeley, California, USA
  • S. Babel, A.L. Benwell, M. Boyes, G.W. Brown, D. Cha, J.H. De Long, J.A. Diaz Cruz, D.B. Greg, B. Hong, R.S. Kelly, A.L. McCollough, M. Petree, A. Ratti, C.H. Rivetta
    SLAC, Menlo Park, California, USA
  • R. Bachimanchi, C. Hovater, D.J. Seidman
    JLab, Newport News, Virginia, USA
  • B.E. Chase, E. Cullerton, J. Einstein, J.P. Holzbauer, D.W. Klepec, Y.M. Pischalnikov, W. Schappert
    Fermilab, Batavia, Illinois, USA
  Funding: This work was supported by the LCLS-II Project and the U.S. Department of Energy, Contract n. DE-AC02-76SF00515
The SLAC National Accelerator Laboratory is building LCLS-II, a new 4 GeV CW superconducting (SCRF) linac as a major upgrade of the existing LCLS. The SCRF linac consists of 35 ILC style cryomodules (eight cavities each) for a total of 280 cavities. Expected cavity gradients are 16 MV/m with a loaded QL of ~ 4 x 107. Each individual RF cavity will be powered by one 3.8 kW solid state amplifier. To ensure optimum field stability a single source single cavity control system has been chosen. It consists of a precision four channel cavity receiver and two RF stations (Forward, Reflected and Drive signals) each controlling two cavities. In order to regulate the resonant frequency variations of the cavities due to He pressure, the tuning of each cavity is controlled by a Piezo actuator and a slow stepper motor. In addition the system (LLRF-amplifier-cavity) was modeled and cavity microphonic testing has started. This paper will describe the main system elements as well as test results on LCLS-II cryomodules.
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