Keyword: instrumentation
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MOIXB1 Welcome to the 2014 International Beam Instrumentation Conference diagnostics, beam-diagnostic 1
 
  • S.R. Smith
    SLAC, Menlo Park, California, USA
 
  The chairperson welcomes participants to Monterey for the 3rd IBIC and opens the conference.  
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TUTUB1 Managing Electromagnetic Interference in Large Instrumentation Environments coupling, impedance, network, shielding 224
 
  • M.E. Gruchalla
    URS, Albuquerque, New Mexico, USA
  • M. Thuot
    LANL, Los Alamos, New Mexico, USA
 
  Funding: Work supported by the US Department of Energy
Implementing high-quality measurement systems in large test environments presents a number of unique challenges. And, these challenges are made even more interesting where new instrumentation systems are being implemented in existing legacy environments where there is little opportunity to modify the infrastructure. Often, Electromagnetic Interference (EMI) is encountered. This interference may be simply an annoyance were sufficiently low that data integrity is not severely compromised, but in many cases, perhaps most, EMI is so severe as to totally obscure the signals of interest. Various sources of EMI and common points of entry of are reviewed. Means of mitigation of EMI in the design and implementation of instrumentation systems in legacy environments are presented. Common sources of EMI potentially introduced by the instrumentation systems themselves are examined, and means of design to mitigate such self-induce interference are examined. Real-life examples are provided to demonstrate the EMI issues, and the affect of mitigation. It’s all about the current – pretty much!
 
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TUPD06 CUPID: New System for Scintillating Screen Based Diagnostics radiation, controls, GUI, operation 417
 
  • B. Walasek-Höhne, C. Andre, A. Bräuning-Demian, H. Bräuning, R. Haseitl, T. Hoffmann, R. Lonsing, A. Reiter, C. Schmidt, M. Schwickert
    GSI, Darmstadt, Germany
 
  The Facility for Antiproton and Ion Research (FAIR) poses new challenges for standard beam instrumentation like precise beam imaging over a wide range of beam parameters, radiation hardness, etc. A new, fully FAIR-conformal system for standard scintillating screen based beam diagnostics was developed at GSI. To cover a wide range of foreseen applications, a new technical solution was required for the upcoming FAIR High Energy Beam Transport lines and Rings. The newly developed system including digital image acquisition, remote controllable optical system and mechanical design, was set up and commissioned with beam. CUPID (Control Unit for Profile and Image Data) is based on the CERN Front-End Software Architecture (FESA) to control beam diagnostic devices. The FESA class for the digital GigE camera (IDS uEye UI-5240SE-M, CMOS type) acquires the images and pre-processes the optical data as required by the geometry of the setup (rotation, stretching). The performance of the system reaches more than 15 frames per second with one connected client. If desired, the raw image data can be written to a file for offline analysis. Additionally, dedicated FESA classes access industrial Programmable Logic Controllers (PLCs) for a reliable slow control solution using the CERN IEPLC library. Camera control, timing, as well as power supply and reset options for up to eight digital cameras are realized by the in-house developed Camera Power Supply controller CPS8. We report on first results with the novel system during routine beam operation. In addition, we describe first operating experiences with new radiation-hard camera (Thermo Fischer Scientific, CCIR MegaRAD3) installed at the SIS18 extraction point with high radiation level.  
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WEPF06 A New Integrating Current Transformer for the LHC proton, resonance, operation, luminosity 540
 
  • L. Søby, D. Belohrad, M. Krupa, P. Odier
    CERN, Geneva, Switzerland
  • J.F. Bergoz, F. Stulle
    BERGOZ Instrumentation, Saint Genis Pouilly, France
 
  The existing fast beam current transformers of the LHC have been shown to exhibit both bunch length and bunch position dependency. A new Integrating Current Transformer (ICT) have therefore been developed in collaboration with Bergoz Instrumentation to address these issues. As goals a 0.1 %/mm beam position dependency and 0.1 % bunch length dependency were specified, along with a bandwidth of 100 MHz. This paper describes the principles of ICT operation and presents the laboratory measurement results obtained with the first prototypes at CERN.  
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WEPF18 Precise Digital Integration of Fast Analogue Signals Using a 12-Bit Oscilloscope 584
 
  • M. Krupa, M. Gąsior
    CERN, Geneva, Switzerland
 
  An accurate laboratory characterization of beam intensity monitors requires a reliable integration of analogue signals simulating beam pulses. This poses particular difficulties when a high integration resolution is necessary for short pulses. However, the recent availability of fast 12-bit oscilloscopes now makes it possible to perform precise digital integration of nanosecond pulses using such instruments. This paper describes the methods and results of laboratory charge measurements performed at CERN using a 12-bit oscilloscope with 1 GHz analogue bandwidth and 2.5 GS/s sampling.  
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WEPF31 Sensor Studies for DC Current Transformer Application ion, synchrotron, storage-ring, feedback 624
 
  • E. Soliman, K. Hofmann
    TU Darmstadt, Darmstadt, Germany
  • H. Reeg, M. Schwickert
    GSI, Darmstadt, Germany
 
  DC Current Transformers (DCCTs) are known since decades as non-intercepting standard tools for online beam current measurement in synchrotrons and storage rings. In general, the measurement principle of commonly used DCCTs is to introduce a modulating AC signal for a pair of ferromagnetic toroid. A passing DC ion beam leads to an asymmetric shift of the hysteresis curves of the toroid pair. However, a drawback for this measurement principle is found at certain revolution frequencies in ring accelerators, when interference caused by the modulating frequency and its harmonics leads to inaccurate readings by the DCCT. Recent developments of magnetic field sensors allow for new approaches towards a DCCT design without using the modulation principle. This paper shows a review of different kinds of usable magnetic sensors, their characteristics and how they could be used in novel DCCT instruments.  
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WEPD07 Evaluation of Libera Single Pass H for ESS LINAC linac, detector, controls, operation 647
 
  • M. Cargnelutti, M. Žnidarčič
    I-Tech, Solkan, Slovenia
  • H. Hassanzadegan
    ESS, Lund, Sweden
 
  The Beam Position Monitor system of the ESS linac will include in total more than 140 BPM detectors of different sizes and types. The resolution and accuracy of the position measurement with the nominal 62.5 mA beam current and 2.86 ms pulse width need to be 20 ?m and 100 ?m respectively, and those of the phase measurement are 0.2 deg and 1 deg respectively. The BPM system also needs to work successfully under off-optimal conditions, ex. with a de-bunched beam, or with the current and pulse width being as low as 6 mA and 10 ?s respectively. Options for the implementation of the ESS BPM electronics include: 1) a custom or commercial front-end card combined with a commercial digitizer with in-house developed firmware and 2) a fully commercial off the shelf system. Libera Single Pass H is an instrument intended for phase, position and charge monitoring in hadron and heavy ion LINACs. The instrument was tested at the ESS laboratory, to probe the feasibility of operation with ESS beam conditions. To give a realistic picture of the device performance, different testing setups were evaluated, including all the signal and environment conditions foreseen for the final ESS linac operation. The results present resolution, precision and accuracy evaluations, as well as stressful long-term and stability tests. This paper presents the achieved results of the Libera Single Pass H for the ESS beam parameters.  
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