Author: Schneider, G.
Paper Title Page
WE2AB5 First Results From the Operation of a Rest Gas Ionisation Profile Monitor Based on a Hybrid Pixel Detector 318
 
  • J.W. Storey, D. Bodart, B. Dehning, G. Schneider, R. Veness
    CERN, Geneva, Switzerland
  • W. Bertsche, H. Sandberg
    UMAN, Manchester, United Kingdom
  • S.M. Gibson, S. Levasseur
    Royal Holloway, University of London, Surrey, United Kingdom
  • M. Sapinski
    GSI, Darmstadt, Germany
  • K. Satou
    J-PARC, KEK & JAEA, Ibaraki-ken, Japan
 
  A novel rest gas ionisation profile monitor which aims to provide a continuous non-destructive bunch-by-bunch measurement of the transverse emittance is currently under development for the CERN Proton Synchrotron (CPS). Uniquely for this type of instrument the imaging detector that measures the position of the ionisation electrons consists of an array of pixelated silicon sensors which are read-out using Timepix3 readout chips. The pixel detector is directly sensitive to single ionisation electrons and therefore removes the need for electron amplification with Multi-Channel Plates which typically suffer from aging phenomena. The use of a pixel detector also offers the promise to significantly improve the time and spatial resolution of the position measurement compared to existing instruments. An ambitious program has been undertaken to develop a pixel detector that is compatible with operation directly inside the beam pipe vacuum together with the necessary radiation hard control and data acquisition electronics. A prototype version of the instrument was recently installed in the CPS and first results from the operation of this novel instrument will be presented.  
slides icon Slides WE2AB5 [38.592 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WE2AB5  
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WEPCC08 Development of a Fluorescence Based Gas Sheet Profile Monitor for Use With Electron Lenses: Optical System Design and Preparatory Experiments 359
 
  • S. Udrea, P. Forck
    GSI, Darmstadt, Germany
  • E. Barrios Diaz, N. Chritin, O.R. Jones, P. Magagnin, G. Schneider, R. Veness
    CERN, Geneva, Switzerland
  • V. Tzoganis, C.P. Welsch, H.D. Zhang
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
 
  A hollow electron lens is presently under study as a possible addition to the collimation system for the high luminosity upgrade of the LHC (HL-LHC), while an electron lens system is also proposed for space charge compensation in the SIS-18 synchrotron for the high intensities at the future FAIR facility. For effective operation, a precise alignment is necessary between the high energy hadron beam and the low energy electron beam. In order to achieve this, a beam diagnostics setup based on an intersecting gas sheet and the observation of beam-induced fluorescence is under development. In this contribution we give an account of the design and performance of the optical detection system and report on recent preparatory experiments performed using a laboratory gas curtain Setup.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WEPCC08  
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