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Gilpatrick, J.D.

Paper Title Page
CT05 Beam-Profile Instrumentation for a Beam-Halo Measurement: Overall Description, Operation, and Beam Data
Work supported by the US Department of Energy 		76
 
  • J.D. Gilpatrick, D. Barr, L. Day, D. Kerstiens, M. Stettler, R. Valdiviez
    LANL, Los Alamos National Laboratory, Los Alamos, NM, USA
  • M. Gruchalla, J. O'Hara
    HC, Honeywell Corporation, USA
  • J. Kamperschroer
    GAC, General Atomics Corporation, San Diego, CA, USA
  
  The halo experiment presently being conducted at the Low Energy Demonstration Accelerator (LEDA) at Los Alamos National Laboratory (LANL) has specific instruments that acquire horizontally and vertically projected particle-density beam distributions out to greater than 105:1 dynamic range. We measure the core of the distributions using traditional wire scanners, and the tails of the distribution using water-cooled graphite scraping devices. The wire scanner and halo scrapers are mounted on the same moving frame whose location is controlled with stepper motors. A sequence within the Experimental Physics and Industrial Control System (EPICS) software communicates with a National Instrument LabVIEW virtual instrument to control the movement and location of the scanner/scraper assembly. Secondary electrons from the wire scanner 33 μm carbon wire and protons impinging on the scraper are both detected with a lossy-integrator electronic circuit. Algorithms implemented within EPICS and in Research Systems Interactive Data Language (IDL) subroutines analyse and plot the acquired distributions. This paper describes the beam profile instrument, describes our experience with its operation, compares acquired profile data with simulations, and discusses various beam profile phenomenon specific to the halo experiment.  
PS02 Bench Test of a Residual Gas Ionization Profile Monitor (Rgipm)
Work supported by U.S. Department of Energy 		102
 
  • W.C. Sellyey, J.D. Gilpatrick
    LANL, Los Alamos National Laboratory, Los Alamos, NM, USA
  • R. Senior
    GAC, General Atomics Corporation, San Diego, CA, USA
  
  An RGIPM has been designed, constructed and bench tested to verify that all components are functioning properly and that the desired resolution of about 50μm× rms can be achieved. This paper will describe some system details and it will compare observed results to detailed numerical calculations of expected detector response.