Beams Document 323-v2

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Beam Position Monitors for the Fermilab Recycler Ring

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Submitted by:
Ruth A. Becker
Updated by:
Bruce C. Brown
Document Created:
29 Apr 1998, 00:00
Contents Revised:
29 Apr 1998, 00:00
Metadata Revised:
29 Apr 1998, 00:00
Actually Revised:
10 Nov 2003, 14:56
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14 Jul 2003, 16:30
29 Apr 1998, 00:00
Fermilab's new Recycler Ring will recover and cool "used" antiprotons at the end of a Tevatron store and also accumulate "new" antiprotons from
the Antiproton Source. A wideband RF system based on barrier buckets will result in unbunched beam, grouped in one to three separate partitions
throughout the ring. A new Beam Position Monitor system will measure position of any one partition at a time, using low frequency signals from beam
distribution edges. A signal path including an elliptical split-plate detector, radiation-resistant tunnel preamplifiers, and logarithmic amplifiers will result in a
held output voltage nearly proportional to position. The results will be digitized using Industry Pack technology and a Motorola MVME162 processor board.
The data acquisition subsystem including digitization and timing for 80 position channels will occupy two VME slots. System design will be described, with
some additional emphasis on the use of logamp chips.
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