Beams Document 7631-v1

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Foil Scattering Model for Fermilab Booster

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Submitted by:
Chandrashekhara M. Bhat
Updated by:
Chandrashekhara M. Bhat
Document Created:
12 Sep 2019, 14:10
Contents Revised:
12 Sep 2019, 14:10
Metadata Revised:
12 Sep 2019, 14:10
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At the Fermilab Booster, and many other proton facilities, an intense proton beam is accumulated by multi-turn injection of an H- beam through a stripping foil. The circulating beam scatters off the injection foil and large-angle Coulomb scattering leads to uncontrolled losses concentrated in the first betatron period. We measure the foil scattering loss rate in the Fermilab Booster as a function of LINAC current, number of injection turns, and time on the injection foil. We find that current Booster operation has ~1% foil scattering loss and we make projections for the Proton Improvement Plan II (PIP-II) injector upgrade. Here we present the results from our recent beam measurements and a foil scattering model analyses.
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