ESS Docs Document 199-v1

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H- AND PROTON BEAM LOSS COMPARISON AT SNS SUPERCONDUCTING LINAC

Document #:
ESS-doc-199-v1
Document type:
Conference Proceedings
Submitted by:
Emanuele Laface
Updated by:
Emanuele Laface
Document Created:
17 May 2012, 23:46
Contents Revised:
17 May 2012, 23:46
DB Info Revised:
17 May 2012, 23:46
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Abstract:
A comparison of beam loss in the superconducting part (SCL) of the Spallation Neutron Source (SNS) linac for H- and protons is presented. During the experiment the nominal beam of negative hydrogen ions in the SCL was replaced by a proton beam created by insertion of a thin stripping carbon foil placed in the low energy section of the linac. The observed significant reduction in the beam loss for protons is explained by a domination of the intra beam stripping mechanism of the beam loss for H-. The details of the experiment are discussed, and a preliminary estimation of the cross section of the reaction H- + H- -> H- + H0 + e is presented. Earlier, a short description of these studies was presented in [1].
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