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A High Power Hydrogen Target for Parity Violation Experiments

E. J. Beise·D. H. Beck·E. Candell·R. Carr·F. Duncan·T. Forest·W. Korsch·J. W. Mark·R. D. McKeown·B. A. Mueller·S. Wells
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Abstract

Parity-violating electron scattering measurements on hydrogen and deuterium, such as those underway at the Bates and CEBAF laboratories, require luminosities exceeding $10^{38}$cm$^{-2}$s$^{-1}$, resulting in large beam power deposition into cryogenic liquid. Such targets must be able to absorb 500 watts or more with minimal change in target density. A 40~cm long liquid hydrogen target, designed to absorb 500~watts of beam power without boiling, has been developed for the SAMPLE experiment at Bates. In recent tests with 40~$μ$A of incident beam, no evidence was seen for density fluctuations in the target, at a sensitivity level of better than 1\%. A summary of the target design and operational experience will be presented.

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E. J. Beise, D. H. Beck, E. Candell, R. Carr, F. Duncan, T. Forest, W. Korsch, J. W. Mark, R. D. McKeown, B. A. Mueller, S. Wells. 1996-02-14. A High Power Hydrogen Target for Parity Violation Experiments. https://doi.org/10.1016/0168-9002(96)00489-5

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