Phys. Rev. ST Accel. Beams 10, 053501 (2007) [6 pages]Proof-of-principle demonstration of high efficiency laser-assisted H- beam conversion to protons
Thin carbon foils are used as strippers for charge exchange injection into high intensity proton rings. However, the stripping foils become radioactive and produce uncontrolled beam loss, which is one of the main factors limiting beam power in high intensity proton rings. Recently, we presented a scheme for laser stripping an H- beam for the Spallation Neutron Source (SNS) ring. First, H- atoms are converted to H0 by a magnetic field, then H0 atoms are excited from the ground state to the upper levels by a laser, and the excited states are converted to protons by a magnetic field. In this paper we report on the proof-of-principle demonstration of this scheme to give high efficiency (around 90%) conversion of H- beam into protons at SNS in Oak Ridge. The experimental setup is described, and comparison of the experimental data with simulations is presented. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevSTAB.10.053501
DOI:
10.1103/PhysRevSTAB.10.053501
PACS:
52.38.Dx, 32.80.Fb
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