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Electron Beam Deflection by Permanent Magnet

Document #:
Document type:
Technical Note
Submitted by:
Elton Smith
Updated by:
Elton Smith
Document Created:
24 Feb 2006, 16:27
Contents Revised:
24 Feb 2006, 16:27
Metadata Revised:
17 Mar 2009, 12:23
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The proposed scheme for beam containment in the Hall D line \cite{ref:keller} places a permanent magnet in the photon beam following the tagger magnet as a fail-safe mechanism to ensure that the primary electron beam does not accidentally get dumped into the experimental area. Here we give a more quantitative estimate of the space needed in the tagger building to implement this beam containment proposal. We conclude that the tagger building must extend 13 m from the front of one permanent magnet to deflect the primary beam by 20 cm into a concrete absorber. This distance is sufficient to separate the electron from the photon beam pipe so that it can be contained downstream of the tagger building.
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  • pdf (permanent_magnet.pdf, 134.8 kB)
  • ps (, 101.3 kB)
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