Difference between revisions of "Photon Beam Design Requirements"

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(Global Specifications for the Hall D Photon Beam)
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== Global Specifications for the Hall D Photon Beam ==
 
== Global Specifications for the Hall D Photon Beam ==
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# choice of photon energy in the range 8 - 12 GeV [1]
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# orientable diamond crystal bremsstrahlung radiator [2]
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# peak linear polarization of 40% at 9 GeV with collimation [2,3]
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# average polarization 36% in coherent peak 8.4 - 9.0 GeV [2,3]
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# bremsstrahlung collimator with active stabilization [3]
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# photons tagged in coherent peak with energy resolution better than 60 MeV (0.5%) [1,4,5]
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# beam tagged at 1% resolution over extended range 3 - 11.4 GeV [4,6]
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# absolute photon energy calibration better than ± 30 MeV
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# nominal operation at 10 MHz tagged photons in coherent peak after collimator [1,3]
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# tagging rate 25 MHz within coherent peak at nominal intensity [5]
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# tagging possible up to 100 MHz tagged photons on target in coherent peak [1,3,5]
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# 500 MHz beam pulse repetition rate [1,5,6]

Revision as of 15:58, 29 January 2008

Global Specifications for the Hall D Photon Beam

  1. choice of photon energy in the range 8 - 12 GeV [1]
  2. orientable diamond crystal bremsstrahlung radiator [2]
  3. peak linear polarization of 40% at 9 GeV with collimation [2,3]
  4. average polarization 36% in coherent peak 8.4 - 9.0 GeV [2,3]
  5. bremsstrahlung collimator with active stabilization [3]
  6. photons tagged in coherent peak with energy resolution better than 60 MeV (0.5%) [1,4,5]
  7. beam tagged at 1% resolution over extended range 3 - 11.4 GeV [4,6]
  8. absolute photon energy calibration better than ± 30 MeV
  9. nominal operation at 10 MHz tagged photons in coherent peak after collimator [1,3]
  10. tagging rate 25 MHz within coherent peak at nominal intensity [5]
  11. tagging possible up to 100 MHz tagged photons on target in coherent peak [1,3,5]
  12. 500 MHz beam pulse repetition rate [1,5,6]