Carbon Polarimeter Study

1
Carbon Polarimeter Study

• The purpose of the study was to use the carbon
  targets and polarimeter detector system to
  measure the beam profile and emittance to compare
  and validate the IPM and cross section based
  emittance values.

2
Beam Characteristics

• Deuteron beam only
• Beam at Injection Energy
• Single Bunch
• Target Scan mode, 1 second measurement at 10-20
  positions separated by 500 microns.
• Detector bias voltage 90 volts

3
No reliable IPM result to compare with

• Vertical Target 5 sixth try

4
Beam Emittance
Emittance (p mm-mr)
Time of scan measurement
5
Beam Profile
Beam width (sigma, in mm)
Time of scan measurement
6
Work to do

• Things look good now, but we need more APEX time
  to set the timing of the DAQ correctly.
• Measure from 1 to 20 to 95 bunches.
• Measure emittance at store.
• Combine emittance measurements with IPM on the
  same beam.

7
Backup
8

• Horizontal Target 4

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• Horizontal Target 2

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• Horizontal Target 3 second try

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• Horizontal Target 3 first try

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• Horizontal Target 1

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• Vertical Target 6 second try

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• Vertical Target 6 first try

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• Vertical Target 4 second try

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• Vertical Target 4 first try

17

• Vertical Target 2
• Problems!

18

• Vertical Target 1
• Edge still evident

19

• Vertical Target 1 first try

20

• Vertical Target 1 second try

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• Vertical Target 1 third try

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• Vertical Target 1 fourth try

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• Vertical Target 1 fifth try

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• Vertical Target 5 first try

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• Vertical Target 5 second try

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• Vertical Target 5 third try

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• Vertical Target 5 fourth try

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• Vertical Target 5 fifth try