Proton beam acceleration for PIXE analysis(Nov. 4 2020)
Nov 5, 2020 • pelletron
12:20
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RF source on
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Set PRB VC to 3.5 kV
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Set EXT VC to 4 kV
12:56
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Accelerator on at 1.3 MV
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beam current at FC01-1 ~ 100 nA
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beam current at FC02-1 ~52 nA (see attachment 1) and quite stable
13:10
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Adjust beam spot ~0.6x0.4 cm2
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Beam current at FCB1-1: ~9.7 nA ( see attachment 2)
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Start PIXE run 3143
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Start PIXE run 3142
13:53
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Start PIXE run 3144
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Beam current at FCB1-1 decrease to ~8.9 nA (see attachment 3)
15:49
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Run 3145 ended
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Beam current continue to decrease to ~7.2 nA
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Try to increase MV S2-1 a bit (from 1.7 to 1,9E-6 T) beam current increased to 8,4 nA and stable.
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Run 3146 started
17:09
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Run 3151 stop
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It’s been 4 hours since accelerator started. It has been operated non-stop at Terminal voltage of 1.3 MV. No problem.
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Attachment 4: beam and accelerator condition
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Chiller temperature at 19.8 degree C. Room temperature 20 degree, humidity 60 %. All 4 air conditioners are On and set at 21 degree C.
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Keep running accelerator until ion source shut down.
17:27
- Accelerator off
Attachment 1
Attachment 2
Attachment 3
Attachment 4
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