Proton beam acceleration for PIXE analysis(Nov. 4 2020)

Nov 5, 2020 • pelletron

12:20

  • RF source on

  • Set PRB VC to 3.5 kV

  • Set EXT VC to 4 kV

12:56

  • Accelerator on at 1.3 MV

  • beam current at FC01-1 ~ 100 nA

  • beam current at FC02-1 ~52 nA (see attachment 1) and quite stable

13:10

  • Adjust beam spot ~0.6x0.4 cm2

  • Beam current at FCB1-1: ~9.7 nA ( see attachment 2)

  • Start PIXE run 3143

  • Start PIXE run 3142

13:53

  • Start PIXE run 3144

  • Beam current at FCB1-1 decrease to ~8.9 nA (see attachment 3)

15:49

  • Run 3145 ended

  • Beam current continue to decrease to ~7.2 nA

  • 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.

  • Run 3146 started

17:09

  • Run 3151 stop

  • It’s been 4 hours since accelerator started. It has been operated non-stop at Terminal voltage of 1.3 MV. No problem.

  • Attachment 4: beam and accelerator condition

  • 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.

  • Keep running accelerator until ion source shut down.

17:27

  • Accelerator off

Attachment 1 04.11.20 attachment 1 Attachment 2 04.11.20 attachment 2 Attachment 3 04.11.20 attachment 3 Attachment 4 04.11.20 attachment 4