GTS meeting 5 02 17

• Beta Calculations: media:Sajini_April2017_Beta_calculations.pdf

• Attempts to run at 1 mA:

1. Ran for few seconds before a HV arc. QE dropped by a factor of 2.
2. Ran again for 1.5 hours (with ion-precipitators on) before a HV arc. QE dropped by another factor of 2.
3. ion collectors and anode current
4. The downstream ion collector was wired incorrectly
5. Grames paper on anode bias: Media:Grames_PST07_final.pdf
6. Pozdeyev PAC 2007 ion trapping: Media:Pozdeyev.PDF
7. Cornell PRAB paper on ion clearing electrodes: Media:Cornell ion colelctors PhysRevAccelBeams.19.034201.pdf
8. Gabriel's calculation (POISSON model) of the voltage needed in upstream ion collector (VICGT04, wire sticking out of the spool piece): Media:Ion collector VICGT04 wire stikcing out of spool piece.pdf
9. CEBAF vacuum during 1 mA run
10. 
11. GTS vacuum 1 mA run April 28 2017
12. 
13. GTS 1 mA run also tripped 1.5 hour July 11 2016
14. 

• Down Monday - Wednesday to:

1. Degas dump with NEGS at 25% on for ion pumps to take vacuum load
2. Replace ND filter from ND1 to ND3
3. Re-activate photocathode with 3 mm active area
4. Instrument wire scanner
5. Install WiFi access station and enable JMenu on PC in GTS cave
6. Why is Dump/FC reading -20 nA?
7. Hi-pot VIPGT06
8. SCAM VL LINE SYNC frequency is not 60 Hz?
9. Put ND filter in front of ITVGT06 and mount camera on the floor.