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 ion collector was wired incorrectly resulting in net zero E-field, assuming beam was centered perfectly:

• 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 frequency is not 60 Hz?