GTS meeting 7 23 18

• Measurements Conditions:

Gun = 200 kV
laser rms = 0.436 mm
gun solenoid off
Anode bias = +1000 V
Upstream Ion Collector bias = -44 V
Downstream Ion Collector bias = -92 V (one electrode, second electrode is grounded)

• Summary of lifetime measurements:
  • 10-min Sb Moly substrate photocathode lifetime: [1]
  • 90-min Sb GaAs substrate photocathode lifetime: [2]
  • 60-min Sb GaAs substrate photocathode lifetime: [3]
  • 30-min Sb GaAs substrate photocathode lifetime: [4]

• Laser heating measurements:
  • 60-min Sb GaAs substrate photocathode heating
  • 30-min Sb GaAs substrate photocathode heating