GTS meeting 7 23 18

• Summary of lifetime measurements:

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

• • 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]