Difference between revisions of "GTS meeting 7 23 18"

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Line 7: Line 7:
 
  Upstream Ion Collector bias = -44 V
 
  Upstream Ion Collector bias = -44 V
 
  Downstream Ion Collector bias = -92 V (one electrode, second electrode is grounded)
 
  Downstream Ion Collector bias = -92 V (one electrode, second electrode is grounded)
 +
  
 
* Summary of lifetime measurements:
 
* Summary of lifetime measurements:
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** 60-min Sb GaAs substrate photocathode lifetime: [https://logbooks/entry/3581644]
 
** 60-min Sb GaAs substrate photocathode lifetime: [https://logbooks/entry/3581644]
 
** 30-min Sb GaAs substrate photocathode lifetime: [https://logbooks/entry/3581642]
 
** 30-min Sb GaAs substrate photocathode lifetime: [https://logbooks/entry/3581642]
 +
 +
 +
* Laser heating measurements:
 +
** 60-min Sb GaAs substrate photocathode heating
 +
** 30-min Sb GaAs substrate photocathode heating

Revision as of 09:46, 23 July 2018

  • 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