Gun assemblies, electrostatic models and field maps

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T-shape Electrode Assemblies on R28 insulators in 14" diameter vacuum chamber

CIS-ASY-R28-1
CIS-ASY-R28-2
CIS-ASY-R28-3
CIS-ASY-R28-4

Ball Electrode Assemblies on R30 insulators in 18" diameter vacuum chamber

CIS-ASY-R30-1
CIS-ASY-R30-2
CIS-ASY-R30-3

ELECTRODES

  • T-shape electrode with pure alumina (white) R28 insulator and 6.3 cm anode-cathode gap. Tested and beam run at 200keV in test cave, later operated in CEBAF injector for many years
  • T-shape electrode in white R28 insulator.PNG.PNG
  • Modified T-shape electrode with triple junction shield (Mushroom) on doped (black) R28 insulator and keeping 6.3 cm anode-cathode gap
  • Modified T-shape electrode with 'mushroom' triple junction shield and doped black R28 insulator.PNG.PNG
  • Spherical electrode on R30 insulator with 6.3 cm anode-cathode gap
  • Spherical electrode with R30 insulator and 6 cm anode gap.PNG