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Published byDamian Claessens Modified over 6 years ago
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Injector Studies Using Superlattice Photocathode
R. Suleiman, 13 Jan 2005 1. Running Conditions 2. PZT Scan 3. IA Scan RHWP Scan PITA Scan
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Running Conditions 10 Jan 2005
Superlattice photocathode in gun3 Hall C at 4-pass, E=4625 MeV. HWP IN. Beam current 60 uA. Transmission ~ 0.93
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PZT x-Scan
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PZT y-Scan
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QE plot done that morning Beam was at 700,730 Spot diameter 5mm
PZT x SLOPES: x-diff slopes (um/V) y-diff slopes (um/V) 1I 1I 0I02A 0L 0L 0L 0R C20A H H00A H00B BCM 0L02: ppm/V BCM 1 (Hall C): 3620 ppm/V PZT y SLOPES: x-diff slopes (um/V) y-diff slopes (um/V) 1I 1I 0I02A 0L 0L 0L 0R C20A H H00A H00B BCM 0L02: -961 ppm/V BCM 1 (Hall C): 948 ppm/V QE plot done that morning Beam was at 700,730 Spot diameter 5mm PZT x moves laser on cathode by 7um/V PZT x Scan showed a 41% /mm change in QE
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IA Scan BCM 0L02: -127 ppm/V BCM 1 (Hall C): 124 ppm/V
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RHWP Scan
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PITA Scan BCM 0L02: 187 ppm/V BCM 1 (Hall C): -140 ppm/V
This is setting voltage. 1 setting Volt corresponds to 60 V on the Pockel Cell on top of 2.7 kV
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