Difference between revisions of "GTS meeting 12 06 16"
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* High voltage processing with improved gun started on November 17th | * High voltage processing with improved gun started on November 17th | ||
| + | *[[File:High voltage processing DPP vs Barrel Polished.png]] | ||
** Improvements include: | ** Improvements include: | ||
# Black (doped alumina) R30 insulator | # Black (doped alumina) R30 insulator | ||
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# We are conditioning with SS DPP dummy wafer | # We are conditioning with SS DPP dummy wafer | ||
# Horizontal viewports are now AR coated (both surfaces), measured at <1% reflection at 532 nm | # Horizontal viewports are now AR coated (both surfaces), measured at <1% reflection at 532 nm | ||
| − | + | ||
Revision as of 11:13, 6 December 2016
- High voltage processing with improved gun started on November 17th
- Improvements include:
- Black (doped alumina) R30 insulator
- All SS electrodes, barrel polished
- Shed: Yan's design for <10 MV/m max field
- NEG modules (6 WP modules on bottom of chamber). Pre-activated in gun chamber, rinsed thoroughly to minimize dust
- Perforated plate to cover NEGs for minimizing field that can potentially lift up dust
- We are conditioning with SS DPP dummy wafer
- Horizontal viewports are now AR coated (both surfaces), measured at <1% reflection at 532 nm
- This is a link to the GTSLOG latest entry at 336kV in vacuum
- Mamun and Yan have made great progress with the photocathode preparation chamber'
- The chamber has many improvements including:
- Spring Puck retainer on top heater for adjusting the puck-efussion source gap freely,
- Ceramic insulator for biasing the puck
- Adjustable height mask
- Second Cs effusion source
- Additional Thermo Couple to calibrate both heaters
- Beam line
- The list have been assembled
- The components are being laid out on the beam line to establish length of needed spool pieces.
- The plan is to assemble the beam line up to the second valve, this allows running beam with two slits, two viewers, three solenoids and the insertable Faraday Cup
, 
- Cathode solenoid magnet power supply is ready - Today, DC group handed over to us. Will submit OSP by the end of this week.
- Kevin Jordan is studying the damaged YAG beam line viewer crystals
