Difference between revisions of "Robust Meeting - August 7, 2020"
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(Created page with ";Action Items * Joe - coordinate a kick-off meeting with Cornell group * Riad - start discussion with Bryan Moffit, develop work plan and purchasing list to build ad commissi...") |
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+ | ;Meeting Info | ||
+ | * Time : August 7, 2-3 pm | ||
+ | * Bluejeans : https://bluejeans.com/7572697097 | ||
+ | |||
;Action Items | ;Action Items | ||
− | + | ;Joe - coordinate a kick-off meeting with Cornell group | |
− | + | ||
− | * Marcy - list any UITF gun and beam line jobs or repairs to make photocathodes reliably, improve vacuum for high current lifetime studies | + | ;Riad - start discussion with Bryan Moffit, develop work plan and purchasing list to build ad commission polarimeter DAQ in the Oct 20 - Mar 21 |
− | * Carlos - evaluate energy reach of gun and Wien filter for experiments in the Apr 21 - Sep 21 time frame | + | * Jul-Aug 2008 keV CEBAF Mott (100/500) last time |
− | * Mamun - develop plans to modify the 1137 and UITF depo chambers to test and finally transfer Cornell recipes to UITF photo-gun | + | * (2) detectors installed @ 120 deg + other (2) Riad's office; many pairs of pre-amps stored in office |
− | + | * Riad suggests 200 keV (low risk for gun, less x-ray background, lower cross-section) ideally @ 130 deg | |
+ | * Riad is building a Mott DAQ at UITF | ||
+ | ** 19" rack (Scott is going to buy, goes on top of cave) | ||
+ | ** VME crate => buying new crate (Chris Cuevas will buy) + SBC (single board computer) brain of crate (ordered) | ||
+ | ** Trying to solicit Daniel to develop Mott DAQ/analysis at UITF | ||
+ | |||
+ | ;Marcy - list any UITF gun and beam line jobs or repairs to make photocathodes reliably, improve vacuum for high current lifetime studies | ||
+ | * garages in y chamber to avoid charging viewers | ||
+ | * determine status of Matt's mini-puck loader | ||
+ | * Likely need to add pumps to Mott chamber and use instead of dump line DP can | ||
+ | |||
+ | ;Carlos - evaluate energy reach of gun and Wien filter for experiments in the Apr 21 - Sep 21 time frame | ||
+ | * we'll plan for 200 keV, but no conflict if we were to operate at higher voltage (could be useful) | ||
+ | * Upgrade Wien filter OK, making it 200 keV for CEBAF, but 350 keV may not be possible just yet (with this Wien) | ||
+ | * Install Blue UITF Wien at some point...figure out when? | ||
+ | |||
+ | ; Mamun - develop plans to modify the 1137 and UITF depo chambers to test and finally transfer Cornell recipes to UITF photo-gun | ||
+ | |||
+ | ;Joe - evaluate keV-Mott Mott for operating in 100-300 kV range and for high current lifetime studies | ||
+ | * Xavi Aug 24...will start working on keV Mott (CS,S,TU) | ||
+ | |||
+ | ; Action Items | ||
+ | * Get IHWP/RWP wave plates at UITF | ||
+ | * Ask Scott to order 19" crate, small helicity board crate + isolation transformer + STAC5 controller for the Mott | ||
+ | * Do we add detectors at 60 deg (we have old detectors, pre-amps, plus enough spare channels of bias+amp) | ||
+ | * Do we need new/different collimators; lower Z???, lead around detectors, need more collimators/parts | ||
+ | * Improvements to the beam line when adding Mott (viewer charging) | ||
+ | * Develop draft/layout of the Mott line (how to put Mott in, steering magnets, focusing magnet?, valve, viewer/harp?) | ||
+ | * What does the bottom of chamber look like (pumping, accepts long target ladder?) | ||
+ | * What selection of targets do we want (higher Z => larger analyzer power/CS and vice versa) | ||
+ | * What target foil inventory list?!?! => do we have foils to use, or buy some from Lebow? | ||
+ | * What about the gun needs to be fixed to have a high lifetime program... | ||
+ | * HV chamber | ||
+ | ::Eliminate field emission for lifetime measurement and low current Mott measurements | ||
+ | ::Carlos recently processed UITF SS cathode + small shed to 250 kV to reduce FE'er but still exists, can it happen or do we need larger electrode? | ||
+ | ::HV chamber is mis-aligned, need preserve good laser launch/retroreflection | ||
+ | * Prep chamber: | ||
+ | ::Align LM to cathode electrode => no scraping, align the SM1/2/heater all to the heater stalk, mask | ||
+ | ::Matt has an load upgrade chamber...what's the plan? | ||
+ | :: |
Latest revision as of 15:43, 7 August 2020
- Meeting Info
- Time : August 7, 2-3 pm
- Bluejeans : https://bluejeans.com/7572697097
- Action Items
- Joe - coordinate a kick-off meeting with Cornell group
- Riad - start discussion with Bryan Moffit, develop work plan and purchasing list to build ad commission polarimeter DAQ in the Oct 20 - Mar 21
- Jul-Aug 2008 keV CEBAF Mott (100/500) last time
- (2) detectors installed @ 120 deg + other (2) Riad's office; many pairs of pre-amps stored in office
- Riad suggests 200 keV (low risk for gun, less x-ray background, lower cross-section) ideally @ 130 deg
- Riad is building a Mott DAQ at UITF
- 19" rack (Scott is going to buy, goes on top of cave)
- VME crate => buying new crate (Chris Cuevas will buy) + SBC (single board computer) brain of crate (ordered)
- Trying to solicit Daniel to develop Mott DAQ/analysis at UITF
- Marcy - list any UITF gun and beam line jobs or repairs to make photocathodes reliably, improve vacuum for high current lifetime studies
- garages in y chamber to avoid charging viewers
- determine status of Matt's mini-puck loader
- Likely need to add pumps to Mott chamber and use instead of dump line DP can
- Carlos - evaluate energy reach of gun and Wien filter for experiments in the Apr 21 - Sep 21 time frame
- we'll plan for 200 keV, but no conflict if we were to operate at higher voltage (could be useful)
- Upgrade Wien filter OK, making it 200 keV for CEBAF, but 350 keV may not be possible just yet (with this Wien)
- Install Blue UITF Wien at some point...figure out when?
- Mamun - develop plans to modify the 1137 and UITF depo chambers to test and finally transfer Cornell recipes to UITF photo-gun
- Joe - evaluate keV-Mott Mott for operating in 100-300 kV range and for high current lifetime studies
- Xavi Aug 24...will start working on keV Mott (CS,S,TU)
- Action Items
- Get IHWP/RWP wave plates at UITF
- Ask Scott to order 19" crate, small helicity board crate + isolation transformer + STAC5 controller for the Mott
- Do we add detectors at 60 deg (we have old detectors, pre-amps, plus enough spare channels of bias+amp)
- Do we need new/different collimators; lower Z???, lead around detectors, need more collimators/parts
- Improvements to the beam line when adding Mott (viewer charging)
- Develop draft/layout of the Mott line (how to put Mott in, steering magnets, focusing magnet?, valve, viewer/harp?)
- What does the bottom of chamber look like (pumping, accepts long target ladder?)
- What selection of targets do we want (higher Z => larger analyzer power/CS and vice versa)
- What target foil inventory list?!?! => do we have foils to use, or buy some from Lebow?
- What about the gun needs to be fixed to have a high lifetime program...
- HV chamber
- Eliminate field emission for lifetime measurement and low current Mott measurements
- Carlos recently processed UITF SS cathode + small shed to 250 kV to reduce FE'er but still exists, can it happen or do we need larger electrode?
- HV chamber is mis-aligned, need preserve good laser launch/retroreflection
- Prep chamber:
- Align LM to cathode electrode => no scraping, align the SM1/2/heater all to the heater stalk, mask
- Matt has an load upgrade chamber...what's the plan?