Difference between revisions of "Robust Meeting - August 7, 2020"

From Ciswikidb
Jump to navigation Jump to search
 
(3 intermediate revisions by 2 users not shown)
Line 5: Line 5:
 
;Action Items
 
;Action Items
  
−
* Joe - coordinate a kick-off meeting with Cornell group
+
;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
+
 
−
* 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
−
* Joe - evaluate keV-Mott Mott for operating in 100-300 kV range and for high current lifetime studies
+
* 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
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?
Retrieved from "https://wiki.jlab.org/ciswiki/index.php?title=Robust_Meeting_-_August_7,_2020&oldid=20845"