Difference between revisions of "February 11, 2015 - CIS Group Meeting"
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− | ==Startup | + | ==CEBAF Startup== |
+ | '''Laser Program''' | ||
+ | :A = 50uA @ 125 MHz or 100uA @ 250 MHz | ||
+ | :B = 499 | ||
+ | :C = 250 | ||
− | Laser | + | '''Laser setup''' |
− | : | + | :No spare amps, 4-6 weeks from IPG for two replacement amps |
− | : | + | :Replace 2m (FWHM~1mm) spot lens with 1.5m (FWHM~0.4mm) lens |
− | |||
− | + | '''Phase flip''' | |
− | :: | + | :Make divider box less sensitive to EMI? |
+ | :Phase monitoring to keep phases between 3 lasers | ||
+ | :Analog gain switching at 250 MHz | ||
− | + | '''Change the laser phase''' | |
− | : | + | :When we change the frequency use 0I04 viewer to check/set phase |
− | :: | + | :Command line EPICS control sufficient now, Mike Johnson still working it |
− | : | + | :Tomas can provide a ~2ns delay cable |
+ | :John can DAC control a phase delay ~2ns | ||
− | To Do | + | '''To Do''' |
− | We will learn at separators if we | + | :We will learn at separators if we can flip A/D or D/A order |
− | We will decide by summer time a final system configuration | + | :We will decide by summer time a final system configuration |
− | + | ==GTS== | |
+ | '''SF6 tanks''' | ||
+ | :Bubba repaired SF6 leak, pumping now and check | ||
+ | :Test various insulators | ||
+ | :: black = bulk resistivity = shorty R28 (ordered R30, but too little resistivity so too much current draw) | ||
+ | :: white = coated with black = suffer similar resistively too low, but at least constant | ||
+ | :: white + spiral = coated with black but sand-blasted spiral (16 feet path length, so longer length of resistor) | ||
+ | :: tracking on R350 ceramic in SF6 tank possibly due to low SF6 pressure | ||
+ | '''Electrode''' | ||
+ | : Nb = pressed, polished? | ||
+ | : Steel = welded, looks good, not polished | ||
+ | : Wave anode, but not the spider support | ||
+ | '''Va beamline''' | ||
+ | :Shop making end plates | ||
+ | :Ordering new shell + using previous 848 turn coil | ||
+ | :Yan figure out what fields are needed for the solenoids | ||
+ | |||
+ | ==UITF== | ||
+ | '''Layout''' | ||
+ | :Joe Gubeli generated mechanical model from preliminary Elegant layout, will study mechanical strength | ||
+ | :HDIce group working on monte carlo model of backgrounds by dump | ||
+ | :Meeting will be setup to advance layout of gun + prep chamber |
Latest revision as of 12:57, 11 February 2015
CEBAF Startup
Laser Program
- A = 50uA @ 125 MHz or 100uA @ 250 MHz
- B = 499
- C = 250
Laser setup
- No spare amps, 4-6 weeks from IPG for two replacement amps
- Replace 2m (FWHM~1mm) spot lens with 1.5m (FWHM~0.4mm) lens
Phase flip
- Make divider box less sensitive to EMI?
- Phase monitoring to keep phases between 3 lasers
- Analog gain switching at 250 MHz
Change the laser phase
- When we change the frequency use 0I04 viewer to check/set phase
- Command line EPICS control sufficient now, Mike Johnson still working it
- Tomas can provide a ~2ns delay cable
- John can DAC control a phase delay ~2ns
To Do
- We will learn at separators if we can flip A/D or D/A order
- We will decide by summer time a final system configuration
GTS
SF6 tanks
- Bubba repaired SF6 leak, pumping now and check
- Test various insulators
- black = bulk resistivity = shorty R28 (ordered R30, but too little resistivity so too much current draw)
- white = coated with black = suffer similar resistively too low, but at least constant
- white + spiral = coated with black but sand-blasted spiral (16 feet path length, so longer length of resistor)
- tracking on R350 ceramic in SF6 tank possibly due to low SF6 pressure
Electrode
- Nb = pressed, polished?
- Steel = welded, looks good, not polished
- Wave anode, but not the spider support
Va beamline
- Shop making end plates
- Ordering new shell + using previous 848 turn coil
- Yan figure out what fields are needed for the solenoids
UITF
Layout
- Joe Gubeli generated mechanical model from preliminary Elegant layout, will study mechanical strength
- HDIce group working on monte carlo model of backgrounds by dump
- Meeting will be setup to advance layout of gun + prep chamber