Difference between revisions of "February 11, 2015 - CIS Group Meeting"
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| Line 25: | Line 25: | ||
==GTS== | ==GTS== | ||
| − | ''' | + | '''SF6 tanks''' |
| − | + | :Bubba repaired SF6 leak, pumping now and check | |
| − | |||
:Test various insulators | :Test various insulators | ||
:: black = bulk resistivity = shorty R28 (ordered R30, but too little resistivity so too much current draw) | :: black = bulk resistivity = shorty R28 (ordered R30, but too little resistivity so too much current draw) | ||
| Line 33: | Line 32: | ||
:: white + spiral = coated with black but sand-blasted spiral (16 feet path length, so longer length of resistor) | :: 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 | :: 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== | ==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