Difference between revisions of "PREX/CREX Oct 24, 2019 14:00"
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== Agenda == | == Agenda == | ||
# Ongoing CREX prep activities: all | # Ongoing CREX prep activities: all | ||
| − | #* | + | #* CG: what is the startup schedule? KP: latest Gant chart from B-team shows that beam tests to the halls on Nov 13th. |
| + | #* KP: the compton laser has dropped in power quite a lot. work will be needed in early November. | ||
| + | #* KP: target cooldown has been moved to before thanksgiving. | ||
| + | #* DM: working on the wiki to update the instructions for CREX (while saving the PREX instructions). CC: basically duplicated the information by adding PREXII in the page name. | ||
| + | #* CC: took test runs with the cavities by injecting signal. will repeat for digitals. log entries created (1% non linearity for analogs) | ||
| + | #* CG: will send Jack an email about power supply for septum | ||
# SAM cans: Ciprian | # SAM cans: Ciprian | ||
| − | #* | + | #* CG: details ironed out last Friday with Machine Shop at SBU. Manufacturing slated to start tomorrow or Monday. |
| + | #* CG: vacuum testing system waiting on a convertor flange. We will get it Oct 30th (just in time with the first cans) | ||
# Injector laser work: Caryn | # Injector laser work: Caryn | ||
| − | #* | + | #* CP: defining the settings for all 4 lasers. we did the cathode rotation. on the 29th we may be able to do pos diff feedback. we will run at 120Hz. |
| + | # Detector linearity: Devi | ||
| + | #* DeA: mentioned before the degradation of the current during PREX. made measurements of the anode currents with the same setup as before the run. DM: there was a degradation in the dinode or base (the cathode seems to be fine). we tried to minimize the changes in the setup. | ||
| + | #* DeA: the non linearities are all small before and after. KP: very impressive. | ||
| + | # PREX targets: Silviu | ||
| + | #* SD: the one with the cracked graphite is #5 on the ladder (208Pb2), the one with the raster pattern is 208Pb3. | ||
| + | #* SD: we also seemed to be pretty well centered. | ||
| + | #* CP: a picture of the front and back would be useful. | ||
| + | #* SD: 208Pb8 is the one with a piece of diamond off | ||
| + | #* SD: 208Pb6 is the one that looks good in the last picture and we ran 85uA on it. | ||
| + | #* SD: Dave M said it was not badly damaged and he cleaned the surface with radCon help. He plans to install it back. DM: wonder if there is a raster pattern on it. | ||
| + | #* KP: will throw some updated pictures on the docDB | ||
# Other | # Other | ||
| − | #* | + | #* |
== Present == | == Present == | ||
Revision as of 15:10, 24 October 2019
Back to Main Page >> PREX/CREX_Teleconferences
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Logistic information
BlueJeans calling instructions: Toll-Free Number (U.S.& Canada): 888-240-2560 International toll number: 408-740-7256 Bluejeans CODE: 373 507 581 Bluejeans link: https://bluejeans.com/373507581 Offline room: CEBAF Center F224-225
Agenda
- Ongoing CREX prep activities: all
- CG: what is the startup schedule? KP: latest Gant chart from B-team shows that beam tests to the halls on Nov 13th.
- KP: the compton laser has dropped in power quite a lot. work will be needed in early November.
- KP: target cooldown has been moved to before thanksgiving.
- DM: working on the wiki to update the instructions for CREX (while saving the PREX instructions). CC: basically duplicated the information by adding PREXII in the page name.
- CC: took test runs with the cavities by injecting signal. will repeat for digitals. log entries created (1% non linearity for analogs)
- CG: will send Jack an email about power supply for septum
- SAM cans: Ciprian
- CG: details ironed out last Friday with Machine Shop at SBU. Manufacturing slated to start tomorrow or Monday.
- CG: vacuum testing system waiting on a convertor flange. We will get it Oct 30th (just in time with the first cans)
- Injector laser work: Caryn
- CP: defining the settings for all 4 lasers. we did the cathode rotation. on the 29th we may be able to do pos diff feedback. we will run at 120Hz.
- Detector linearity: Devi
- DeA: mentioned before the degradation of the current during PREX. made measurements of the anode currents with the same setup as before the run. DM: there was a degradation in the dinode or base (the cathode seems to be fine). we tried to minimize the changes in the setup.
- DeA: the non linearities are all small before and after. KP: very impressive.
- PREX targets: Silviu
- SD: the one with the cracked graphite is #5 on the ladder (208Pb2), the one with the raster pattern is 208Pb3.
- SD: we also seemed to be pretty well centered.
- CP: a picture of the front and back would be useful.
- SD: 208Pb8 is the one with a piece of diamond off
- SD: 208Pb6 is the one that looks good in the last picture and we ran 85uA on it.
- SD: Dave M said it was not badly damaged and he cleaned the surface with radCon help. He plans to install it back. DM: wonder if there is a raster pattern on it.
- KP: will throw some updated pictures on the docDB
- Other
