Difference between revisions of "GEM Meeting/20190405"
From PREX Wiki
Jump to navigationJump to searchChandabindu (talk | contribs) (→Agenda) |
Chandabindu (talk | contribs) |
||
| (2 intermediate revisions by the same user not shown) | |||
| Line 10: | Line 10: | ||
==Agenda== | ==Agenda== | ||
* Siyu: PRex UVa GEM update[[Media:20190405_PRex_weekly_meeting.pdf|slides]] | * Siyu: PRex UVa GEM update[[Media:20190405_PRex_weekly_meeting.pdf|slides]] | ||
| − | * Chandan: Test Lab update [Media:TestLabUpdate_5April19.pdf|slides]] | + | * Chandan: Test Lab update [[Media:TestLabUpdate_5April19.pdf|slides]] |
==Minutes== | ==Minutes== | ||
| − | + | * Chandan: The Fastbus ADC (LeCroy 1881M) is good for Q2 measurement - based on specification on datasheet | |
| + | * Chandan: One of the PREX GEM detector has a board problem. It instroduces small (~5 pF) in series with the foil capacitance. Avoided by connecting two segments of the same foil and finally connected to the voltage divider using the existing good connection. The same detector has some wired pesdestal problem. It looks intrinsic to the detector. | ||
| + | * Chandan: There are problem with the ISU daq3 computer. It cannot handle data rate more than 20 MB/s. Using different coda server, the present DAQ (18 APVs) can reach upto 1.3 kHz trigger rate without any dead time. Based on the tr busy signal, MPD data readout time and network cable transer rate, the maximum trigger rate for 84 APVs is estimated and that value is ~ 800 Hz (assuming using two crates with42 APV cards in each crate). | ||
| + | ** Seamus: Nilanga said in some HallA experiment they achieved 500 Hz trigger rate using 110 APV cards. We have to confirm how many crates they gave used and how many smaples/ strip they read during the experiment. | ||
| + | * Seamus: Retrieve old PREX counting mode codes and working on that. | ||
| + | * Siyu: Gave a update for SBS-GEM requirement. | ||
| + | * Seamus: Tao has figured out the SLAC data mismatch problem. | ||
| + | ** Dustin:There were problem with cleaning buffer for every run. That has been taken care during data aquisition using plastic trigger. Probably we could modify the read-out lsit to solve the problem. | ||
== Present == | == Present == | ||
| − | + | Dustin, Seamus, Ryan, Tao, Cameron, Siyu, Bryan, Chandan | |
===Excused=== | ===Excused=== | ||
Latest revision as of 18:21, 5 April 2019
Back to Main Page >> GEM_Meeting
Logistic information
BlueJeans calling instructions: Toll-Free Number (U.S.& Canada): 888-240-2560 International toll number: 408-740-7256 Bluejeans CODE: 998 903 0149 Bluejeans link: https://bluejeans.com/9989030149
Agenda
Minutes
- Chandan: The Fastbus ADC (LeCroy 1881M) is good for Q2 measurement - based on specification on datasheet
- Chandan: One of the PREX GEM detector has a board problem. It instroduces small (~5 pF) in series with the foil capacitance. Avoided by connecting two segments of the same foil and finally connected to the voltage divider using the existing good connection. The same detector has some wired pesdestal problem. It looks intrinsic to the detector.
- Chandan: There are problem with the ISU daq3 computer. It cannot handle data rate more than 20 MB/s. Using different coda server, the present DAQ (18 APVs) can reach upto 1.3 kHz trigger rate without any dead time. Based on the tr busy signal, MPD data readout time and network cable transer rate, the maximum trigger rate for 84 APVs is estimated and that value is ~ 800 Hz (assuming using two crates with42 APV cards in each crate).
- Seamus: Nilanga said in some HallA experiment they achieved 500 Hz trigger rate using 110 APV cards. We have to confirm how many crates they gave used and how many smaples/ strip they read during the experiment.
- Seamus: Retrieve old PREX counting mode codes and working on that.
- Siyu: Gave a update for SBS-GEM requirement.
- Seamus: Tao has figured out the SLAC data mismatch problem.
- Dustin:There were problem with cleaning buffer for every run. That has been taken care during data aquisition using plastic trigger. Probably we could modify the read-out lsit to solve the problem.
Present
Dustin, Seamus, Ryan, Tao, Cameron, Siyu, Bryan, Chandan
