GlueX Level-3 Trigger Meeting, Apr 13, 2017
From GlueXWiki
Contents
Meeting Info.
Meeting Time And Location
15:00 EST (JLab time)
CC A110
Connecting
You can connect using BlueJeans Video conferencing (ID: 198 332 417). (Click "Expand" to the right for details -->):
- Make sure you have created a BlueJeans account via your JLab CUE account using this link:
- http://jlab.bluejeans.com (You should only need to do this once)
- Meeting ID: 198 332 417
- (you may need to type this in, depending how you connect)
- If connecting via Web Browser: click this link (no passcode is needed):
- If connecting via iOS or Android App:
- Use your JLab e-mail address to log in and then enter the meeting ID given above to join the meeting
- If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
- Dial: 1 888 240 2560 (US or Canada only)
- or, List of International Numbers
- If connecting via Polycom unit:
- Dial 199.48.152.152 or bjn.vc
- Enter meeting ID above
Background Information
(Click expand for some links to background information -->)
Informational Links:
Justin's collaboration meeting talks:
Agenda
- Announcements
- Previous Meeting aka mini-review (Jul 22, 2016)
- Previously presented results
- Current Status
- Data Rates (David L.)
- May 18 review
- AOT
Minutes
Attendees: Simon T., Elton S., Alex S., Dave A., Sergey F., David L.
- Summary of final report from last July's L3 "mini-review" presented
- Current status of DAQ parameters (as understood by David) was presented
- DAQ event rate is currently limited by (according to Alex S.):
- CAEN TDCs
- TPOL
- CDC
- 95kHz readout rate tested and should be used as one limiting parameter
- L1 trigger goal according to Alex is 70kHz-80kHz
- Currently unknown when accidentals become enough of an issue that increasing beam current does not gain us anything
- This includes L1 rate reduction due to including ST in trigger. This sparked some discussion.
- Current data rate estimates are up at or just over 2GB/s without ST. Closer to 1.5GB/s with ST
- DAQ event rate is currently limited by (according to Alex S.):
- Two high intensity data sets were taken in Fall 2016. None were taken in Spring 2017./
- Conversion from beam current to photon beam intensity on target not fully understood in David'd analysis
- Alex described how he used PS rates and gets consistent results between Fall 2016 and Spring 2017 data
- Transmission improved by roughly 20% since the Fall
- Alex described how he used PS rates and gets consistent results between Fall 2016 and Spring 2017 data
- We will meet again next week and weekly until the review
- Action Items:
- Clarify beam intensity for Fall 2016 high intensity data sets and correlate to Spring 2017 conditions using PS (David)
- Estimate data volume and compare to what was previously provided to CC and use to estimate additional tape and hardware cost (David)
- Reinstall reprogrammed TD board in Hall (Alex)
- Continue testing of dual stream writing at high rate (Dave A., Sergey F.)
- Action Items: