Difference between revisions of "Meeting-6-29-2017"
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== CDC == | == CDC == | ||
| − | - We discussed briefly the effect of the space charge on the dE/dx in the CDC (as reported on the analysis meeting). This is a project that requires fitting of the dE/dx angular dependence for different particles (electrons, pions, kaons, protons) and correcting for it, which will significantly improve the PID. Sergey: the effect will depend also on the CDC HV. Curtis proposed to contact Klaus Peters and Nacer | + | - We discussed briefly the effect of the space charge on the dE/dx in the CDC (as reported on the analysis meeting). This is a project that requires fitting of the dE/dx angular dependence for different particles (electrons, pions, kaons, protons) and correcting for it, which will significantly improve the PID. Sergey: the effect will depend also on the CDC HV. Curtis proposed to contact Klaus Peters and Nacer (GSI) since they were interested in the dE/dx studies. |
| + | - Chris: the CDC cables were disconnected and re-routed (by Nick) to have more slack and better access to the electronics. | ||
- Fernando and Lubomir studied the noise in the Hall related to high trigger rates. The noise is seen on the FDC TDCs coming from the input to the discriminators. Scope screen - yellow is the trigger at the SD, pink is the discriminator output. On the spectral analyzer the noise had equidistant peaks - ~3.3 MHz apart for 60 kHz trigger rate and ~10 MHz apart for 15 kHz trigger rate - with an amplitude ~10dB in a wide range of 100MHz. The noise is seen everywhere on the crates and also along the signal cables. Fernando: the noise is low, but maybe combined from all the crates might indues measurable signals on the wires (Lubomir), as is the case. Discussions with Sergey after the meeting - the data rates (due to the noise) on some TDC crates are very high limiting the DAQ performance for the high intensity running. | - Fernando and Lubomir studied the noise in the Hall related to high trigger rates. The noise is seen on the FDC TDCs coming from the input to the discriminators. Scope screen - yellow is the trigger at the SD, pink is the discriminator output. On the spectral analyzer the noise had equidistant peaks - ~3.3 MHz apart for 60 kHz trigger rate and ~10 MHz apart for 15 kHz trigger rate - with an amplitude ~10dB in a wide range of 100MHz. The noise is seen everywhere on the crates and also along the signal cables. Fernando: the noise is low, but maybe combined from all the crates might indues measurable signals on the wires (Lubomir), as is the case. Discussions with Sergey after the meeting - the data rates (due to the noise) on some TDC crates are very high limiting the DAQ performance for the high intensity running. | ||
Revision as of 16:33, 29 June 2017
June 29, 2017 Drift Chamber meeting
Connection
- Instructions for Bluejeans meeting connection
- Meeting ID: 290664653
Headline text
- To join via a Web Browser, go to the page [1] https://bluejeans.com/290664653.
Agenda
- CDC
- dEdx (Lubomir)
- FDC
- inefficiency pattern (Alex)
- Tracking
- Alignment progress? (Mike)
- 2017 mcsmear Workplan
- fADC125? (Naomi, Cody, Beni)
- Other
- TRD (Lubomir)
