Difference between revisions of "Minutes-8-28-2014"

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FDC meeting ID: 290664653
 
FDC meeting ID: 290664653
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= Minutes =
 
= Minutes =
  
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Participants: Curtis, Naomi (CMU), Sean (NU), Beni, Mike, Luke, Eugene, Chris, Nick, Dave, Bill, Fernando, Sergey, Vlad and Lubomir (JLab).
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Participants: Curtis, Naomi (CMU), Sean (NU), Beni, Luke, Chris, Nick, Bill, Fernando, and Lubomir (JLab).
  
 
== DAQ ==
 
== DAQ ==
  
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- Beni: testing the latest fADC125 firmware released, works except something goes wrong in the FPGA when setting event number. ROCFDC3 has problems will be excluded for the next run. We want to take data with the magnet on. The top scintillator paddle was moved as high as possible to reduce the filed on the PMTs. Actually, after the meeting Beni and Elton were able to get signals from the scintillator (after increasing the HV) and started the DAQ (FDC+CDC) with the coincidence trigger.
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- Beni: testing the latest fADC125 firmware in ROCFDC2. This version has some fixes that Cody did based on the problems Beni found last week. For these tests needs DAQ with software trigger. ROCFDC3 has problems: works at the beginning but later has no valid data.
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- Discussions about horizontal trigger. We need to install it back. The upstream paddles can be installed when the target is out. Instead of the downstream paddles one can use the TOF, but it requires the GTP.  
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- Lubomir: according to Sasha he made a big progress with the GTP using BCAL north side. There are some minor issues but expect soon to have the BCAL up/down coincidence trigger. When it's ready we have to move the CDC/FDC trigger electronics from the bottom to the top trigger crate. The fan on the bottom trigger crate was replaced and there are no more spare fans; not clear what the problem is with these fan units.
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== CDC update ==
 
== CDC update ==
  
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- Mike showed curved tracks (linked) in the CDC at 600A magnetic field. Some local curvatures seen can be explained if the drift time is taken into account.
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- Fernado: working with Nick on the CDC noise from the CAEN supply. Contacted CAEN people: they are trying to be helpful. Grounding of the aluminum ring didn't help. They found two HVBs next to each other, one (C5) is very clean while the other (C6) has huge noise varying from channel to channel. Will use them to troubleshoot the noise. The swapping of HV connectors, or moving HV wires didn't change anything. Tomorrow will continue with
  
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- Fernado: additional ground on the CDC aluminum ring to which the HV is connected has been installed. Expect to reduce the noise significantly. Grounding the HVBs directly will be done as a last resort and it will be done in a different way through the grounding lugs.
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== FDC update ==
 
== FDC update ==

Revision as of 18:00, 28 August 2014

August 28, 2014 FDC+CDC meeting

Agenda

  1. DAQ (Beni)
  2. CDC status (Mike, Beni)
  3. FDC status (Vlad, Lubomir)
  4. Electronics (Chris, Nick)
  5. Engineering (Bill)
  6. Commissioning Wiki Page (all)
  7. Other

Instructions for Bluejeans meeting connection

FDC meeting ID: 290664653

Minutes

Participants: Curtis, Naomi (CMU), Sean (NU), Beni, Luke, Chris, Nick, Bill, Fernando, and Lubomir (JLab).

DAQ

- Beni: testing the latest fADC125 firmware in ROCFDC2. This version has some fixes that Cody did based on the problems Beni found last week. For these tests needs DAQ with software trigger. ROCFDC3 has problems: works at the beginning but later has no valid data.

- Lubomir: according to Sasha he made a big progress with the GTP using BCAL north side. There are some minor issues but expect soon to have the BCAL up/down coincidence trigger. When it's ready we have to move the CDC/FDC trigger electronics from the bottom to the top trigger crate. The fan on the bottom trigger crate was replaced and there are no more spare fans; not clear what the problem is with these fan units.

CDC update

- Fernado: working with Nick on the CDC noise from the CAEN supply. Contacted CAEN people: they are trying to be helpful. Grounding of the aluminum ring didn't help. They found two HVBs next to each other, one (C5) is very clean while the other (C6) has huge noise varying from channel to channel. Will use them to troubleshoot the noise. The swapping of HV connectors, or moving HV wires didn't change anything. Tomorrow will continue with


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