Difference between revisions of "Minutes-3-7-2013"

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# Tests at EEL126 [https://halldweb1.jlab.org/elog-halld/FDC FDC E-log] (Beni)
 
# Tests at EEL126 [https://halldweb1.jlab.org/elog-halld/FDC FDC E-log] (Beni)
 
# Other
 
# Other
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−
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= Minutes =
 
= Minutes =
  
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Participants: Eugene, Dave, Chris, Nick, Simon, Beni, and Lubomir.
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Participants: Bill, Dave, Chris, Nick, Simon, Beni, and Lubomir.
  
 
== Production ==
 
== Production ==
  
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- Dave for the spare parts: working on the last cathodes #87, 88, 89. These have been tensioned and we are working now on the daughter cards. We will build also an extra-spare cathode #90; the foils have been glued for it.  
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- Dave: one more cathode with the daughter cards installed. Chris and Nick finished the HV cabling/connectors for the last package (#2). The PR for Vision Machine (for the gas blocks and thick spacers) went through, Adam already contacted Bill with this respect.
  
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- As Casey proposed after the collaboration meeting, he replaced the six deadened wires (deadened area of 6cm diameter) of wire plane #2 with new wires. This will allow us to make 7.8cm deadened area, that is needed for the spare package. The wires are glued, will be soldered tomorrow and the tension tested.
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- We are planning to fix the HV problem in package #3 starting next week when the mounting table will be available. The problematic HV sector (#2, 20 wires) is in plane 6 (not 5! as in the previous minutes), so it will be easier since we will open it from the back of the package. Bill agrees this is doable.  
  
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- Spare wire plane #6 with wires strung but without HV caps, has been tested: 600/-60nA at 2100/-500V. Now Anatoly is installing the caps. 
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== Rebaselining update ==
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- Package #2: the grounding and the cooling tubes have been installed. Chris and Nick will come on Monday to do the HV connections. So far the package is still sitting on the mounting table.
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- Fixing the field HV sector in package #3: we started discussion about possible solutions. The problem is in cell #5 and one option would be to take the top 4 cells together. We have done this before. Still, more people (Casey, Dave) are inclined to open it plane by plane (as usual) but from the bottom side. The problem is that the spacer ring is screwed to the wire frame and we don't have access to the screws from the bottom. However it should be OK with more people to take them together. Before attempting this, Lubomir will test once more this HV sector; already stared flushing package #3 with regular gas and will bring the power supply to do the test.
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- For all of the FDC activities there are links in the above html file, explaining the scope, resources and bases for estimates. Within these links for some of the items there are additional links to documents used for these estimations. There are some items we were not sure about like: 25211210 (materials for cooling), 25211215 (materials for alignment/fiducials), 25211216 (materials for HV connectors). Bill thinks all the materials for the first two have been ordered. As for the HV connectors, we have all the connectors that we need for the FDC (Nick).
  
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== Rebaselining update ==
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== Installation ==
  
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- We are filling the html templates that Eugene created for each activity. Where available we link documents with more details (see the file linked above and click on the 25211191 activity for ex.). Eugene wanted to have all the activities finished in this manner by the middle of the next week.
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<!--
  
 
== Engineering ==
 
== Engineering ==

Revision as of 16:31, 7 March 2013

March 7, 2013 FDC meeting

Agenda

  1. Production Construction Tracking (Dave)
    • Spare parts
    • Package #2 status
    • Package #3 repair
  2. Rebaselining update [1](Lubomir)
  3. Installation schedule (Lubomir)
  4. Engineering (Bill)
    • Manifold installation
  5. Electronics (Chris, Nick)
  6. Tests at EEL126 FDC E-log (Beni)
  7. Other

Minutes

Participants: Bill, Dave, Chris, Nick, Simon, Beni, and Lubomir.

Production

- Dave: one more cathode with the daughter cards installed. Chris and Nick finished the HV cabling/connectors for the last package (#2). The PR for Vision Machine (for the gas blocks and thick spacers) went through, Adam already contacted Bill with this respect.

- We are planning to fix the HV problem in package #3 starting next week when the mounting table will be available. The problematic HV sector (#2, 20 wires) is in plane 6 (not 5! as in the previous minutes), so it will be easier since we will open it from the back of the package. Bill agrees this is doable.

Rebaselining update

- For all of the FDC activities there are links in the above html file, explaining the scope, resources and bases for estimates. Within these links for some of the items there are additional links to documents used for these estimations. There are some items we were not sure about like: 25211210 (materials for cooling), 25211215 (materials for alignment/fiducials), 25211216 (materials for HV connectors). Bill thinks all the materials for the first two have been ordered. As for the HV connectors, we have all the connectors that we need for the FDC (Nick).

Installation

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