Difference between revisions of "Minutes-3-14-2013"

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- Package #3 repair: on Tuesday hubs were installed on the top side and the package put upside down on the installation table. To access cell #6 we had to remove only the end window and the bottom cathode (type-3). We found 1-2mm hair/lint on a field wire in HV sector 2, exactly where the HV problem was. After removing it we closed the package and started flushing it. It took only 4 people for two hours for this operation, but placing back the ground clips, pre-amps, cooling tube (all had to be removed) and restoring the HV connections will take much longer. The plan is to start testing the package tomorrow.
 
- Package #3 repair: on Tuesday hubs were installed on the top side and the package put upside down on the installation table. To access cell #6 we had to remove only the end window and the bottom cathode (type-3). We found 1-2mm hair/lint on a field wire in HV sector 2, exactly where the HV problem was. After removing it we closed the package and started flushing it. It took only 4 people for two hours for this operation, but placing back the ground clips, pre-amps, cooling tube (all had to be removed) and restoring the HV connections will take much longer. The plan is to start testing the package tomorrow.
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- Pictures on the copper side of the cathode type-3 from package #3 are linked above. There's again some discoloration in the area that sits against the G10 of the wire frame. We had this when keeping the cathode moist over night when we started the production. One can see the G10 fiber pattern, so the explanation could be that some moisture got trapped there, most likely when there were problems in 126; this package was there for many months before the two new AC units were installed. From previous experience we know the copper is still conductive even it changes color. 
  
 
== Installation ==
 
== Installation ==
  
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- This week there were significant changes in the re-baselined schedule. The last- and this-week-schedule related to the FDC installation are linked above. Almost all of the FDC installation activities are delayed by 1-2 months, so the insertion into the magnet happens in the beginning of January 2014. From Eugene we know the big change is a result of a manpower spike that had to be smooth out. Beni: if this is the case probably additional manpower from the universities could help. However, Beni learned from Fernando the real reason is the the timing of the receiving of the fADC125 and F1TDC, and their testing/installation in the crates and racks and here students could not help. Expect more discussions in the coming meetings.
  
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- In this case the chance that we will have to leave Blue Crab but the infrastructure in the Hall will not be ready for the FDC installation, is very big. According to Rusty Sprouse the plan for Blue Crab is to extend  the lease by one month (till the end of September), but has not been done yet. In the best base we will have to leave end of August, but the installation will start in October according to the new schedule, so we need to find a storage space. ESB has climate control but is very dirty. Bill: what about space in TDEF? Beni: can we move the clean room (or part of it) from Blue Crab to the ESB?
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== Engineering ==
 
== Engineering ==
  
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- Bill with the help of Casey, started forming/cutting the cooling tubes on package #4 to install the manifolds. The procedure worked OK (except for the thread of one manifold) with some minor modifications. The first pair was mounted after the meeting (see picture above attached).
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- Bill and Casey finished the manifold installation on package #4. Bill explained details of the procedure using the pictures linked above. Next step is to do tests with pressured gas at Blue Crab. For the rest of the packages, Bill has to do some modifications on the plastic brackets that are used at 210deg manifold.  
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- As it turned out at the end of last week, we have all the power needed for 126: 3-phase 208V and 110V/15A for the VXS crates. One crate with 15 F1TDCs worked with such power for many months.
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Since we have power for the SMC chiller it will be used for the tests with the full electronics. The chiller has been cabled already. We need also the water chiller that we borrowed from the FEL, but it needs fixes for $1.8k (PR submitted for that).
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- To do the cooling system test with one cell, Bill needs ~20 pre-amp brackets (Nick may have them). Casey worked on the hardware for this test.
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== Tests at EEL126 ==
 
== Tests at EEL126 ==

Revision as of 18:19, 14 March 2013

March 14, 2013 FDC meeting

Agenda

  1. Production Construction Tracking (Dave)
  2. Installation schedule (last week), schedule (this week)(Lubomir)
  3. Engineering (Bill)
  4. Electronics (Chris, Nick)
  5. Tests at EEL126 FDC E-log (Beni)
  6. Other
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