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

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# Production [http://www.jlab.org/Hall-D/detector/fdc/production/FDC_Construction_March_14_2013.xlsx Construction Tracking] (Dave)
 
# Production [http://www.jlab.org/Hall-D/detector/fdc/production/FDC_Construction_March_14_2013.xlsx Construction Tracking] (Dave)
 
#* Spare parts
 
#* Spare parts
−
#* Package #3 repair
+
#* Package #3 repair [http://www.jlab.org/Hall-D/detector/fdc/corrosion/IMG_0298.jpg cathode foil discoloration], [http://www.jlab.org/Hall-D/detector/fdc/corrosion/IMG_0295.jpg]
−
# Installation [http://www.jlab.org/Hall-D/detector/fdc/procedures/FDC_install.jpg schedule (last week)],  [http://www.jlab.org/Hall-D/detector/fdc/procedures/FDC_install3.jpg schedule (this week)](Lubomir)
+
# Installation [http://www.jlab.org/Hall-D/detector/fdc/procedures/FDC_install.jpg schedule (last week)],  [http://www.jlab.org/Hall-D/detector/fdc/procedures/FDC_install4.jpg schedule (this week)](Lubomir)
 
# Engineering (Bill)
 
# Engineering (Bill)
−
#* Manifold installation [http://www.jlab.org/Hall-D/detector/fdc/photographs/IMG_0333.JPG first pair isntalled]
+
#* Manifold installation [http://www.jlab.org/Hall-D/detector/fdc/photographs/IMG_0299.jpg], [http://www.jlab.org/Hall-D/detector/fdc/photographs/IMG_0301.jpg], [http://www.jlab.org/Hall-D/detector/fdc/photographs/IMG_0305.jpg],  [http://www.jlab.org/Hall-D/detector/fdc/photographs/IMG_0309.jpg], [http://www.jlab.org/Hall-D/detector/fdc/photographs/IMG_0311.jpg], [http://www.jlab.org/Hall-D/detector/fdc/photographs/IMG_0323.jpg]
 
# Electronics (Chris, Nick)
 
# Electronics (Chris, Nick)
−
# Tests at EEL126 [https://halldweb1.jlab.org/elog-halld/FDC FDC E-log] (Beni)
+
# Tests at EEL126 [https://halldweb.jlab.org/elog-halld/FDC FDC E-log] (Beni)
 
# Other
 
# Other
−
 
−
<!--
 
  
 
= Minutes =
 
= Minutes =
Line 20: Line 18:
 
== Production ==
 
== Production ==
  
−
- Dave (not at the meeting) prepared the Production Tracking: all cathodes foe the spare package are ready. We will built also one extra cathode that is tensioned now. Wire planes: Chris is coming tomorrow to Blue Crab to finish with the population of the last two wire planes. Then it will remain four wire planes (one will be extra spare) to be deadened and we are done with the spare parts.       
+
- Dave (not at the meeting) prepared the Production Tracking: all cathodes for the spare package are ready. We will built also one extra cathode that is tensioned now. Wire planes: Chris is coming tomorrow to Blue Crab to finish with the population of the last two wire planes. Then it will remain four wire planes (one will be extra spare) to be deadened and we are done with the spare parts.       
  
−
- On Friday package #1 was moved from 126 to Blue Crab and then package #2 - from Blue Crab to 126. After connecting #1 to Nitrogen it was found cell #5 is leaking; turned out the barb connector for the guage tube was loosely connected. These connectors are glued initially with super glue, but later on some of them (and not on this one) green epoxy was added. Casey was able to glue a new barb connector (not easy to reach the spacer ring  since you have only 5mm between the cathode and the wire frame) and fix the problem. Then green epoxy was added on all the connectors of packages #1 and #4 that didn't have it before (5 out of 12). Bill wants to try with Casey using shoe glue that better sticks to polyethylene.  
+
- On Friday package #1 was moved from 126 to Blue Crab and then package #2 - from Blue Crab to 126. After connecting #1 to Nitrogen it was found cell #5 is leaking; turned out the barb connector for the guage tube was loosely connected. These connectors are glued initially with super glue, but later on some of them (and not on this one) green epoxy was added. Casey was able to glue a new barb connector (not easy to reach the spacer ring  since you have only 5mm between the cathode and the wire frame) and fixed the problem. Then green epoxy was added on all the connectors of packages #1 and #4 that didn't have it before (5 out of 12). Bill wants to try with Casey using shoe glue that better sticks to polyethylene.  
  
−
-  
+
- 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.
  
−
== Rebaselining update ==
+
- 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 AC 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.
−
 
+
−
- 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 ==
 
== Installation ==
  
−
- Starting with this meeting we will have discussions about the FDC installations. The installation schedule linked above was made with FastTrack using the rebaseline-d schedule. Items not for FDC, but related/needed for the FDC installation (predecessors) are also included.  
+
- 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.
−
 
+
−
- First, it's not clear when we have to move out from Blue Crab. It was decided end of last year that the lease will be extended by one month (till Sep.23), but whether this will be done and how much time facilities need to remove everything from there is not clear. For now we plan to stay there (at least to keep the FDC packages) till Aug. 23. If this is not the case we have to find a good temporary place for the FDC. We were talking also about what will happen with the clean room; everybody says destroying it will be wasting of a lot of money. We also have to find space for all the equipment/tooling so that we will be able to do fixes later if needed. Chris proposed to bring the most valuable tooling to 117.
+
−
 
+
−
- The rails on the platform have to be installed before the FDC appears in the Hall. So far there's no timing issue with that but it's tight. There's maybe a contradiction between BCAL installation and rail mounting that Tim has to address. We depend also on the cable preparations that will be finished just before we start connecting the cables. In any case the schedule as it is, looks fragile
+
−
and we may have to find temporary place for the FDC if there are delays.
+
−
 
+
−
- The timing of the crate installation also contradicts with the timing of the cabling. The crates/modules have to be there, for the cables to be connected, routed and service loops made. Now the crate installation finishes at the same time when the cable installation finishes; we are not sure if and how this will work.
+
−
 
+
−
- The insertion of the FDC is planned for middle of November, and before that (from middle of October) we will be testing the packages extensively. No fixes can be done after the FDC is inserted. Beni listed the main items needed for the tests: trigger from scintillators (possibly  a pair of paddles for each package, or just two that we will move). We need to work with up to 8 crates and Beni thinks this is the limit when using the modules that are in these crates only (ROCs, TIs). Another trigger option will be to have self-triggering from the fADC125s and F1TDCs; Fernando promised to look if this is possible. We expect the gas system to be ready by that time.
+
  
 +
- 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?
 +
 
== Engineering ==
 
== Engineering ==
  
−
- 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).
+
- 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 the 210deg manifold.
−
 
+
−
- 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.
+
−
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).
+
−
 
+
−
- 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.
+
  
 
== Tests at EEL126 ==
 
== Tests at EEL126 ==
  
−
- Beni is almost at the end of testing package #1 (just one more run) and promised perfect results to be presented at the next meeting.
+
- Beni showed HV and threshold scan of package #1 (entry 107 in the FDC E-log). There were some problems in some of the runs at lower HV, but in general the plateau starts at 2050V for 5V threshold and at 2100V at 7V. Beni went up to 2200V and the HV was stable.
−
 
+
−
- The plan is to get the truck tomorrow (hopefully morning) to move package #1 to Blue Crab, take the strong back and install it on package #2, then in the afternoon bring #2 for testing at EEL126.
+
  
−
-->
+
- Package #2: Beni already tested the strips of four cells and all the wire channels (except few with noisy electronics) and all channels were OK.

Latest revision as of 23:59, 31 March 2015

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

Minutes

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

Production

- Dave (not at the meeting) prepared the Production Tracking: all cathodes for the spare package are ready. We will built also one extra cathode that is tensioned now. Wire planes: Chris is coming tomorrow to Blue Crab to finish with the population of the last two wire planes. Then it will remain four wire planes (one will be extra spare) to be deadened and we are done with the spare parts.

- On Friday package #1 was moved from 126 to Blue Crab and then package #2 - from Blue Crab to 126. After connecting #1 to Nitrogen it was found cell #5 is leaking; turned out the barb connector for the guage tube was loosely connected. These connectors are glued initially with super glue, but later on some of them (and not on this one) green epoxy was added. Casey was able to glue a new barb connector (not easy to reach the spacer ring since you have only 5mm between the cathode and the wire frame) and fixed the problem. Then green epoxy was added on all the connectors of packages #1 and #4 that didn't have it before (5 out of 12). Bill wants to try with Casey using shoe glue that better sticks to polyethylene.

- 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.

- 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 AC 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

- 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.

- 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?

Engineering

- 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 the 210deg manifold.

Tests at EEL126

- Beni showed HV and threshold scan of package #1 (entry 107 in the FDC E-log). There were some problems in some of the runs at lower HV, but in general the plateau starts at 2050V for 5V threshold and at 2100V at 7V. Beni went up to 2200V and the HV was stable.

- Package #2: Beni already tested the strips of four cells and all the wire channels (except few with noisy electronics) and all channels were OK.

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