Difference between revisions of "Minutes-4-4-2013"
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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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= Minutes = | = Minutes = | ||
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== Production == | == Production == | ||
− | - Dave: | + | - Dave: will start wire deadening tomorrow; wire frames #2 and #3 will be the first to go with. In total 4 wire frames have to be deadened. |
− | - Package #3 repair: | + | - Package #3 repair: we scanned all the wires of the HV sector #2 (on the wire frame of cell #6) using the camera of the motion station on the stringing table. There were three field wires with some stuff we could not clean. We disconnected these wires from the HV side, by un-soldering and cutting the end of the wire, but without success: the HV problem remained. Then we removed half of resistors at the HV side of the sense wires and the problem went away. Using this method we went down to 5 questionable wires, and at his moment Anatoly found a tip of a sense wire (~5mm) sticking out of the solder. After fixing this, the chamber now is holding HV already 10 hours. We will wait till tomorrow and then Casey will replace the three field wires, so the wire plane will be ready for installation by Monday. |
== Installation == | == Installation == | ||
− | - | + | - Yesterday, there was a "FDC cable installation" meeting on which Rich Getz presented his new plan shown on the three pictures attached above. |
− | + | == Engineering == | |
− | - | + | <!-- |
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− | + | ||
- Bill and Casey tested the cooling of package #4 that has the manifolds installed: first with CO2 at 100psi and then with Flurinert, pressured again with CO2. No significant leakage was found with CO2, but with Flurinert it was leaking like a sieve (Bill) however mostly at the temporary barb connections needed to do the test, while the compression connections didn't show obvious problems. It turned out the leakage detector we have is not very sensitive to Fluorinert. So, for the next test we need better fittings and leakage detector. | - Bill and Casey tested the cooling of package #4 that has the manifolds installed: first with CO2 at 100psi and then with Flurinert, pressured again with CO2. No significant leakage was found with CO2, but with Flurinert it was leaking like a sieve (Bill) however mostly at the temporary barb connections needed to do the test, while the compression connections didn't show obvious problems. It turned out the leakage detector we have is not very sensitive to Fluorinert. So, for the next test we need better fittings and leakage detector. |
Revision as of 16:34, 4 April 2013
April 4, 2013 FDC meeting
Agenda
- Production Construction Tracking (Dave)
- Package #3 repair
- Installation (Lubomir, Bill)
- Engineering (Bill)
- Cooling system status [4]
- Electronics (Chris, Nick)
- Tests at EEL126 FDC E-log (Beni)
- Other
Minutes
Participants: Fernando, Eugene, Bill, Dave, Chris, Nick, Simon, Beni, and Lubomir.
Production
- Dave: will start wire deadening tomorrow; wire frames #2 and #3 will be the first to go with. In total 4 wire frames have to be deadened.
- Package #3 repair: we scanned all the wires of the HV sector #2 (on the wire frame of cell #6) using the camera of the motion station on the stringing table. There were three field wires with some stuff we could not clean. We disconnected these wires from the HV side, by un-soldering and cutting the end of the wire, but without success: the HV problem remained. Then we removed half of resistors at the HV side of the sense wires and the problem went away. Using this method we went down to 5 questionable wires, and at his moment Anatoly found a tip of a sense wire (~5mm) sticking out of the solder. After fixing this, the chamber now is holding HV already 10 hours. We will wait till tomorrow and then Casey will replace the three field wires, so the wire plane will be ready for installation by Monday.
Installation
- Yesterday, there was a "FDC cable installation" meeting on which Rich Getz presented his new plan shown on the three pictures attached above.