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RPC Gas Task Force - Meeting 15
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Europe/Zurich
40/R-B10 (CERN)
Report from ATLAS
During vacation no backup gas, everything was closed but probably
air went into pipes.
First week of Jan start flowing the standard mixture. Many test were
planned but due to problems each sector was purged one by one. Due to
these problems 50m3 gas lost (no gas recycling because of complexity of
procedure and relevant manpower missing). Argon tests imminent
In the maintainance period is planned to map the gas replenishment rate and the gas quality itself as a function of the chamber volume and 'pockets'.
CMS
Maintaince period is finished. We are starting switching on the wheels.
GC: the design is ready, we are waiting only for the budget code. GC
will analyze all the stations (and other detectors) but the installation and testing of the
system will take a few months (one month for the delivery).
Next week, gas will be back to CMS.
IR analyzer before vacation was ok, it is hoped to be ok also now.
We are going to start with 4,5% Isobutane but we must use a second IR
which will be connected directly to DSS.
GIF
We are going to restart the gas and tests, the goal is to choose a
combination of purifiers and to put some chamber in closed-loop mode. A
powerful database with all the information about radiation. gas
quality and environmental variables has been developed and will be
available to all soon.
Another smaller (30 x 30) chamber and samples of Bakelite wil also be put up for irradiation.
GGM
The system is moved to CMS, we are waiting for the complete
installation of services requested, before substituting plastic tubes
with stainless steel.
ISR
RE2 tests indicate all chamber currents are goood. Humidity has been increased to 60% for a week. Next Temperature will be increased in two steps 22 and 24 deg.
The test is going on without problems, we are going to take a new sample
for the chemical setup; currents are still under control, quite
stable.
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