CERN 904 RPC upgrademeeting 04 SEP2013 Dong hyun Kim on behalf of the cern904 team Department of physics sungkyunkwan university korea 1 Content Status of new Gap amp Package ID: 495295
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Slide1
CHAMBER PRODUCTION AT CERN 904
RPC upgrade-meeting, 04.SEP.2013Dong-hyun Kim on behalf of the cern-904 teamDepartment of physics, sungkyunkwan university, korea
1Slide2
Content
Status of new Gap & PackageStatus of ChamberPlan2Slide3
1. Status of new Gaps
We received a new 11 set Gaps from KODEL at 20.Aug
3Slide4
1. Status of new Gaps
Package
WET
The screw is rusted shut and won’t open
Need a RUST SOLUTION
4Slide5
1. Status of new Gaps
New Gaps – 11 setReject Gaps
No.
Gap nameReason1
TN052
Bubble
2
TN054
Pocked on bottom side
3
TN056
Huge bubble on bottom side
4
BO46
Bubble
5Slide6
1. Status of new Gaps
TN052
Bubble
Small pocked
6Slide7
1. Status of new Gaps
TN054
Pocked
7Slide8
1. Status of new Gaps
TN0568Slide9
1. Status of new Gaps
BO469Slide10
1. Status of new Gaps
Dark current resultAmong 10 gaps, 7 gaps failedSymptom – 4μA / 6 kV( Higher Current )Try to dry with Argon gas -> Unimproved gapsConjecture : Damage gaps by too much higher Humidity
10Slide11
2. Status of Chamber
CERN 904 site built11
TYPE
RE4/3
RE4/2
Production
26
72.22%
30
83.33
%
Successfully tested
19
52.78 %
24
66.67
%
Chamber to be test
7
19.4 %
6
16.67 %
* At
03
.Sep.2013Slide12
2. Status of Chamber
Transfer to QC412
TYPE
SITE
RE4/3
RE4/2
CERN
26 (72.22%)
30 (83.33%)
GEANT
14 (38.89%)
0
BARC
0
8
(
22.22%)
TOTAL
40
38
* At
03
.Sep.2013Slide13
3. PLAN
Darkcurrent test for a New gapsBuild a New chambers13