HanbumRhee Log

MC Generation

Forward RPC

  • RE 1/1 6chamber assembly
status
Chamber inner gap coaxial cable electonics cosmic test
1 x x x x
2 x x x x
3 x x
4 x x
5 x
6 x
  • cosmic-muon test -in ISR

  • preperation for installation of RE1/1 -in point 5
    • check HV cable(endcap region)
    • gas-system, cooling-system

Daily Plan &status

14.Jan.2009

in ISR

  1. coaxial cable(from korea) Q.C -> complete
  2. FEB -> coxail cable -> complete
         check pin
         connect smooth
         well lock
      
  3. make cupper sheet-4 sets -> complete
  4. make mylar -4 sets -> complete

gas flow test

time chamber channel
15:56 RE1/1-001_top 3
RE1/1-001_bottom 1
RE1/1-002_top 5
RE1/1-002_bottom 4
each channel-1 litter /hours
in P-5
  1. positioning for installation (about three empty chambers)
             succeed one chamber
        

15.Jan.2009

in ISR start cosmic muon test RE1/1 chamber channel

elec.map A00 A01 A02 A03
strip 1~16 17~32 1~16 17~32
FEB 1~16 17~32 32~17 16~1

HV channel set up

gap ch station box box_ch
RE1/1-001_bot 0 10 7 1
RE1/1-001_top 1 10 7 2
RE1/1-002_bot 2 8 3 3
RE1/1-002_top 3 8 6 1

cosmic muon test

time HV(kV) chamber current time HV(kV) chamber current
11:07 0.50 001_bot 0.02 14:30 4.00 001_bot 0.04
001_top 0.00 001_top 0.04
002_bot 0.01 002_bot 0.03
002_top 0.00 002_top 0.00
11:12 0.75 001_bot 0.02 14:35 6.00 001_bot 0.05
001_top 0.01 001_top 0.05
002_bot 0.01 002_bot 0.03
002_top 0.00 002_top 0.02
11:27 1.00 001_bot 0.03 14:40 8.00 001_bot
001_top 0.02 001_top
002_bot 0.02 002_bot
002_top 0.00 002_top
11:27 1.50 001_bot 0.03 14:45 9.00 001_bot 0.07
001_top 0.02 001_top 0.09
002_bot 0.02 002_bot 0.05
002_top 0.00 002_top 0.04
11:27 1.75 001_bot 0.03 14:50 9.20 001_bot 0.07
001_top 0.02 001_top 0.09
002_bot 0.02 002_bot 0.04
002_top 0.00 002_top 0.04
11:27 2.00 001_bot 0.03
001_top 0.02
002_bot 0.02
002_top 0.00

DAQ-cable lavel

RE1/1-001 D station 8 A1 A2
C station 7 C1 C2
B station 7 B1 B2
A station 7 A1 A2
RE1/1-002 D station 9 B1 B2
C station 9 A1 A2
B station 8 C1 C2
A station 8 B1 B2

LV

RE1/1-001 ch 6
RE1/1-002 ch 8

15:37 5000 events start

16:32 missing channel 생김

연결을 다시 함 station 8.9 연결

16:44 event 5000개 받음

           run No. 5325,run No. 5326
           monitorring을 위해서 station을 현재 3개에 걸쳐 나오는 채널들을 2개로 옮기기 위한 시도

run N0. 5327

station4-RE1/1-001

station5-RE1/1-002

17:20 50,000events 시작 -> run No.5329

station No. st.4 st.5
cluster size 1.29 1.39
efficiency 48.6% 52.0%

run No.5330~5340까지는 준비과정


16.Jan.2009

in ISR cosmic muon test

time HV(kV) chamber current
08:15 9.20 001_bot 0.07
001_top 0.08
002_bot 0.04
002_top 0.03

 PMT가 크기 때문에 efficiency가 낮게 나왔다고 결론 PMT size가 작은 것을 이용해 다시 test

  ----          ->scintillator
---------    ->scintillator
RPC
---------    ->scintillator

19.Jan.2009

in ISR

  1. cosmic muon test
cosmic muon test
time HV(kV) chamber current
10:20 9.20 001_bot 0.07
001_top 0.08
002_bot 0.04
002_top 0.03

efficiency가 낮게 나와서 sintillator와 test chamber사이에 있던  chmber(RE2)를 치우고 chamber바로 위에 scintillator를 두고 start again


20.Jan.2009

in ISR

  1. preperation to gas pipe(change system(1supply+1return -> 2supply+2return) -> =complete
  2. cosmic muon test(Cont.)

in P-5

  1. check HV-cable(Cont.)
  2. mapping for gas-system,cooling-system


21.Jan.2009

in ISR

  1. soldering coxial cable on top-gap for 4th chamber -> =2/3 chambers
  2. cosmic muon test(Cont.)

in P-5

  1. check Hv-cable(Cont.)
    Still one channel occur problem. --> one of connector failed. Now, use only 9 connectors.
  2. fitting gas-lines


22.Jan.2009

in ISR

  1. soldering coaxial cable on top-gap for 4th(1/3) & 5th chamber
    finish soldering coaxial 4th & 5th 
  2. cosmic muon test(Cont.)

in P-5

  1. check Hv-cable(YE- far)(Cont.)
  2. fitting gas-lines finish

23.Jan.2009

in ISR

  1. assembly chamber(4th)
  2. cosmic muon test(Cont.)

in P-5

  1. take off chambers(4th,5th,6th)

cosmic muon test

time HV(kV) chamber current
08:00 9.60 001_bot 0.06
001_top 0.07
002_bot 0.06
002_top 0.04

15:30

gas system 변동에 대비할 수 있도록 kill 자리에 signal cable 연결

15:50

HV 전부 Down

지금까지 받은 data

Run No. HV(kV) RE1/1-001 RE1/1-002
5341 8.8 34% 55%
5342 9.0 57% 75%
5343 9.2 88% 88%
5344 9.4 95% 93%

RPC-KR Meeting (in ISR, K.S.LEE, H.C.KIM, H.B.RHEE)

  1. chamber translation(28. 1 .09) 나무box를 준비해야함 11:00 pick-up
  2. gas-pipes 디자인을 확인해야함
  3. gas distribution box에서 connector를 교체해야 함
  4. Documentation (.doc_file) TDR을 위해
  5. HV block connector
  6. Temperature sensor

25.Jan.2009

  1. soldering coaxial cable 4th&5th finish,6th 1/3
  2. cosmic data(at 9.6kV)
  3. chamber position test


26.Jan.2009

in ISR

  1. soldering coaxial cable 6th 1/2 finish
  2. chamber position test finish
  3. 3rd chamber HV test 2kV

in P-5

  1. remove dummy chambers

27.Jan.2009

in ISR

  1. soldering coaxial cable finish
  2. 3rd chamber HV test
          7000V에서 0.7까지 current가 오르는 현상이 일어나서 
          gas flow를 2litter/hour로 바꾸고 6500V에서 test 시작
          현상태는 0.13~0.16까지 계속 fluctuation
          
  3. gas connection mapping =make map for connection (Auto CAD)

28.Jan.2009
  1. real mapping (using 5th & 6th chamber)
  2. assembly for 4th chamber


29.Jan.2009
  1. assembly for 4th chamber complete
  2. make gas-connector sample
  3. modify top cover of chamber 5th & 6th

2.Feb.2009

3rd chamber의 current가 계속 높게 나와 HV cable connector를 다시 만들기로 정함

bubble발생에 focus


3.Feb.2009

RE 1/1_003 Bottom 0.22

5th, 6th chamber bottom 프레임에서 inner gap이 뜨는 현상 발생 HV block 부분의 mylar가 문제라 추정 토의 후 제거할 예정


4.Feb.2009

  1. 5th chamber bottom의 HV block 부분을 제거해 구멍을 내보기로 함
  2. top cover(5th & 6th)의 나머지 assembly부분을 하기로 함


5.Feb.2009
  1. Bottom cover에 구멍내고 디자인 변경 35*55 -> 55*55 뚜껑문제 해결
  2. 5th chamber assembly finish
  3. 6th chamber는 완전 제거하지 않고 긁어내는 방식사용
*RE1/1 meeting(in ISR)
  1. cable service에 대한 도움을 줘야함
  2. Assembly & Q.C에 대한 documentation필요
  3. triggering sector,cooling,Documentation => end of March
  4. Next meeting (at monday 10:30)

6.Feb.2009
  1. ISR에서 불필요한 sample 정리
  2. gap 정리
inside-lab reuse fresh repair
outside-lab old gap

11.Feb.2009
  1. 4th ,5th,6th chamber 완성
  2. gas flow test start(각 chamber에 bottom에 단선으로 공급 return을 top에 공급 //gas distribution line이 6개밖에 없음)

Data handling of RPCs

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Topic revision: r19 - 2009-09-28 - HanbumRhee
 
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