HanbumRhee Log

MC Generation

Forward RPC

• RE 1/1 6chamber assembly

• 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

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_bottom	1
15:56	RE1/1-001_top	3
15:56	RE1/1-002_bottom	4
15:56	RE1/1-002_top	5
each channel-1 litter /hours

1. positioning for installation (about three empty chambers)

            succeed one chamber
       

in ISR start cosmic muon test RE1/1 chamber channel

HV channel set up

cosmic muon test

DAQ-cable lavel

LV

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

run No.5330~5340까지는 준비과정

in ISR cosmic muon test

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

  ----          ->scintillator
---------    ->scintillator

---------    ->scintillator

in ISR

1. cosmic muon test

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

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

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

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

15:30

gas system 변동에 대비할 수 있도록 kill 자리에 signal cable 연결

15:50

HV 전부 Down

지금까지 받은 data

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

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

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

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)

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

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

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

bubble발생에 focus

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

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

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

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)

1. ISR에서 불필요한 sample 정리
2. gap 정리

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