Validation of CSCs at FNAL

1
Validation of CSCs at FNAL

• Why we decided to proceed with CSC Validation
  works?
• 1. We have not enough testing experience in EMU
  CMS project..
• 2. At the time, when FAST sites will be able to
  test CSCs at full speed
• FNAL already will assemble 25-40CSCs. And this
  is wrong not to have quick feedback to
  production floor
• 3. Production Readiness Committee strongly
  recommend to test at least 20 CSCs at FNAL. in
  parallel with production

2
CRTS at LAB711 scale prototype of FAST site
Trigger Scintillating
Counters

• Steel Hardener

Picture of FNALs CRTS - as a full scale
prototype of UF and UCLA FAST sites , during
last couple years role of LAB7 facility was test
of first several prototypes, troubleshooting
before CERN test-beam, etc
Today this is facility for CSC integration
efforts Validation of 20 first production CSCs.
3
CSC VALIDATION Tests

• 1. HV scan of all 6 planes with/without Cs137
• (darksource currents)
• 2. Gas gain non-uniformity with Cs137 source
  (HV3700V)
• 
  
• 3. ZERO DEAD channels (anode cathode)
• 4. Anode wire groups (64group/plane) efficiency
  measurements
• 5. Single wire (group) noise rate (TDC)
• 6. Gas gain non-uniformity with Cosmic Rays
  measurements (CFEB)

4
2. Gas gain uniformity measurementswith Cs137
source (HV3700V).
Cs137 measurements correction according
radiation profilefor one layer
(layer6,ME23/2-003)
5
Cs137 .vs. Cosmic Rays(ME23/2-003)
layer 1
layer 3
Cosmic Rays
Cs137
6
Cosmic Rays .VS. Cs137
Gas Gain non-uniformity for ME23/2-003Cs137
Cosmic Rays
Correlation between Cs137 Cosmic ray
7
4. Anode wire groups (64group/layer) efficiency
measurements
8
4. Anode wire groups (64group/layer) efficiency
measurements
9
Single wires group Noise (TDC)
10
Summary

• Panels Production
• Production Rate and Quality of Panels are under
  control
• 100 of ME23/2 panels (for 148CSCs) will be done
  next week !!!
• Next step is start production of Panels for
  PNPI(Russia) IHEP(China) CSCs Factories.
• Chambers Assembling
• FNAL Factory reached assembling rate 2
  chambers per month
• 14 CSCs have been assembled at MP9 already
• Tooling, QC/QA, trained technical personal on
  place (going through learning curves !!!)
• CSCs Validation
• LAB7 CRTS facility is a place for 20 CSCs
  Validation work
• We have tested 9 CSCs already, and accumulated
  important experience for FAST Sites operation
• Results from test of 9 CSCs shown NO SURPRISE
• Support of Foreign Factories
• FNAL designed, built and ship critical tooling
  to Russia and China
• Trained at MP9(FNAL) technical personal for
  foreign factories tech. from R.C. built
  ME1/22/11/33/1 prototypes at FNAL physicists
  from RC participated at FAST sites planing and
  development