Plan as we decided in Calcutta meeting

1
Plan as we decided in Calcutta meeting PS 3
weeks SPS 1 week expected time sept-october06
Plan Testing with full operational system Take
usual data for detector parameters and calibration
2
Operational system 6 modules (lots of
discussion about the need of too many modules)
We wanted to have full-like system and
background and effect of other modules can be
tested Full DCS Control of chamber HV, LV
(electronics and CROCUS) (pressure??) Full
DAQ CROCUS GDC-config MRDMs Spark Monitor
(mainly at SPS) Analysis Test-beam version of
aliroot
This should give good idea about the operation of
whole system
3

• Data
• HV scanning with MIP
• Background estimation (away from hit zone)
• Operating voltage??
• Usual MIP characteristics (mean/MPV, no of cells
  etc)
• Electron for calibration curve (as many points as
  possible)

4
Preparation and some related story Time was
uncertain fixed at the last moment Oct 5-11th
SPS Oct 15th for 3 weeks PS some
parasite Shipped materials 2 packets one
returnable, one non-returnable Some items
modules electronic boards CROCUS MRDMs
system LVDB High Voltages LV Personnel
GSNM, Sushanta, SRN, Saini,Anik, Nandi,Ajay,
Mriganka, Siddharth, Prabhat, lokesh,
Satish,Subhasis, Rashmi Tapan, Sudhir, MMA

5
Packets with electronics didnt reach till 15th
october. SPS test was to be a washout, we made
some attempts (i) setup the detectors (ii)
MRDM connected his spark meter with one layer
equipped with shorting connector. (iii)
Sushanta/Rama setup Cagliardi-based DAQ (iv)
Took some data and with zero-V, data didnt look
like pedestal. The issue of delay came up (v)
MRDM looked for spark by raising the voltage upto
1600 (vi) The rate was too high (radiation alarm
set off) (vii) Anik gave HV using DCS
6
PS Electronics reached on 15th and were setup
DCS problem with LV, controller not
recognised CROCUS setup but too
fragile.. LVDB/LV Trip was rather frequent and
later LVDB was removed HV Almost no trip
(larger limit??) Data (LDC) Readable using
Sushantas stand-alone routine GDC-rootified Not
readable initially, will know latest
7
Data 41 fold coincidence MIP (voltage scan
delay scan) Background estimation Cell to
cell 41 and 4 fold data, not much
usable Electron 2 1 coincidence good data
2,3, 6 GeV 1375 and 1400V Lots of saturation
at 1400V, needs careful analysis for operating
voltage