yaping$wang,$zhenyuye$ (uic) outline$ypwang/ist_teststand/ist... · 2012-12-6 2 ist$teststand@$uic...
TRANSCRIPT
2012-12-6 1
IST test stand @ UIC Yaping Wang, Zhenyu Ye
(UIC)
Outline • IST test stand @ UIC • Test stand checking
IST status @ UIC – Yaping Wang
2012-12-6 2
IST test stand @ UIC
IST status @ UIC – Yaping Wang
IST test stand at UIC 1. 8’ X 8’ clean room 2. Test stand setup
þ Hardware: 1. IST readout crate 2. Sensor bias power supply 3. ARM boards, ARC board, ABC boards, PPB
boards, T-‐boards, cables 4. DAQ PC 5. Cosmic trigger
þ SoWware: 1. DAQ soWware (cvs) 2. Slow control 3. Analysis code (ARMdisplay.C, wriYen by Gerrit)
3. IST stave prototype (IST-‐04A) connected for cosmic run
2012-12-6 3
Slow control
IST status @ UIC – Yaping Wang
2012-12-6 4 IST status @ UIC – Yaping Wang
Test stand checking – VPHASE_ADC The test stand @UIC is iden]cal to the one @ BNL except for length of signal cables. The parameter VPHASE_ADC sedng for APV is sensi]ve to the cables’ length. As the APV ADC ]ming tuning method suggested by Gerard, the sampling phase for ADC should be close to the case as shown in Figure as below:
APV header
0
1
0.65
APV analog channel data
The first sample of a transi]on from 0 to 1 needs to be at 0.65.
2012-12-6 5 IST status @ UIC – Yaping Wang
Cosmic test @ UIC
Pedestal level
Noise level
Hit map
with sensor without sensor
Noise
MIP signal
S/N
ADC pulse
Pedestal corrected ADC value at ]mebin 0 Compared to the results taken at
BNL (see next slide): 1) The pedestal and noise keep at
the same levels (using the same analysis code).
2) The MPVs from the MIP signal fidngs are close (490 ADC counts at BNL, 510 ADC counts at UIC).
3) The spread of the MIP signal is larger than the BNL results.
VPHASE_ADC = 0.591
Timebin posi]on of maximum
~ 0.65
2012-12-6 6 IST status @ UIC – Yaping Wang
Cosmic test @ BNL – for crosscheck
VPHASE_ADC = 1.200
> 0.65
Difference in MIP signal distribu]on under inves]ga]on.
Thanks!