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DØ Collab Meeting April 27, 20011
Leslie GroerColumbia University DØ Calorimeter Status
1
DØ Calorimeter Status
Z
y
x
p
Liquid argon sampling Stable, uniform response,
rad. hard, fine spatial seg. LAr purity important
Uranium absorber (Cu or Steel for coarse hadronic)
Compensating e/ 1, dense compact
Uniform, hermetic with full coverage
< 4.2, int total) L. Ar in gap 2.3 mm
Ur absorber3, 4 or 6 mm Cu pad readout on 4.6 mm
G10 with resistive coat epoxy
p_
Energy Resolution e: E / E = 15% /E+ 0.3% (e.g. 3.7% @ 20 GeV)
: E / E = 45% /E + 4% (e.g. 14% @ 20 GeV)
ICD
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DØ Collab Meeting April 27, 20012
Leslie GroerColumbia University DØ Calorimeter Status
2
Run II Calorimeter Electronics
55K readout channels Replace signal cables from cryostat to preamps (110 30) Replacement of preamps, shapers, baseline subtraction circuitry (BLS) Addition of analog storage: 48-element deep Switched Capacitor Array – SCA New Timing and Control New calibration pulser + current cables
Preamp/Driver
Trig. sum
Filter/Shaper
x1
x8
SCA (48 deep)
SCA (48 deep)
SCA (48 deep)
SCA (48 deep)
BLSOutputBuffer
Bank 0
Bank 1
Replace cablesfor impedancematch
new low noise preamp & driver
Shorter shaping~400ns
SCA analog storage> 4sec, alternate
Additionalbuffering for L2 & L3
SCA
new calibratedpulse injection
BLS Card
DETECTOR
DD
DØ Collab Meeting April 27, 20013
Leslie GroerColumbia University DØ Calorimeter Status
3
Calorimeter Electronics Status
Preamp All tested and installed (1152 motherboards x 48 preamps = 55k) ECS recabled after being off platform All 24 + 1 ICD power supplies installed All calibration pulsers installed, cabled, tested and commissioned Commission preamps and readout chain Fix known broken cables in shutdown
BLS 36/36 PS installed + 3 spares; 12 BLS fanouts installed >10/12 quadrants populated (964/1152).
Need 200 more (~100 for high eta – MG, ICD) Final board assembly/modifications/testing at SUNY-SB (> 20/week).
Commission ADC Readout and Timing & Control
Run I ADC’s working fine and being readout as part of data taking 12 Timing and Control cards being used
need T&C controller (1-2 week layout, 2-4 week production) PIB control working and being readout into data
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DØ Collab Meeting April 27, 20014
Leslie GroerColumbia University DØ Calorimeter Status
4
Calorimeter Electronics StatusT
&C
AD
C
AD
C
T&
C
Co
mm
issi
on
Trig
ger
PS
Boa
rds
Boa
rds
Boa
rds
PS
Boa
rds
Trig
ger
P S P S
0 11
1 10
2 9
3 8
4 7
5 6
Key: complete partially complete incomplete
BL
S
BL
S
Co
mm
issi
on
PS
PS
Pre
amp
Pre
amp
ENDCAPSOUTH
CENTRALCALORIMETER
ENDCAPNORTH
N
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DØ Collab Meeting April 27, 20015
Leslie GroerColumbia University DØ Calorimeter Status
5
Intercryostat Detector (ICD) Installation
ICD Tiles and Electronics Readout through Calorimeter BLS
system with slightly different preamps
1.5 tiles installed and instrumented on ECS-SW for 36 x 36
PMT box, HV + LV power, electronics pulser installed
Calibration, fiber characterization and PMT matching for signal optimization ongoing in cosmic ray test-stand
Final install in May shutdown on ECS. ECN might depend on FPS cabling issues
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DØ Collab Meeting April 27, 20016
Leslie GroerColumbia University DØ Calorimeter Status
6
Calorimeter Commissioning Shifts
Calorimeter Commissioning prior March 1 startup. Got most of CC done (<0.5% bad channels) Shifts ongoing 2-3/day. Thanks to all who
contributed U. Bassler, F. Beaudette, G. Bernardi, M. Bhattacharjee,
V. Bhatnagar, L. Duflot, T. Eltzroth, S. Fu, M. Gao, R. Hauser, M. Hohlfeld, B. Kehoe, N. Parua, M. Ridel, D. Schamberger, M. Tuts, V. Zutshi
Will finish up ECS and most of ECN in May shutdown
DD
DØ Collab Meeting April 27, 20017
Leslie GroerColumbia University DØ Calorimeter Status
7
Calorimeter LAr, HV
LAr and HV All cryostats
filled with LAr – no leaks!!!
All HV has been turned on to 2kV on all channels – stable over the last few weeks
LAr purity tested (< 0.4 ppm O2 equiv.)
LAr temp. and purity being monitored
DD
DØ Collab Meeting April 27, 20018
Leslie GroerColumbia University DØ Calorimeter Status
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Calorimeter Downloads & Controls
Downloads/controls Final download system
(COMICS) not in place yet but tested with prototype
Pedestal/limits files will be read from pickle file in Comics and downloaded to ADC
Working on pulser and T&C communication
Control GUIs (via EPICS) for LV and HV work
General alarm monitoring of all systems via SES needs to be fully implemented
General “health” GUI for shifters needed
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DØ Collab Meeting April 27, 20019
Leslie GroerColumbia University DØ Calorimeter Status
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Calorimeter Calibration Calibration
Pedestal calibration data sent to and processed in L3 scriptrunner node
Data sent to CalibManager and then to Online Oracle dB. Need to extend for gain calibrations and to send to offline.
Python tools extract data to pickle files
Working on handling dual gain pedestals and gain runs with pulser
Need automatic setup, validation and extraction tools
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DØ Collab Meeting April 27, 200110
Leslie GroerColumbia University DØ Calorimeter Status
10
L1/L2 Calorimeter Trigger
L1/L2 Cal trigger uses EM and FH layers (no CH) Trigger Hardware – BLS boards
Layer weights determined for CC and EC Trigger drivers/summers 94% installed for CC (|| < 1.2)
Remaining summers being repaired Triggers drivers here for EC (1.8 < || < 3.8). Summers here in ~ 1 wk New for Run II – trigger on MG and ICD at L2.
Recovers jet response and resolution in ICR region Sampling weights have been determined and in the process of ordering parts to make
the high eta summers and drivers. Trigger summers – first pass. Final tuning done with beam
Trigger Hardware – MCH1 L1 CTFE boards – use Run I electronic resistor network for CC –0.8 < < 0.8 Run II variable gain mezzanine cards out for production soon For start of run expect 16 trigger terms available
CEM(1or 2,rsi), CJT(1 or 2,rsi) 4 reference sets: EM: 2, 5, 7, 10, Total: 2, 3, 5, 7 GeV. Uncertainty in energy scale about 30%
Full readout to L2 + L3 needs some coding and equipment ~ 1 month Can readout via monitoring path for 36x36
Final timing of trigger to the signal and beam crossing needs to be done
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DØ Collab Meeting April 27, 200111
Leslie GroerColumbia University DØ Calorimeter Status
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Hot off the Press!!!Data taken around 00:00 today!
Date Created: Friday, April 27, 2001 12:18:00 AM CDT
Date Saved: Friday, April 27, 2001 12:38:28 AM CDT Category - Topic - sequence number: CAPTAIN_Shift/Log - General_Log - 3016 Operator(s): Horst Wahl Keyword(s): :CAPTAIN:
0:15 experts around: Dean Schamberger, Mike Tuts, Dan Edmunds, Michael Begel
**** first calorimeter trigger run taken *** run # 119575, CAL only, trigger: 1 em tower > 7 GeV 36x0 store in the Tevatron
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DØ Collab Meeting April 27, 200112
Leslie GroerColumbia University DØ Calorimeter Status
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Pulser Timing Studies
time
pulseheight
0 +6+3-3sampling time with respect to trigger
increasing pulser delay
Variation of pulse delay to study signal shape and to determine timing for maximal response for different preamp type and calorimeter capacitance
Variation of pulse height to determine linearity and gain calibration factors
Automatic ramp mechanism will allow for detailed studies of timing and linearity
Offline unpacking and analysis software needed
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DØ Collab Meeting April 27, 200113
Leslie GroerColumbia University DØ Calorimeter Status
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Pulser Delay Curves
EM2EM1
EM3a EM3b
EM3c EM3d
EM4 FH1
CH
FH3FH2
CH
EM – 4 parameter fit HAD – 6 parameter fit
Extract timing parameters and gain calibration coefficients
Correction factors due to difference between pulser and physics signal
DD
DØ Collab Meeting April 27, 200114
Leslie GroerColumbia University DØ Calorimeter Status
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Calorimeter Status and PlansApr-May 2001
Status Almost all infrastructure in place All crates reading out. Few need some internal timing for readout. T&C controller still ~6 weeks >10/12 quadrants instrumented.
200 BLS boards to go, 100 for high eta, > 20/week CC mostly debugged (0.5% level), work on ECS + ECN in May Trigger summers/drivers
CC essentially done (94%) EC summers should be here for May shutdown – test and install Ordering parts for high eta (MG, ICD)
Run Plan for 36 x 36 Think we are timed in relative to TFW using pulser and trigger pickoffs to within
one bunch crossing (132 ns) Use triple digitized readout to get this exact Compare L1 trigger energy and precision readout (gains are off a bit as Run 1
hardware at first) Take steady data for online/offline calibrations, -intercalibration, timing +
response studies, energy-scale determination etc., etc.