E. GaruttiCALICE collaboration meeting, Prague 20071 CERN Test beam (part II) Erika Garutti,...
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Transcript of E. GaruttiCALICE collaboration meeting, Prague 20071 CERN Test beam (part II) Erika Garutti,...
![Page 1: E. GaruttiCALICE collaboration meeting, Prague 20071 CERN Test beam (part II) Erika Garutti, Fabrizio Salvatore.](https://reader035.fdocuments.us/reader035/viewer/2022062519/5697bfaf1a28abf838c9cecf/html5/thumbnails/1.jpg)
E. Garutti CALICE collaboration meeting, Prague 2007 1
CERN Test beam (part II)
Erika Garutti, Fabrizio Salvatore
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E. Garutti CALICE collaboration meeting, Prague 2007 2
Beam instrumentation description
500 m
beam
3x310x10 trigger
* all in mm
News on the beamline1) beam info from CERN database available from run 330411 2) Cherenkov operated for e/and/p separation3) 3 x/y pairs of MWPC with double readout4) amplitude r/o of 1cm thick scint. counter (20x20 inner_veto) + outer_veto with 20x20 cm hole to tag double particle5) 10x10 cm trigger only (no 3x3)6) hodoscope installed for initial muon runs and from ECAL chip irradiation to end
hodoscope
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E. Garutti CALICE collaboration meeting, Prague 2007 3
the veto counter
10 GeV e- run
for analysis use analog readout incrate / slot / fe / chip / chan : 172 / 12 / 4 / 0 / 17
possible cut veto < 7000 ADC ch
20x20 cm2 veto counteramplitude readout
available only from run330924 on
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E. Garutti CALICE collaboration meeting, Prague 2007 4
the outer veto
rate : 10x10 trigger 1500 ppsOR of outer counter AND 10x10 50 pps
in binary files:bit 5 & 6 = 10x10 trig coincidencebit (1 or 2 or 3 or 4)&(5&6) = veto
in LCIO files:ifVetoXY(), X=D, U (Down, Up)
Y=L, R (Left, Right)
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E. Garutti CALICE collaboration meeting, Prague 2007 5
Clean-up examples
events cut by no-outer-veto OR
events cut by inner-veto Ampl<7000 ADC ch.
maybe interesting eventselected (?!) withouter-veto
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E. Garutti CALICE collaboration meeting, Prague 2007 6
the Cherenkov counter
Cherenkov bit available from run 330250 on as bit 13 in binary filesisCherenkovTrigger() == 1 (0) for electrons (pions) in LCIO files
normally used for e tagging at E < 30 GeV
from run 331269 to 331463 the Cherenkov gas was changed from He to N2 achieved p/pi separation!!! for these runs isCherenkovTrigger() == 1 (0) for pions (protons) in LCIO files
beam
H6B11 m long gas vessel
PMT
H6A
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E. Garutti CALICE collaboration meeting, Prague 2007 7
He
beam E [GeV]
Pre
ssur
e [b
ar]
beam E [GeV]
Pre
ssur
e [b
ar]
10 20 30 10 50 100
min. pressure
N2
Pion/Proton separation
pion threshold proton threshold
ECAL HCAL
Cherenkov ON = pionsCherenkov OFF = protons
1 mip-like particle
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E. Garutti CALICE collaboration meeting, Prague 2007 8
MWPC alignment
MWPC TDC# TDCchannel#
1-left 0 0 1-right 0 1 1-down 0 2 1-up 0 3 2-left 0 4 2-right 0 5 2-down 1 0 2-up 1 1 3-left 1 2 3-right 1 3 3-down 1 4 3-up 1 5 * all units in mm
alignment performed by CERN survey group
cable mapping
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E. Garutti CALICE collaboration meeting, Prague 2007 9
MWPC performance
this year much better collimated beamalso at low energy
6-10 GeV still broad distribution
beam impact point tuned by shift crew differences ~ 1cm from run to run
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E. Garutti CALICE collaboration meeting, Prague 2007 10
the hodoscope
correlation hodoscope_X / MWPC_X and hodoscope_Y / MWPC_Y
provide 1 additional x-y point between last MWPC and ECAL
from 14th August readout from the DAQ
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E. Garutti CALICE collaboration meeting, Prague 2007 11
Detector performance
Total data taking time 7 weeksSPS uptime 80.7 %Beam controlled by H6B 76.1 % (94.4 % of uptime)DAQ on beamData 60.2% (79.1 % of beam in H6B)DAQ on calibration 7.8 %
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E. Garutti CALICE collaboration meeting, Prague 2007 12
ECAL
plots made on shift with online analysis tool (thanks Allister)NO corrections applied
e- e+
chiptest
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E. Garutti CALICE collaboration meeting, Prague 2007 13
ECAL noise
pedestal fluctuation during one run (slot 19, run 330774)
80GeV hadrons at ECAL (0,+3)The hadron passes the ECAL (almost) undetected and generates showers in the HCAL A gap effect?
known effects of noisy layers and pedestal fluctuations also this year
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E. Garutti CALICE collaboration meeting, Prague 2007 14
ECAL chip irradiation
5 position scan for each of the 4 chips on the special ECAL slab-90 GeV electron beam used~1.2 M events per chip
from Roman analysis
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E. Garutti CALICE collaboration meeting, Prague 2007 15
AHCAL
plots made on shift with online analysis toolNO corrections applied
- +
10o 20o
runs < 330231 marked as odd HCAL longitudinal profile
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E. Garutti CALICE collaboration meeting, Prague 2007 16
runs < 330231
high energy pointswill determine the constant term
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E. Garutti CALICE collaboration meeting, Prague 2007 17
muon calibration
20 deg10 deg0 deg
muon in HCAL
noise stable @~ 5 mip
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E. Garutti CALICE collaboration meeting, Prague 2007 18
current and temperature
jump of 300 uA ?!
slow increase of 10 uA
large temperature variations:~ 0.5 K day-night> 4 K over 3 weeks to be accounted in SiPM calibration
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E. Garutti CALICE collaboration meeting, Prague 2007 19
HCAL current map
at 10 V bias all currents should be = 0 uA
possible cause: single SiPM (out of 108 connected)with short circuited
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E. Garutti CALICE collaboration meeting, Prague 2007 20
TCMT
180 GeV pionstrong HCAL-TCMTcorrelation
TCTM always operational
LED system was off afterstage rotation
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E. Garutti CALICE collaboration meeting, Prague 2007 21
DAQ performance
90 Hz limit of DAQin spill
120 Hz limit of DAQout of spill
limited by beam rate