Transcript Document 7186810

CMS HCAL project
HCAL = Hadron Calorimeter
(HB- Barrel, HE- Endcap, HO-Barrel-Outer, HF-Forward)
University of Rochester
DoE Site Visit,
Monday July 17, 2006
1:20-1:40 pm
Arie Bodek,
Pawel de Barbaro
University of Rochester
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(+update as of CMS Week at CERN June 23, 2006)
CMS HCAL (AB) Test Beam Table/ LPC/ (PFS,RD) CMS Tracker (RD)
• 3 Faculty: Prof. A. Bodek (AB), Prof. P. Slattery (PFS) Prof. R. Demina (RD)
• 4 Research Faculty: Dr. P. de Barbaro (AB) (at CERN)
•
Dr. H. Budd (AB)(at Fermilab) Dr. G. Ginther (PFS), Dr. M. Zelinski (PFS)
• 2 Research Associate: Dr. Y.S. Chung (AB)(at Fermilab), Dr. Yu. Gotra (RD)
• 3 Grad. Students: B. Auerbach (RD), Ms. S. Lockwitz (PT) , D. Miner (RD)
• 4 Technical Associates: Ms. J. Gielata, Ms. A. Sanocka, Ms. H. Zeng (at
Fermilab) built HCAL, RBX boxes, Electronic ->(all AB recently moved
from HCAL (AB) to Tracker (RD) ), D. Sidirof (RD)
• 8 Undergraduates: Mr. J. Dolen, Mr. C. Justus, Mr. A. Gennis, Mr. A.
Grannis, Mr. D. Prendergast, Mr. G. Voronov, Mr. J. Widawsky, Mr. J.
Haas (REU from SFSU) - (all RD) mostly at Rochester
• 1 Engineers: Mr. S. Korjenevski (RD) (at Rochester)
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Rochester Calorimeter Group
•1970-80 Invented/developed scintillator calorimeters with wavelength
shifting readout for large area neutrino detectors - CCFR/NuTeV collab.
(3mx3m)
•1980-90 Invented/developed scintillator tile-fiber wavelength shifting
calorimeters for SSC-SDC (prototypes) in collaboration with FNAL.
• 1990’s Invented/Industrialized/built the first large scintillator multi-tile
(mega-tile) tile-fiber calorimeter for CDF End-Plug (I.5mx1.5m)
• Next: Expanded the multi-tile/mega-tile concept to larger scale (CMS-HB
barrel - 6m long) and led the construction, testing, test beam, test beam
analysis, installation and calibration of CMS HCAL calorimeter
•Most recently: in charge of all Installation, integration and calibration at all
of HCAL (HB, HE, HO, HF) at CERN, and magnet test (MTCC)
•(HB- Barrel, HE- Endcap, HO-Barrel-Outer, HF-Forward)
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Rochester Calorimeter Group
3 decades of developing new calorimeter technologies, running and
analysis of prototype detectors in test beams, publications,
industrialization, construction, commissioning , operations and using the
new capabilities of the detectors for new physics.
e.g. built Neutrino CCFR/NuTeV, Collider SSC/SDC, e+e- AMY, Electron
SLAC End Station A, Collider CDF Plug Upgrade, collider CMS HCAL,
Neutrino- MINERvA
Led by: Prof. Arie Bodek,
Senior Scientists: Pawel de Barbaro
Senior Scientist: Howard Budd,
Senior Scientist : Willis Sakumoto
Note that tile-fiber technology has now become a standard, and is used
by CDF, Dzero, CMS, ATLAS, MINERvA and others. The main issues now
are industrialization, optimization, larger scales- then installation,
calibration, operations and maintenance, and using the new capabilities
of the detectors for new physics.e.g. muon ID, electron ID, jets etc., 4
CMS-HCAL Overview 2005-2006
(only Rochester contributions are discussed
in this presentation)
Rochester has been in charge of Installation
and Commissioning of HCAL Hardware:
• LV Low Voltage
• HV High Voltage
• DCS Detector Control System,
(pedestals, front end controls, ADC gains)
• RBX readout boxes
• FE front end QIE digitizers
Tested at Fermilab (Chung) installed at CERN (de Barbaro)
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Rochester has been in charge of Calibration in 20052006:
• Initial gain calibration using radioactive wire-sources note radioactive source calibration techniques developed first in CCFR/NuTeV
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timing studies using LED and Lasers,
pedestal and gain stability studies
HTRs (HCAL Trigger and Readout)
muons in HCAL using cosmic ray triggers.
Current activity:
• MTCC (Magnet Test/Cosmic Challenge)
- Test of CMS Magnet, mapping
of B field, and full integration of all CMS subsystems.
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HCAL status a year ago (2005)
Only shells in 2005 . In 2006 now all installed !!!!
2005: Only Shells Installed for HE- and HE+ RBX’s, connected to the
cooling system
Cooling circuit for HE+ and HE- completed, including ME manifold
pressure tested at 1bar, not yet tested at 15 bars
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HCAL Status, June 2006
• HB
fully calibrated (w.s., LED, Laser),
HB+ and HB- inserted into magnet
eight of 18 HB+ wedges ready for mtcc
• HE Fully calibrated (w.s., LED, Laser),
HE- moved again YB0
four of 18 HE+ wedges ready for mtcc
• HO On five Yoke Barrels ( YB) wheels
RBXs tested, ready to be installed
YB+2 installed/commissioned
YB+1 installation started
four YB+2 30 degree muon sectors ready for mtcc
sector 10 from YB+1 and YB0 will be also in mtcc
• HF HF wire-sourced, ready to be lowered into Underground
Collision Hall (UX5) by early July06
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HB+ inserted in solenoid: April 06
Yellow Cradles used to insert
HB (Hadron Barrel) into
magnet
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HCAL tasks to be completed after magnet test
HB: Scintillator L0, L16 still to be installed after
Barrel ECAL
Air drivers for wire-source calibration
HO installation and tests on YB+1,0,-1-2
HF: to be moved to SX5 July 06, first piece of
CMS to be lowered (Aug. 06)
Cables from UX5 (Underground eXperiment collision Hall- ) to
USC (Underground Service Cavern):
Cabling to start in early July 06
Cabling of YB0 (central wheel) to take place after
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lowering/early 2007
Commissioning results
• (a) Precision of wire source calibration
(2%)
• (b) Precision of Laser timing
( ~ 1 nanosec which is about 5% of the 25
nsec bunch crossing (BX)
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Raw source signal (chn)
(a) Precision of wire source tower-tower calibration (2%)
two different source strengths- 8000 tile measurements
Black: 1.5mCi data,
0.1 chn
Green, Red: 5mCi data, 0.4 chn
Hbminus, raw signal
0.4chn
0.1chn
Black: 1.5mCi data, 0.1 chn
72 Phi slices
HBminus
Phi sector12
(b)Laser timing (~1 nsec) vs eta tower,
HBminus Megatile path
TB2004 muon data test beam
0.4 ts
0.4 ts
et
a differ by ~ 10 nsec. Laser and
Tower TOF +light path
et
a
test beam agree->use download time delay corrections
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Setup for summer 2005 Cosmic Ray Measurement using HB Wedges
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Average time (top) = 9.5 t.s
Timing difference
between Top and Bottom
Wedges
is 0.5 t.s ~ 12 ns.
For cosmic rays
t.s. = time slice = bx
(bunch crossing) = 25 ns.
Average time (bot) =10.0 t.s
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Commissioning of HCAL:
cosmic ray muons in HE using ME1/1 triggers
YE+1 will remain open at least
until early july 2006
We have cabled up a single, 20deg in phi
HE+ sector
HE muons runs using HCAL local DAQ
and CSC trigger
A year later we did the
same test with cosmic
rays for HE, except
that we used the Emu
Chambers to generate
the trigger - May 2006
Trigger on ME1/1, chamber 27 (10deg)
Read out HE+,
sector 14 (20deg)
Trigger rate ~5Hz,
100k events in less than 5 hrs
EMU chambers providing
the trigger
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pre-mtcc ME1/1 HE setup
IP
Muon
Chambers
LAYERS
17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 0 -1
=3.000
29
28
27
26
25
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=2.360
HE
O
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W
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E
21
R
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ME1/1
T
ME1/1(26)
S
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17
16
=1.603
ME1/1(27)
Only 10% of triggers cross HE
=1.305
ME1/1(28
) trigger; cathode strips only
CSC
require 4 out of 6 layers
HE+14 17
HE Muon Pulse shape, corrected for trigger jitter
(max energy time-slice forced to bx=10) June 2006
RUN 344
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Magnet Test Cosmic Challenge
HCAL Challenge of MTCC
•Services,
•Cabling infrastructure
•Time synchronization
•Trigger test (muon system,
ECAL +DAQ)
•Event display and e-log
•DQM -data quality monitors
• Air drivers, for radioactive
sources in B field
•Magnetic field effects on
Wire source Calibration
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four 20deg
sectors on HE+
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16
15
14
Will be read
out during
the magnet
test (mtcc)
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Will be read
out during
the magnet
test (mtcc)
HB+, sectors 5-8
HB+, sectors 14-17
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YB+2, eight 30deg sectors, 4 RBXes,
YB+1, sectors 10&11, 1 RBX
Will be read
YB0, sectors 10, 1 RBX
out during
the magnet
test (mtcc)
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Magnet Test Cosmic Challenge
Readiness of HCAL for mtcc
• Subsections of HB (Hadron Barrel),, HE (Hadron
Endcap), HO (Hadron Outer), installed and
commissioned for mtcc (Magnet Test Cosmic Challenge)
• From point of view of HCAL i&c, getting ready
for mtcc (Magnet Test Cosmic Challenge) has already been
a great success
• Huge learning curve: cabling, LV, HV, other
services (water, N2), dcs, …
• Especially useful experience with L0 (layer 0)
installation, EB/TK (Ecal, Barrel and Tracker) cable
trays
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summary
• Last twelve months were very successful for HCAL
• We have calibrated HB (Hadon Barrel), HE (Hadron Endcap),
and HF (Hadron Forward) : (with LED, Laser, radioactive
sources)
• HB , HE and HF are almost ready for lowering into
UX5 (Underground eXperiment collision Hall)
• HO (Hadron Outer) i&c is progressing well, schedule
driven by MB (Muon Barrel) installation
• HCAL ready for mtcc (Magnet Test Cosmic Challenge)
• MTCC begin to integrate Rochester effort on HCAL, Tracker, LPC -> Physics
• Preparing for UX5 (Underground eXperiment collision Hall)
cabling and installation in USC (Under Service Cavern for
underground cabling)
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Looking from IP point towards -Z side at the end cap surface, YB -1 (Yoke Barrel disk -1)
Roch HCAL: The immediate
task for 2006 is the completion
of the Magnet Test/Cosmic
Challenge (MTCC). HCAL is
currently scheduled to be
lowered into the cavern in Fall
2006. Dr. de Barbaro has been
in charge of these activities.
After the installation of the CMS
detector in the underground
cavern, Rochester group will
assume leadership in the
Operation of the HCAL
subsystem, run coordination,
data quality monitoring.
deBarbaro-MTCC Operations coordinator
Roch Tracker/LPC: Dr.
Gotra is moving to CERN in
July 2006 to work on rod
installation in the TOB
support structure, integrating
the TOB with the rest of the
CMS tracker, and TOB
commissioning and testing.
Three graduate student
Auerbach, Lockwitz and
Miner are already working on
this project during the
summer 2006. The work on
commissioning will continue
till the summer of 2007
Gotra- MTCC tracker+DAQ expert
LHC startup: Current date for closing the ring : 30 August 07:
Engineering test run with 400 on 400 GeV beams in Fall 2007.
April 2008 - First 14 TeV CM collisions - Good time to take a leave at
CERN (A. Bodek) - Integrate HCAL, Tracker, LPC --> Physics 25
Additional slides
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YE+1
27
HB+
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YB0
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YB-1
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YB-2
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YE-
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CMS schedule v35.0
magnet test complete:
Oct 06
central wheel (YB0)
lowering:
Dec 06
tracker installation:
Apr 07
“ready to close“
31 Aug 07
Several areas need
detailed study.
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CMS Event display for cosmic rays in HB July 2005
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Calibration: Average energy deposition in HCAL
versus Phi for cosmic rays: as compared to wire
source calibration, versus LED calibrations at
different times - shown as (Burn In, HBP, QC,
HPD gain measurements))
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Muon energy spectrum in HE
signal above 5 fC (1 GeV) required for front and back towers
Front and back coincidence
4 hrs of running,
10 deg CSC trigger
20 deg HE sector
50fC
= 10 GeV Rates agree with
predictions from
vitali smirnov
Energy (fC)
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Signal difference (source moving in vs moving out)
for individual tiles
1.5mCi,
6.4 k entries
RMS=0.005chn
+/-0.02 chn
5mCi
11.3k entries
RMS=0.006chn
RMS of difference
~ 0.005 channels
This is an absolute signal
uncertainty,
not a relative error
=================
Single tile signal
relative error:
6% for 1.5mCi data
2% for 5mCi data 37
Statistical error of calibration constants for HCAL towers
using weighted sum of individual tiles
(Tower_in- Tower_out)/Tower
+/- 5%
1.5mCi data,
Relative error on Delta
for towers = 2.0%
5mCi data,
Relative error on Delta
for towers = 0.6%
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Tower calibration constants depend on pion shower
profiles used to weight individual layers
1.5mCi
RMS=1.8%
+/- 5%
5mCi
RMS=1.5%
relative difference of tower
calibration constants,
using 50 Gev pion weights
(all pions vs pions-mip-in-ecal).
RMS for 1.5mCi data is 1.8%
RMS for 5.0mCi data is 1.5%
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