Transcript Silicon beam telescope (SiBT) and MCz

Silicon beam telescope (SiBT) and MCz
detectors: status and plans for 2008
Erkki Anttila, Sandor Czellar, Jaakko Härkönen, Matti Kortelainen, Tapio Lampén, Panja Luukka,
Maria Maksimow, Henri Moilanen, Teppo Mäenpää, Eija Tuominen, Jorma Tuominiemi, Esa Tuovinen,
Heikki Viljanen (Helsinki Institute of Physics)
.
Leonard Spiegel (FNAL)
.
Tobias Barvich, Alexander Dierlamm, Martin Frey, Alexander Furgeri, Frank Hartmann, Maike Neuland,
Hans-Jürgen Simonis, Pia Steck (Universität Karlsruhe)
.
Bernard De Callatay, Thomas Keutgen, Vincent Lemaitre, Otilia Militaru,
(Université Catholique de Louvain)
.
Alexander Kaminskiy, Dario Bisello (Università di Padova)
.
Burt Betchart, Regina Demina, Yuri Gotra,
Doug Orbaker, Sergey Korjenevski (University of Rochester)
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Panja Luukka
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Telescope setup
 The telescope reference planes + detectors under
test are housed inside so-called Vienna box.
 The temperature can be set down to -20°C
 Reference planes are installed to ±45 degrees
(due to the height limitation)
 Reference detectors D0 Run IIb HPK sensors with:
60 micron pitch
intermediate strips
size 4 cm x 9 cm
639 channels
 Readout electronics: CMS 6-APV chip Tracker Outer Barrel hybrids (5 chips
bonded)
 DAQ software: a modified version of CMS Tracker XDAQ rc1205
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Panja Luukka
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External cold finger
H
T
Q1
Peltier1
Q2
Peltier2
Q3
Peltier3
Q4
H & T Monitoring
P1
P2
P3
Temp.
Control
Power
Supplies
Multi
I/O
Board
PC
Cold plate
In addition to the large cold box (Vienna
box), in summer 2008 the setup will also
contain an external cold finger, which can
be cooled down to -50 °C.
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Improvements compared to the 2007 setup
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Temperature sensors on the backside of the detectors under test
More efficient cooling system:
 Use of chiller for removing heat from the cooling box Peltier
elements
 The top and bottom Peltier units of the cooling box will be
replaced
 The bottom unit failed during the second beam test last
summer, and changing both units will improve the reliability
of the system
Slow control in linux
 temperature, humidity, voltage, current etc. values will be logged
automatically during different runs (pedestal, physics)
New scintillators that match the telecope active area better than
the scintillators used in 2007.
Feedback from offline analysis already during the beam test
Panja Luukka
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MCz + Fz detectors for summer 2008
 Detector processing was done at the clean room of
Helsinki University of Technology (TKK) Micro and
Nanofabrication Centre (MINFAB)
 Materials: n-type Magnetic Czochralski (Okmetic)
and Float Zone (Topsil; RD50 common order) silicon
wafers
 Pitch 50 µm
 768 strips per detector (=6*128)
 Suitable for CMS 6-APV hybrid
 In addition, ministrips and diodes from the
same wafers.
 Measured detector characteristics:
 MCz Vfd ~350 V
 Fz Vfdl < 10 V
 Pitch adapters also processed in MINFAB
 glass material with Cr-Al metallization
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2008 detector irradiations
Irradiation plan for large MCz and Fz sensors
Material
Fluence
5.00E+14
20/80
MCz
8.00E+14
12/88
MCz
1.00E+15
10/90
MCz
2.00E+15
0/100
MCz
3.00E+15
0/100
MCz
3.00E+15
0/100
Fz
1.00E+14
100/0
Fz
1.00E+14
0/100
Fz
5.00E+14
20/80
Fz
5.00E+14
0/100
non-irradiated
MCz
non-irradiated
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Protons at
Karlsruhe
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Neutrons at
Louvain-la-Neuve
n/p mix %
MCz
MCz
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Panja Luukka
The neutron
irradiation plan
completed
The proton
irradiation plan for
first four MCz
fluences completed
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Status
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26.5.2008
Neutron irradiations for large sensors completed
Proton irradiations will be completed in the close
future
After the detectors have cooled down from the
irradiation, they will be characterized and built into
modules.
All modules should be ready by the end of June.
The beam test is scheduled for 10-23.7 at CERN H2
beam area
Beam test installations at H2 can start 7.7. during
the long SPS machine development period (3 days)
Panja Luukka
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