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Silicon beam telescope (SiBT) and MCz detectors: status and plans for 2008. - PowerPoint PPT Presentation
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26.5.2008 Panja Luukka 1
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)
26.5.2008 Panja Luukka 2
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 pitchintermediate stripssize 4 cm x 9 cm639 channels
Readout electronics: CMS 6-APV chip Tracker Outer Barrel hybrids (5 chips bonded)
DAQ software: a modified version of CMS Tracker XDAQ rc1205
26.5.2008 Panja Luukka 3
P1
P2
P3
Q1
Q2
Q3
Peltier1
Peltier2
Peltier3
Cold plate
H & T Monitoring
Temp.Control
PowerSupplies
HT
Q4
Multi I/OBoard
PC
External cold finger
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.
26.5.2008 Panja Luukka 4
Improvements compared to the 2007 setup
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
26.5.2008 Panja Luukka 5
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
26.5.2008 Panja Luukka 6
2008 detector irradiations
Protons at Karlsruhe
Neutrons at Louvain-la-Neuve
The neutron irradiation plan completed
The proton irradiation plan for first four MCz fluences completed
Irradiation plan for large MCz and Fz sensors
Material Fluence n/p mix %
MCz 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
MCz non-irradiated
MCz non-irradiated
Fz 1.00E+14 100/0
Fz 1.00E+14 0/100
Fz 5.00E+14 20/80
Fz 5.00E+14 0/100
26.5.2008 Panja Luukka 7
Status 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)