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Tracker Week April 2002 IEKP 1
Irradiation of one CMS ceramic Irradiation of one CMS ceramic hybrid from Dorazil in Karlsruhehybrid from Dorazil in Karlsruhe
Frank Hartmann
IEKP - Universität Karlsruhe (TH)
Tracker Week April 2002 IEKP 2
InstallationInstallation• Initial positioning by
laser pointer
• Scanning with 1mm
row steps (10cm/s)
• Proton current: 2 A
• 26 MeV protons
• Irrad. of 120x120mm2
up to 1e14 p/cm2 takes 20min
Tracker Week April 2002 IEKP 3
Stability of Beam CurrentStability of Beam Current
0 30 60 90 120 150 180 210 240 270 300 330 360 3900,25
0,30
0,35
0,40
0,45
0,50
0,55
0,60
C
urr
en
t [A
]
Time [s]
Tracker Week April 2002 IEKP 4
Scan Area
Area of Interest
Autoradiography picture
Area cut for dosimetry
Homogeneity of ScanningHomogeneity of Scanning
Tracker Week April 2002 IEKP 5
Irradiation of HybridIrradiation of Hybrid
• During irradiation: Clock, Trigger (10Hz), Error Buffer Readout (1Hz), Reset
• Irradiation with 2A protons up to 2.7e14 p/cm² (~30years LHC) at RT
• First qualification at cyclotron with over 5m cables and provisional readout
• Hybrid is still activated (2µSv)• Result: Hybrid still alive
Tracker Week April 2002 IEKP 6
Picture of Hybrid on Ni foilPicture of Hybrid on Ni foil
Area cut for dosimetry
Hybrid
Tracker Week April 2002 IEKP 7
Pedestal (peak) Pedestal (peak) beforebefore & & afterafter
After
Before
Tracker Week April 2002 IEKP 8
Noise (deconv) Noise (deconv) beforebefore & & afterafter
After
Before