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

Tracker Week April 2002 IEKP 9

Noise (peak) Noise (peak) beforebefore & & afterafter

After

Before

Tracker Week April 2002 IEKP 10

Calib (deconv) Calib (deconv) beforebefore & & afterafterAfter

Before

Calibration: only first shot!Still working!To be further investigated in the lab!