DPG 2001 Frank Hartmann (IEKP) adiated-oxygenated rradiated-oxygenated rradiated-non-oxygenated adiated-non-oxygenated sensors put in a PSI testbeam in very short time „Cross-Alps“ CMS collaboration Bari, Karlsruhe, Padova, Perugia and Wien Silizium- Mikrostreifen- Detektoren nach 10 Jahren LHC für CMS Goal: • Test complete CMS like Quality assurance • Ensure sensor functionality after 10 LHC years
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Silizium- Mikrostreifen-Detektoren nach 10 Jahren LHC für CMS
Silizium- Mikrostreifen-Detektoren nach 10 Jahren LHC für CMS. A „ Cross-Alps “ CMS collaboration of Bari, Karlsruhe, Padova, Perugia and Wien. Goal: Test complete CMS like Quality assurance Ensure sensor functionality after 10 LHC years. P -irradiated-oxygenated - PowerPoint PPT Presentation
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DPG 2001Frank Hartmann (IEKP)
P-irradiated-oxygenated Non-irradiated-oxygenatedNon-irradiated-non-oxygenatedP-irradiated-non-oxygenated sensors put in a PSI testbeam
in very short time
A „Cross-Alps“ CMS collaboration of Bari, Karlsruhe, Padova, Perugia and Wien
Silizium-Mikrostreifen-Detektoren
nach 10 Jahren LHC für CMS
Goal:• Test complete CMS like Quality assurance
• Ensure sensor functionality after 10 LHC years
DPG 2001Frank Hartmann (IEKP)
Blue double layers
Red single layers
Low resistivity to postponetype inversion lower Vdep after 10 LHC years
New all-silicon design:10 barrel layers2 inner barrel disk9 forward disks
CMS Tracker Design & Layout (1)
DPG 2001Frank Hartmann (IEKP)
CMS Tracker Design & Layout (2)
Use <100> instead of standard <111> silicon less dangling bonds less surface damage ~no increase of interstrip capacitance after irradiation no increase in noise
For small width over pitch ratio (0.25) implement metal overhang on strip to avoid breakdown (field reaches through SiO2) more stable detector with respect to bias voltage up to 500V
DPG 2001Frank Hartmann (IEKP)
P-Irradiation at Karlsruhe
B eam d iam e te r:
2 - 1 2 m m u s in g a W o p p le r
Ir rad ia te d a re a b y p o s itio n in g :
u p to 4 0 0 * 1 0 0 m m 2
• This time: 34MeV protons. (10 LHC years)
• Sensors cooled down to –10°C during irrad. (CMS like operation)
• Future CMS QA
Karlsruhe KompaktzyklotronP ro to n en e rg ie s :1 7 - 3 5 M e V o r
1 - 1 7 M e V(u s in g a d e g ra d e r- ta rg e t)
P ro to n cu rren t: 1 0 n A - 1 0 0 m A
P ro to n flu x :
1 0 in 7 0 0 s a t 1 0 0 n A1 4 pc m 2
DPG 2001Frank Hartmann (IEKP)
165V
350V
At 21°C
Tests in the lab (1)IV CV
DPG 2001Frank Hartmann (IEKP)
101pF~Same as before
1.7M~Same as before
3.2pF (one neighbour)~Same as before
1 - 2.5nA before at 21°C
Tests in the lab (2)
~450nA
DPG 2001Frank Hartmann (IEKP)
One double-sensor module
1 module with:
2 oxygenated sensors
APV25S1
prototype hybrid
prototype repeater
In the cool-box-frame
DPG 2001Frank Hartmann (IEKP)
Assembly at the PSI
Beam
Bias voltage supply
Cool-box
Electronics
DPG 2001Frank Hartmann (IEKP)
Detector Sensor Pitch Readout Status
BAI1 2xCSEM 4'', HR(7kcm), Nonirrad 61m APV25SI Broken at -27C
KA 2xMicron 4", LR(2kcm), OXYG, Irrad (10^14p(34MeV)/cm2)
61m APV25SI partially working, low signal
PD27 2xMicron 4", LR(2kcm), OXYG, Irrad(10^14p). 61m APV25SI works
BA2 2xCSEM 4", HR(7kcm), Irrad.(10^14p) 61m APV25S1 works