Vertex 2002 Kailua-Kona The heavy ionising particles in CMS tracker Hip effect description. The PSI beam test. Measurements of hip rate and induced dead time. Impact on Cms tracker performances. Benjamin TROCME (IPN Lyon) on behalf of CMS collaboration
The heavy ionising particles in CMS tracker. Hip effect description. The PSI beam test. Measurements of hip rate and induced dead time. Impact on Cms tracker performances. Benjamin TROCME (IPN Lyon) on behalf of CMS collaboration. CMS tracker and hip: introduction. - PowerPoint PPT Presentation
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Vertex 2002Kailua-Kona
The heavy ionising particles in CMS tracker
Hip effect description.
The PSI beam test.
Measurements of hip rate and induced dead time.
Impact on Cms tracker performances.
Benjamin TROCME (IPN Lyon) on behalf of CMS collaboration
Vertex 2002Kailua-Kona
Test beam
Lhc
The Cms all silicon tracker: ~16k modules with ~75k read out
chips(Apv). 128 strips/Apv, 4 or 6 Apvs per module.
Inelastic hadronic interactions generate hips: Up to 1000 mips signal in a 500m Si
detector. Well known effect, whose rate is predicted
by theory of energy deposition in silicon.
Impact on Apv first observed in 120GeV test beam at Cern in october 01.
CMS tracker and hip: introduction
Vertex 2002Kailua-Kona
The hips and their effects on Apvs
Inverter supply common to 128 strips:
In case of hip: sharing of the current ''consumed'' by few hit strips.
Hip topology:
High signal shared between few strips.
Downward saturated baseline in the remaining strips of the apv.