Silicon pad detectors for tracking and particle identification in heavy ion collisions

by H. Pernegger (Massachusetts Institute of Technology)

Friday 31 Mar 2000, 11:00 → 14:00 Europe/Zurich

CERN

The PHOBOS experiment at RHIC is designed to search for quark-gluon plasma in Au-Au collisions at RHIC. We will use silicon pad detectors for the reconstruction of low momentum tracks in a 14-layer silicon spectrometer and, additionally, for a multiplicity measurement over a large rapidity range. Silicon pad detectors provide true, unambiguous two-dimensional position information for the track reconstruction, which allows us to cope with the high track density close to the interaction region. Additionally we will use the analogue signal from each pad for dE/dx particle identification in the silicon spectrometer. We designed and tested several different pad geometry of varying granularity and resolution for different regions of the detector. We will compare the signal response and overall performance for different layouts. Special emphasis will be given to a precision measurement of energy loss in silicon for pions and kaons in a momentum range of 130 MeV/c to 8 GeV/c. This measurement allowed us to test the particle identification capabilities of silicon pad detectors and compare it to our Geant simulation.

Organiser(s): Rui Ribeiro /EP Division

Note: Please note the new day of the week for the EP Seminars.

more information more information