CHICSi-a compact ultra-high vacuum compatible detector system for nuclear reaction experiments at storage rings. II. Detectors

Details CHICSi-a compact ultra-high vacuum compatible detector system for nuclear reaction experiments at storage rings. II. Detectors CHICSi-a compact ultra-high vacuum compatible detector system for nuclear reaction experiments at storage rings. II. Detectors

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003nimpa.500...96c&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 500, Issue 1-3, p. 96-115.

Physics

3

Scientific paper

We describe the detectors for identification of charged particles and fragments in CHICSi, a large solid angle multi-telescope system mounted inside an ultra-high vacuum (UHV), cluster-jet target chamber. CHICSi performs nuclear reaction experiments at storage rings. The telescopes consist of a first very thin, 10-14μm Si detector, a second 300μm (or possibly 500μm) ion implanted Si detector supplemented by a 6mm GSO(Ce) scintillator read out by a photodiode (PD) or by a third 300μm Si detector. The telescopes provide full charge separation up to /Z=17 and mass resolution up to /A=9 in the energy range 0.7-60AMeV. The thin p-i-n diode detector, etched out from a 280μm Si wafer, and the GSO/PD detector, both exclusively developed for CHICSi, provide an energy resolution /<=8%, while the standard 300μm detectors have /<=2% energy resolution. Radiation stability of the Si detectors is confirmed up to an integrated flux of 1010 alpha particles. The GSO detector has 70% light collection efficiency with the optical coupling to the PD a simple open, 0.2mm, gap. A new method, developed to perform absolute energy calibration for the GSO/PD detector is presented.

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