1 / 1

Individual Ge detector (bottom and side view)

The Gamma Detector. A  -ray detector with high photopeak efficiency, granularity and large solid angle is the M INIBALL . Six clusters with seven 6-fold segmented Ge-detectors (in total 252 segments) constitute a cube that surrounds 65% of the target solid angle.

eve
Download Presentation

Individual Ge detector (bottom and side view)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Gamma Detector A -ray detector with high photopeak efficiency, granularity and large solid angle is the MINIBALL. Six clusters with seven 6-fold segmented Ge-detectors (in total 252 segments) constitute a cube that surrounds 65% of the target solid angle. • Six clusters make up a cube array with an inner radius > 9 cm. For a nucleus velocity v/c ~0.05 the energy resolutionE equals 7 keV at E = 1.3 MeV for the most problematic observation angle of 90°. The cluster arrangement gives a high geometric modularity and flexibility. one Ge-segment HV Individual Ge detector (bottom and side view) • Each individually aluminium encapsulated Ge-detector is 6-fold segmented to ensure the necessary granularity. Pulse shape analysis improves the energy resolution and the primary -ray interaction position determination. Cube array with cryostats • A cluster consist of 7 Ge-detectors (without BGO anti-compton shielding) configured as shown below. To each cluster a cryostat is connected which cools the Ge-crystals (=> less noise). • MINIBALL data • Granularity = 252 segments in 4 = 65%ph > 20% for 1.3 MeV -raysph > 5% for 11.7 MeV -raysMultiplicity M< 15Energy resolution = 2 - 3 keVLocalization = 1 cm for 1.3 MeV -raysCounting rate < 10 kcs-1 per Ge-detector Cluster

More Related