DESPEC-Ge:Summary of the WG parallel

session

A.Gadea on behalf of A.Jungclaus

Topics presented:• Possible configuration of DESPEC-Ge

planar detectors with AGATA crystals. To be used to probe the Imaging array concept.

• Progress on the Cryostat development at the Sofia University.

• Test of the behavior of Ge detectors in the vicinity of the FRS beam-line and implantation target.

• Preamplifier tests.

THE Ge IMAGING TELESCOPE CONCEPT

Maria Doncel, Begoña Quintana

LRI University of Salamanca Andres Gadea

IFIC, CSIC-Uni. Valencia

Imaging with wall configurations

Algorithm developed for AGATA not optimized yet for

DESPEC+AGATA. Developed for background reduction

Position resolution for PSA:

AGATA: 5mm

DESPEC Ge Planar : 2 mm

3 sources separated 6cm placed in the central

AIDA DSSSD :137Cs: (0,0,0)60Co: (-60,0,0)152Eu: (60,0,0)

137Cs60Co

152Eu

DESPEC Ge cryostatD.Balabanski et al.

72 x 72 x 20

15

T < − 180 °C

3 W electric cooler

FET: < − 20 °C

two stage Peltier

Preamps: 150 mW

Cryostat concept

Ge Detector functionality test in highbackground conditions

P.Boutachkov, M. Górska et al,

PREAMPLIFIERS CHARACTERIZATION FOR

DESPEC (FAIR)

Álvaro Hernández Prieto (LRI – Usal. Salamanca)Ivan Kojouharov (GSI. Darmstadt)

DESPEC Meeting - Darmstadt, Germany. October 2009

Tested Units (Features)• PSC 821-CMS

– Dissipated Power = 1360 mW• HEKO

– Dissipated Power = 420 mW• Ylocator

– Dissipated Power = 216 mW

Conclusions

• Good results for PSC 821-CMS but higher Power consumption.

• Not good results for HEKO

• Good results for Ylocator Preamp at Low input C � Development.

• The best Option: WARM FET