Summary: Detector module and Preamplifiers

Transcription

1 Summary: Detector module and Preamplifiers A. Wiens, IKP Cologne A. Goergen, CEA Saclay D. Quirion, Canberra G. Pascovici, IKP Cologne P. Reiter IKP University Cologne AGATA week 8-11 July 28 Uppsala

2 Detector Delivery Owner Status A1* 11/25 GANIL rejected hole trapping A1 6/26 GANIL accepted A2* 4/26 TU Munich rejected leakage currents A2 6/27 TU Munich accepted A3* 11/26 Liverpool rejected leakage currents A3 1/27 Liverpool accepted A4 9/27 Ankara rejected segments out of specification A4* 7/28 Ankara CAT at IKP, Cologne A5 12/27 Stockholm CAT at CEA, Saclay & IKP B1* 11/25 Padova rejected segments out of specification B1 6/27 Padova rejected leakage currents B2 8/26 GANIL accepted B3 6/27 Liverpool accepted B4 12/27 Ankara rejected missing segment in capsule B4* 6/28 Ankara CAT at IKP, Cologne B5 12/27 Stockholm CAT at CEA, Saclay C1 12/25 Padova accepted C2 7/26 GANIL accepted C3 3/27 Liverpool accepted, broken, leakage currents C4 9/27 Ankara accepted C5 12/27 Stockholm CAT at CEA, Saclay

3 Summary customer acceptance tests B1 6/7 Padova Rejected - damage of contacts of segments A3 & C3 A2 6/7 München Accepted C4 9/7 Ankara Accepted A4 9/7 Ankara Rejected six segments out of E specs A3 1/7 Liverpool Accepted B4 12/7 Ankara Rejected - missing segment B4 6/8 Ankara Tested - not in specification A5 12/7 Stockholm Test ongoing (Saclay & Cologne) C5 12/7 Stockholm Test at Saclay B5 12/7 Stockholm Test at Saclay A4 7/8 Ankara Test at Cologne Detector tests since last AGATA week Tests are done at CEA, Saclay and IKP, Cologne

4 Summary available detector Available detectors for AGATA triple clusters A1, A2, A3 B2, B3 C2 Detectors for period fall and winter 28/9 13 detectors may be available A1, A2, A3, A4, A5, A6 B1, B2, B3, B4, B5, B6 C1, C2, C4, C5 A6, B1, B6 delivery July 28 redelivery of turkish detectors A4, B4, C4 Future detectors January - June 29 italian detectors C6, A7 detector repair of C3 summer 28 order of german detectors A8, B7, C7

5 First AGATA triple cluster detector IKP Cologne, H.-G. Thomas CTT Montabaur

6 A1 FWHM [kev] Tripel Cluster 1 Energies: Single vs Triple cryostat 59,6 kev Single 59.6 kev Triple Specification low energy ,5 kev Single 1332,5 kev Triple Specification high energy Excellent energy resolution in new triple cluster ,5 kev Single 1332,5 kev Triple Specification high energy C2 : 965 +/ ev 59,6 kev Single 59,6 kev Triple Specification low energy 1332,5 kev Single 1332,5 kev Triple Specification high energy glued detector less microphonics kev Single 59.6 kev Triple Specification low energy Resolution 6keV line Resolution 1.33MeV line Mean values 6 kev : A1 : 111 +/- 53 ev B2 : 139 +/- 7 ev especially at low energies (electronic noise): - HEKO AGATA preamp - electronic assembly (grounding, cabling)

7 A1 in Triple Cryostat 5 V Measured Cross talk to Seg Xtalk (theory) Smallest capacities in ring 2 Xtalk amplitudes from seg "i" to seg "j" [%] -,5 -,1 -,15 -,2 A2 B2 C2 D2 E2 F2 -,25 segment "i" + 36x segment "j"

8 No cross talk between detectors in Triple Cryostat.5% A1 B2 C2 A1.% -.5% -.1% -.15% -.2% -.25% Sector A Sector F Sector A Sector F Sector A Sector F B C.5% B2.% -.5% -.1% -.15% A C -.2% -.25%.5% C2.% -.5% -.1% -.15% A B -.2% -.25%

9 AGATA Triple Clusters: Summary and outlook AGATA Triple Cluster Detectors operational: -first triple: cryostat, mechanics, vacuum o.k. seg-preamps, core preamp & pulser o.k. energy resolution o.k. no cross talk between detectors second triple: commissioning phase Outlook: -- transport to Legnaro of ATC1 - in July assembly of third triple - constrained by available detectors ATC1 ATC2 ATC3

10 AGATA - upgraded front end electronics Upgraded Charge Sensitive Preamplifier - new frequency compensation for Single & Dual Gain Reworked Dual Gain, reconfigurable: - either Single or Dual; either LV-CMOS or LVDS Programmable Spectroscopic Pulser - as a tool for self-calibrating energy, time, dead time, time alignment, detector characterization etc.) G. Pascovici for the AGATA Preamplifier- and Detector Group F. Zocca, A. Puglia, D. Bazzacco

11 Conclusions very low noise, very wide dynamic range charge-sensitive pre-amplifier spectroscopic range successfully extended by more than one order of magnitude with new TOT technique up to 18 MeV two modes of operations four sub-ranges: -5 (2) MeV and 5(2)-18 MeV very clean transfer function improvement: Dominant pole compensation Programmable Spectroscopic Pulser