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AGATA Detector Meeting March 16th, 2006, Cologne

AGATA Detector Meeting March 16th, 2006, Cologne. Detector Acceptance Tests: delivered: three symmetric detectors S001 properties excellent S002 properties excellent

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AGATA Detector Meeting March 16th, 2006, Cologne

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  1. AGATA Detector Meeting March 16th, 2006, Cologne Detector Acceptance Tests: delivered: three symmetric detectors S001 properties excellent S002 properties excellent S003 properties excellent three asymmetric detectors A001 does not meet specification B001 does not meet specification C001 test ongoing, one segment missing

  2. Cologne test cryostat Modified HeKo Preamplifiers: BNC output connectors Acceptance test includes: energy resolution at 60 keV, 1.3 MeV with analogue electronics, energy resolution and crosstalk with digital electronics (XIA DGF4C, Rev. E)

  3. Mean(1.3MeV)=1.99keV FWHM at 1.3MeV FWHM at 60keV Mean(60keV)=1.14keV Core FWHM: at 1.3MeV : 2.10keV at 122keV : 1.20keV IKP Cologne 001 Segment specifications Guaranteed FWHM at 1.3MeV : <2.30keV, mean < 2.1keV at 60keV : <1.35keV, mean < 1.15keV Expected FWHM at 1.3MeV : mean < 2.05keV at 60keV : <1.00keV Core specification Guaranteed at 1.3MeV: 2.35keV at 122keV: 1.35keV

  4. Core FWHM: at 1.3MeV : 2.08keV at 122keV : 1.19keV GSI 002 Mean(1.3MeV)=1.98keV FWHM at 1.3MeV FWHM at 60keV Mean(60keV)=1.07keV Segment specifications Guaranteed FWHM at 1.3MeV : <2.30keV, mean < 2.1keV at 60keV : <1.35keV, mean < 1.15keV Expected FWHM at 1.3MeV : mean < 2.05keV at 60keV : <1.00keV Core specification Guaranteed at 1.3MeV: 2.35keV at 122keV: 1.35keV

  5. Core FWHM: at 1.3MeV : 2.13keV at 122keV : 1.10keV INFN Padova 003 Mean(1.3MeV)=2.01keV FWHM at 1.3MeV FWHM at 60keV Mean(60keV)=1.03keV Segment specifications Guaranteed FWHM at 1.3MeV : <2.30keV, mean < 2.1keV at 60keV : <1.35keV, mean < 1.15keV Expected FWHM at 1.3MeV : mean < 2.05keV at 60keV : <1.00keV Core specification Guaranteed at 1.3MeV: 2.35keV at 122keV: 1.35keV

  6. Detector 1 Detector 2 Detector 3 -3 Crosstalk < 10 for all three detectors

  7. FWHM at 60 keV FWHM at 1.3 MeV

  8. Resolutionof A001-73892 FWHM at 1.3 MeV FWHM at 60keV

  9. Sample spectrum of segment A1 (2.7keV) Sample spectrum of segment A5 (3.66keV) Sample spectrum of segment A3 (2.33keV) Detector B001

  10. Examples of spectra at Vdet = 5000V: Detector A001 Core: FWHM = 2.17 kev at 1.3 MeV Segment C2: FWHM = 1.92 keV at 1.3 MeV Segment D5: FWHM = 2.60 keV at 1.3 MeV Segment D6: FWHM = 2.63 keV at 1.3 MeV

  11. The three symmetric detectors are being mounted in test cryostats for scanning: cryostat 1: delivered to Liverpool cryostat 2: almost ready for delivery to Orsay cryostat 3: detector to be mounted Two of the asymmetric detectors were returned to Canberra for repair. Acknowledgement: symmetric detectors tested by D. Weißhaar analogue tests of asymmetric detectors by H. Hess, A. Wiens crosstalk measurement of test cryostats by N. Warr

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