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AGATA Detector Meeting March 16th, 2006, Cologne. Detector Acceptance Tests: delivered: three symmetric detectors S001 properties excellent S002 properties excellent - PowerPoint PPT Presentation
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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
Cologne test cryostat
Modified HeKoPreamplifiers: 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)
0,00
0,50
1,00
1,50
2,00
2,50
Reihe1
Reihe2
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
FWHM at 1.3MeV
FWHM at 60keV
Mean(1.3MeV)=1.99keV
Mean(60keV)=1.14keV
Core specification
Guaranteed at 1.3MeV: 2.35keV at 122keV: 1.35keV
Core FWHM: at 1.3MeV : 2.10keVat 122keV : 1.20keV
IKP Cologne 001
0,00
0,50
1,00
1,50
2,00
2,50
Reihe1
Reihe2
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
FWHM at 1.3MeV
FWHM at 60keV
Mean(1.3MeV)=1.98keV
Mean(60keV)=1.07keV
Core specification
Guaranteed at 1.3MeV: 2.35keV at 122keV: 1.35keV
Core FWHM: at 1.3MeV : 2.08keVat 122keV : 1.19keV
GSI 002
0,00
0,50
1,00
1,50
2,00
2,50
Reihe1
Reihe2
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
FWHM at 1.3MeV
FWHM at 60keV
Mean(1.3MeV)=2.01keV
Mean(60keV)=1.03keV
Core specification
Guaranteed at 1.3MeV: 2.35keV at 122keV: 1.35keV
Core FWHM: at 1.3MeV : 2.13keVat 122keV : 1.10keV
INFN Padova 003
Detector 1
Detector 2
Detector 3
Crosstalk < 10for all three detectors
-3
Resolution of B001-73888
0
0,5
1
1,5
2
2,5
3
3,5
4
FW
HM
[k
eV
]
Reihe1
Reihe2FWHM at 1.3 MeV
FWHM at 60 keV
Resolution of A001-73892
0
0,5
1
1,5
2
2,5
3
FW
HM
[k
eV
]
Reihe2
Reihe1FWHM at 60keV
FWHM at 1.3 MeV
Resolution of A001-73892
Sample spectrum of segment A1 (2.7keV)
Sample spectrum of segment A3 (2.33keV)
Sample spectrum of segment A5 (3.66keV)
Detector B001
Examples of spectra at Vdet = 5000V:
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
Detector A001
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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