1. 27.06.2005 M.Shirchenko, JINR KIAE detectors test & restoration 1. Restoration of the detectors 2. Characterization of KIAE detectors 3. Next steps and modernization suggestions

2. 27.06.2005 M.Shirchenko, JINR Electronic scheme Ortec 672 EM 7245 Ortec 672 Ortec 672 Ortec 672 Master Ortec 919 HV Power Supplies: Ortec 659 6 μs

3. 27.06.2005 M.Shirchenko, JINR Final characteristics HV,VTPI,VFWHM, (1332.5 60 Co line) Noise,mVRange,MeV 137003.82.886-88.027 240001.82.5~68.025 340003.23.06-88.013 435001.542.76~88.057 525001.213.05~68.005 Detector 1 Detector 2 Detector 3 Detector 4 Detector 5 Full mass, kG 0.982.9062.4462.42.781 Bias voltage, V 40004000400025002500 Resolution, H-M 2.222.432.712.142.55 Resolution1.981.911.972.06

4. 27.06.2005 M.Shirchenko, JINR Cumulative spectra 0 -500 keV 2500 -3000 keV 1000 -1500 keV β - β region

5. 27.06.2005 M.Shirchenko, JINR Background suppression 10.006320.0075 30.0081 40.0074 50.0124

6. 27.06.2005 M.Shirchenko, JINR 137 Cs contamination Detector 1 Detector 5

7. 27.06.2005 M.Shirchenko, JINR Conclusion All 5 detectors are in operation All 5 detectors are in operation No doubling of the peak on D2 No doubling of the peak on D2 There is some kind of puzzle with background suppression on the D5 There is some kind of puzzle with background suppression on the D5 Future steps: Recycling the detector 1 (possibly D3 ) Recycling the detector 1 (possibly D3 ) Long run measurement with 20 cm Pb shield for checking absence of the contamination more efficiently Long run measurement with 20 cm Pb shield for checking absence of the contamination more efficiently New DAQ system based in VME logic New DAQ system based in VME logic Additional electronics is needed Additional electronics is needed Comparison of the measured data with MaGe simulation Comparison of the measured data with MaGe simulation