Post on 05-Feb-2016
description
QEDA2, 2013
1
QED()
2
PositroniumElectronpositron
Positroniump-Ps(singlet)(2)1.2510-10[sec]o-Ps(triplet)3(3)1.3910-7[sec]
3
22Na+(SiO2)capture
22NaNaI
NaI
PS
1200nsgate
PsNaI
PSNaIcoincidence
PS840ns delayTDC4
840 - TDC4 = decay time
4
ADC calibrationADCADCchanneleventCalibration511keV2
ADC
0 keV511 keVADC1163 ch1344 chADC2180 ch1371 chADC3155 ch1407 ch
Energy[keV]= 0.4327(ADC1 - 163)Energy[keV]= 0.4291(ADC2 - 180)Energy[keV]= 0.4881(ADC3 - 155)
CalibrationkeVevent
TDC calibrationTDC4calibrationTDC4TDCTDC
fixed delay TDC
delay [ns]TDC4[ch]11753158623979403797
Time[ns]= (TDC4 58.37) / 3.984
Calibrationevent
TQT
TQTQt0,y0E
TQ
pick-offo-Psp-Psp-Ps.etco-Pspick-off
pick-off
Fitting
pick-offfitting
fittingfittng
fitting
fitting
5
pick-off
(v)TDC
(nv)TDC
pick-off491531keV
pick-offPick-off
TQ
pick-offNaI3TQ
TQTQ
TQTQTQ
NaITQTQTQTQ
NaI1NaI2NaI3TQ[ns]9.77.48.2
TQ
pick-offpick-offo-Pspick-offf(t)TQf(t)pick-offpick-off
pick-offNaIpick-offf(t)pick-off
NaI1NaI2NaI3pick-off[ns]11.614.416.7
pick-offfitting
fittingfittingfittingROOTfittingfitting
NaI1NaI2NaI3fitting[ns]24.0827.9762.97
NaI1NaI2NaI3TQ[ns]9.77.48.2pickoff[ns]11.614.416.7fitting[ns]24.0827.9762.97
NaINaI1020
pick-offo-PsTQpick-off
fittingfitting
fittingfittingpick-offfitting
Fin
******