Difference between revisions of "June, 6, 2007 Scintillator Signals from source"
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| − | Today Oleksiy, Tamuna, and Tony looked at the scintillator response to a | + | Today Oleksiy, Tamuna, and Tony looked at the scintillator response to a Californium (<sup>252</sup>Cf :1 <math>\mu</math>g emmits 1.7E8 neutrons/min ) neutron source. Two types of PMTs were used each with different scintillators. PMTs were (i) ORTEC 266 and (ii) PHOTONIS VD 119. A voltage of 700 Volts (the base drew 500 <math>\mu</math>A) was applied to the ORTEC PMT and 1200 Volts (the base drew 800 <math>\mu</math>A)to the Photonis. |
The Cf-252 was placed first at the distance ~0 cm to the front edge of scintillators. (i) Signal amplitude was ~8 mV at the threshold set on the oscilloscope 2.4 mV. (ii) Signal amplitude was ~20 mV. | The Cf-252 was placed first at the distance ~0 cm to the front edge of scintillators. (i) Signal amplitude was ~8 mV at the threshold set on the oscilloscope 2.4 mV. (ii) Signal amplitude was ~20 mV. | ||
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Our next step is to install a scaler and attempt to measure rates. | Our next step is to install a scaler and attempt to measure rates. | ||
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Latest revision as of 17:01, 7 June 2007
Today Oleksiy, Tamuna, and Tony looked at the scintillator response to a Californium (252Cf :1 g emmits 1.7E8 neutrons/min ) neutron source. Two types of PMTs were used each with different scintillators. PMTs were (i) ORTEC 266 and (ii) PHOTONIS VD 119. A voltage of 700 Volts (the base drew 500 A) was applied to the ORTEC PMT and 1200 Volts (the base drew 800 A)to the Photonis.
The Cf-252 was placed first at the distance ~0 cm to the front edge of scintillators. (i) Signal amplitude was ~8 mV at the threshold set on the oscilloscope 2.4 mV. (ii) Signal amplitude was ~20 mV.
In the case the distance between Cf-252 and scintillators was ~3 m we had only cosmic rays events in both channels.
Material of scintillator used in case (i) was BC-420.
Our next step is to install a scaler and attempt to measure rates.