Title :
Pulse mode readout techniques for use with non-gridded industrial ionization chambers
Author :
Popov, Vladimir ; Degtiarenko, Pavel
Author_Institution :
Radiat. Control Dept., Thomas Jefferson Nat. Accel. Facility, Newport, VA, USA
Abstract :
Highly sensitive readout technique for precision long-term radiation measurements has been developed and tested in the Radiation Control Department at Jefferson Lab. The new electronics design is used to retrieve ionization data in a pulse mode. The dedicated data acquisition system works with M=Audio Audiophile 192 High-Definition 24-bit/192 kHz audio cards, taking data in continuous waveform recording mode. The on-line data processing algorithms extract signals of the ionization events from the data flow and measure the ionization value for each event. Two different ion chambers are evaluated. The first is a Reuter-Stokes Argon-filled (at 25 atm) High Pressure Ionization Chamber (HPIC), commonly used as a detector part in many GE Reuter-Stokes instruments of the RSS series. The second is a VacuTec Model 70181, 5 atm Xenon-filled ionization chamber. Results for both chambers indicate that the techniques allow using industrial ICs for high sensitivity and precision long-term radiation measurements, while at the same time providing information about spectral characteristics of the radiation fields.
Keywords :
data acquisition; ionisation chambers; readout electronics; High Pressure Ionization Chamber; Reuter-Stokes Argon-filled HPIC; VacuTec Model 70181; Xenon-filled ionization chamber; continuous waveform recording mode; data acquisition system; electronics design; frequency 192 kHz; ionization data retrieval; ionization events; long term radiation measurement; nongridded industrial ionization chambers; online data processing algorithm; pulse mode readout; Production;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE
Conference_Location :
Valencia
Print_ISBN :
978-1-4673-0118-3
DOI :
10.1109/NSSMIC.2011.6154512