EXPERIMENTAL STUDY USING GAS FILLED DETECTOR IN NUCLEAR MEASUREMENT AND ITS APPLICATION
HANAN AWAD SAYED ALY;
Abstract
Investigations are made on the wire-plane streamer corona detector (SCD) characteristics in relation to their dependence on the anode applied voltages V, as well as on anode-wire diameter and interelectrode separation h. Relation between the two parameters and h is represented. It has been shown that <1> & h have a decisive effect on pure streamer region length (V, - Yo ) and on corona current characteristics.
To differentiate between streamer pulses and spark pulses a diode clipping circuit is used. Hence it has been possible to separate counting response of streamer pulses from that pulses of spark region i.e. both streamer and spark zones have been separated and examined.
In connection with the present studies, the free charge electric field as well as capacitance per unit length and cHarge per unit length are calculated, and the results have been applied to practical configuration.
The extrapolated number- distance range of a-particles has been measured for different a- particle sources, namely, 210Po, 226Ra, 241Am &
23"l'u, as well as for different <1> & h. The wire-plane SCD has shown a very good reliability to determine the range of a - particles.
Pulse height spectra from wire-plane SCD, due to passage of a particles from different a-sources are determined, at controlled anode voltages for different values of, h and different a-source heights h. from anode-wire. These spectra of pulse amplitudes are carefully studied and with the help of previous authors results on corona current discharge explained. Incidentally this has given the possibility of suggesting an avalanche mechanism for streamers creation in wire-plane configuration due to passage of a- particles.
To differentiate between streamer pulses and spark pulses a diode clipping circuit is used. Hence it has been possible to separate counting response of streamer pulses from that pulses of spark region i.e. both streamer and spark zones have been separated and examined.
In connection with the present studies, the free charge electric field as well as capacitance per unit length and cHarge per unit length are calculated, and the results have been applied to practical configuration.
The extrapolated number- distance range of a-particles has been measured for different a- particle sources, namely, 210Po, 226Ra, 241Am &
23"l'u, as well as for different <1> & h. The wire-plane SCD has shown a very good reliability to determine the range of a - particles.
Pulse height spectra from wire-plane SCD, due to passage of a particles from different a-sources are determined, at controlled anode voltages for different values of, h and different a-source heights h. from anode-wire. These spectra of pulse amplitudes are carefully studied and with the help of previous authors results on corona current discharge explained. Incidentally this has given the possibility of suggesting an avalanche mechanism for streamers creation in wire-plane configuration due to passage of a- particles.
Other data
| Title | EXPERIMENTAL STUDY USING GAS FILLED DETECTOR IN NUCLEAR MEASUREMENT AND ITS APPLICATION | Other Titles | دراسة تجريبية باستخدام الكاشف الغازى فى القياسات النووية وتطبيقاتخا | Authors | HANAN AWAD SAYED ALY | Issue Date | 1998 |
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