THE SPECIFICS OF THE TIME-OF-FLIGHT DETECTOR SIGNAL GENERATION IN MEASUREMENTS OF THE PLASMA FOCUS RADIATION IN A CLOSED SPACE
V. E. Ablesimov, O. Yu. Pasharina
VANT. Ser.: Mat. Mod. Fiz. Proc 2020. Вып.1. С. 34-42.
The analysis of experimental measurement results was performed for the DD-neutron yield experiments with the Mather-type plasma focus chamber. Calculations of the signal generation were carried out for the experiment on recording the plasma focus radiation by scintillation detectors (SD) with the time-of-flight method under specific measurement conditions in the experimental hall. The measurement conditions are a 3D geometry of the medium surrounding the radiation source and detector and a noticeable contribution of the neutron- and gamma-radiation caused by the neutron-medium interaction to the signal recorded by the detector. The measurement experiment was simulated by the C-007 code using the Monte Carlo method. It was demonstrated that the anisotropy of the neutron flux generated in the plasma focus chamber has a significant effect on the SD signal generation. The role of the contribution to the detector signal from radiation scatted in the environment was established. Keywords: plasma focus, neutron yield anisotropy, scintillation detectors, the time-of-flight method, the Monte Carlo method.
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