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Title: The study of pinch regimes based on radiation-enhanced compression and anomalous resistivity phenomena and their effects on hard x-ray emission in a Mather type dense plasma focus device (SABALAN2)

In this study, by using argon and nitrogen as the filling gases in a Mather type dense plasma focus device at different values of pressure and charging voltage, two different kinds of pinch regimes were observed for each of the gases. The physics of the pinch regimes could be explained by using the two versions of the Lee's computational model which predicted each of the scenarios and clarified their differences between the two gases according to the radiation-enhanced compression and, additionally, predicted the pinch regimes through the anomalous resistivity effect during the pinch time. This was accomplished through the fitting process (simulation) on the current signal. Moreover, the characteristic amplitude and time scales of the anomalous resistances were obtained. The correlations between the features of the plasma current dip and the emitted hard x-ray pulses were observed. The starting time, intensity, duration, and the multiple or single feature of the emitted hard x-ray strongly correlated to the same respective features of the current dip.
Authors:
; ;  [1] ;  [2] ;  [3] ;  [4] ;  [3] ;  [4] ;  [5]
  1. Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran 1477893855 (Iran, Islamic Republic of)
  2. Department of Physics and Biophysics, Tehran Medical Sciences Branch, Islamic Azad University, Tehran 1916893813 (Iran, Islamic Republic of)
  3. INTI International University, Nilai 71800 (Malaysia)
  4. (Australia)
  5. (Malaysia)
Publication Date:
OSTI Identifier:
22489968
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; ARGON; ELECTRIC CURRENTS; ELECTRIC POTENTIAL; HARD X RADIATION; NITROGEN; PLASMA FOCUS DEVICES; PLASMA SIMULATION; PULSES; SIGNALS