The effects of pre-ionization using a shunt resistor on reproducibility of the x-ray emission in a dense plasma focus device
| Autor: | D. Piriaei, H. R. Yousefi, Mahmood Ghoranneviss, A. SalarElahi, T. D. Mahabadi |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Physics Argon Dense plasma focus Astrophysics::High Energy Astrophysical Phenomena chemistry.chemical_element Plasma Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Two-stream instability chemistry Physics::Plasma Physics Electromagnetic coil Ionization 0103 physical sciences Pinch Plasma channel Atomic physics |
| Zdroj: | Physics of Plasmas. 24:082502 |
| ISSN: | 1089-7674 1070-664X |
| DOI: | 10.1063/1.4994072 |
| Popis: | In this research, the effects of pre-ionization using a shunt resistor on reproducibility of x-ray emission in a Mather type plasma focus device have been studied. This technique increased the intensities of the emitted x-rays from argon as the filling gas of the device and made the x-ray yields with similar intensities reproducible. A Mirnov coil was also used to record the variations of the plasma's magnetic field, and the wavelet spectrums of these recorded signals showed the reduced instabilities due to the application of the pre-ionization technique. Moreover, it was demonstrated that this technique was capable of reducing the number of initial runaway electrons that could increase the impurities and instabilities inside the plasma. In addition to the above-mentioned features, this technique could improve the uniform formation of the current sheath during the breakdown phase that might later lead to a high quality pinch and high intensity emitted x-rays. |
| Databáze: | OpenAIRE |
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