Modelling and Electrical Characteristics of the Thailand Plasma Focus-II (TPF-II)

Arlee TAMMAN; Mudtorlep NISOA; Boonchoat PAOSAWATYANYONG; Dheerawan BOONYAWAN; Nopporn POOLYARAT; Thawatchai ONJUN

doi:10.48048/wjst.2018.3797

Authors

Arlee TAMMAN School of Science, Walailak University, Nakhon Si Thammarat 80161 http://orcid.org/0000-0001-8503-3597
Mudtorlep NISOA School of Science, Walailak University, Nakhon Si Thammarat 80161
Boonchoat PAOSAWATYANYONG Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok 10330
Dheerawan BOONYAWAN Plasma and Beam Physics Research, Facility, Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200
Nopporn POOLYARAT Faculty of Science and Technology, Thammasat University, Pathum Thani 12120
Thawatchai ONJUN School of Manufacturing Systems and Mechanical, Engineering, Sirindhorn International Institute of Technology, Thammasat University, Pathum Thani 12120

DOI:

https://doi.org/10.48048/wjst.2018.3797

Keywords:

Plasma focus, pinch phase, plasma sheath, short-circuit test, Lee model code

Abstract

The Thailand Plasma Focus II (TPF-II) is a 3.3 kJ dense plasma focus that was developed at Walailak University, Thailand. The aim of the device is to study the production of ion beams in the keV energy range and their applications for the color modification of gemstones. A high-energy ion beam is produced by heating and acceleration in the pinch phase of the plasma focus. The heating process is determined by the maximum electrical current, which can be optimized by variation of the system’s inductance. Lee model code was implemented to optimize the configuration of the electrodes. The current waveforms for the different initial conditions were used to obtain the system’s inductance, which was verified by a short circuit test. It was found that the inductance and resistance were about 153 nH and 12 mΩ, respectively.

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