Determination of Plasma Electron Temperature in a Pulsed Inductively Coupled Plasma (PICP) device

Chaisombat, S.; Ngamrungroj, D.; Tangjitsomboon, P.; Mongkolnavin, Rattachat

doi:10.1016/j.proeng.2012.02.034

Cited by 3 publications

(7 citation statements)

References 3 publications

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“…The computed primary current waveform and peak value agree with those published in the Chulalongkorn paper. 1 The poor coupling constant of f ¼ 0.2 derived in those experiments is responsible for the low plasma current I p with a peak value of barely 20 kA.…”

Section: Applying the Radiative Theta Pinch Codementioning

confidence: 86%

“…This assumption is consistent with the fitting of computed and measured current waveforms. 1 We write the circuit equation as…”

Section: The Equations Of the Modelmentioning

confidence: 99%

“…(1). Equations (1) and (9) are the generating equations for this pinch phase 3. These are solved step-by-step for I c and r p .…”

Section: Phase 3: Slow Compression or Pinch Phasementioning

confidence: 99%

“…Based on the above phases and equations the code is written for the 3 phases radially inwards shock, radially outward reflected shock, and slow compression (pinch). This code (phase 1 only) had been used by Chaisombata et al 1 to describe the Chulalongkorn Pulsed Inductively Coupled Plasma (PICP) which is a theta pinch of the type described by this model. They measured a current (I c ) waveform from their device.…”

Section: Applying the Radiative Theta Pinch Codementioning

confidence: 99%

“…A theta pinch may use a single conducting wide-loop of capacitor-pulsed current wrapped around a cylindrical glass tube containing a gas at low pressure. 1,2 The pulsed magnetic field associated with this primary current I c generates a potential which breaks down the gas in the tube and drives a current in the tube. The induced current loop heats the gas producing plasma.…”

Section: Introductionmentioning

confidence: 99%

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A model code for the radiative theta pinch

et al. 2014

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A model for the theta pinch is presented with three modelled phases of radial inward shock phase, reflected shock phase, and a final pinch phase. The governing equations for the phases are derived incorporating thermodynamics and radiation and radiation-coupled dynamics in the pinch phase. A code is written incorporating correction for the effects of transit delay of small disturbing speeds and the effects of plasma self-absorption on the radiation. Two model parameters are incorporated into the model, the coupling coefficient f between the primary loop current and the induced plasma current and the mass swept up factor f m. These values are taken from experiments carried out in the Chulalongkorn theta pinch. V

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Section: Applying the Radiative Theta Pinch Codementioning

confidence: 86%

“…This assumption is consistent with the fitting of computed and measured current waveforms. 1 We write the circuit equation as…”

Section: The Equations Of the Modelmentioning

confidence: 99%

“…(1). Equations (1) and (9) are the generating equations for this pinch phase 3. These are solved step-by-step for I c and r p .…”

Section: Phase 3: Slow Compression or Pinch Phasementioning

confidence: 99%

Section: Applying the Radiative Theta Pinch Codementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A model code for the radiative theta pinch

et al. 2014

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Estimation of the Current Sheath Dynamics and Magnetic Field for Theta Pinch by Snow Plow Model Simulation

2019

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Observation of plasma dynamics in a theta pinch by a novel method

Wang,

Cheng,

Wang

et al. 2023

Matter and Radiation at Extremes

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A novel experimental method is proposed for observing plasma dynamics subjected to magnetic fields based on a newly developed cylindrical theta-pinch device. By measuring simultaneously the temporal profiles of multiple parameters including the drive current, luminosity, plasma density, and plasma temperature, it provides a basis for observing the plasma dynamics of the theta pinch, such as shock transport and magnetohydrodynamic instability. We show that the plasma evolution can be distinguished as three phases. First, in the radial implosion phase, the trajectories of the current sheath and shock wave are ascertained by combining experimental data with a snowplow model (Lee model) in a self-consistent way. Second, in the axial flow phase, we demonstrate that m = 0 (sausage) instability associated with the plasma axial flow suppresses the plasma end-loss. Third, in the newly observed anomalous heating phase, the lower-hybrid-drift instability may develop near the current sheath, which induces anomalous resistivity and enhanced plasma heating. The present experimental data and novel method offer better understanding of plasma dynamics in the presence of magnetic fields, thereby providing important support for relevant research in magneto-inertial fusion.

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Determination of Plasma Electron Temperature in a Pulsed Inductively Coupled Plasma (PICP) device

Cited by 3 publications

References 3 publications

A model code for the radiative theta pinch

A model code for the radiative theta pinch

Estimation of the Current Sheath Dynamics and Magnetic Field for Theta Pinch by Snow Plow Model Simulation

Observation of plasma dynamics in a theta pinch by a novel method

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