The "sources" of plasma physics

Chen, F.F.

doi:10.1109/27.376559

Cited by 6 publications

(8 citation statements)

References 42 publications

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“…These structures are indicated schematically in figure 2. Later work by Chen addressed the issues of proper impedance matching of the OAUGDP™ to its power supply [30], and PSPICE simulation of the OAUGDP™ as a circuit element [31].…”

Section: The Charge Trapping Mechanismmentioning

confidence: 99%

The physics and phenomenology of One Atmosphere Uniform Glow Discharge Plasma (OAUGDP™) reactors for surface treatment applications

Roth¹,

Ráheľ²,

Dai³

et al. 2005

J. Phys. D: Appl. Phys.

249

113

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In this paper, we present data on the physics and phenomenology of plasma reactors based on the One Atmosphere Uniform Glow Discharge Plasma (OAUGDP™) that are useful in optimizing the conditions for plasma formation, uniformity and surface treatment applications. It is shown that the real (as opposed to reactive) power delivered to a reactor is divided between dielectric heating of the insulating material and power delivered to the plasma available for ionization and active species production. A relationship is given for the dielectric heating power input as a function of the frequency and voltage at which the OAUGDP™ discharge is operated.

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Section: The Charge Trapping Mechanismmentioning

confidence: 99%

The physics and phenomenology of One Atmosphere Uniform Glow Discharge Plasma (OAUGDP™) reactors for surface treatment applications

Roth¹,

Ráheľ²,

Dai³

et al. 2005

J. Phys. D: Appl. Phys.

249

113

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“…The completed VV has seven ports: three vertical ports to match the X pipe, three horizontal ports to match the Y pipe and a single port pipe that can fit in either X or Y positions. The TF coil system uses legacy 'L-2' coils (Bonanos 1964), which were constructed for Francis Chen's linear experiments (Chen 1995). They are 33-turn water-cooled copper coils wound in two layers, 16 turns in each layer with 1 turn crossing over.…”

Section: Pm Assemblymentioning

confidence: 99%

“…The TF coil system uses legacy ‘L-2’ coils (Bonanos 1964), which were constructed for Francis Chen's linear experiments (Chen 1995). They are 33-turn water-cooled copper coils wound in two layers, 16 turns in each layer with 1 turn crossing over.…”

Section: Constructionmentioning

confidence: 99%

Design and construction of the MUSE permanent magnet stellarator

Qian,

Chu,

Pagano

et al. 2023

J. Plasma Phys.

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This paper documents the design and construction of MUSE, the world's first permanent magnet (PM) stellarator and the first quasi-axisymmetric experiment. The purpose of MUSE is to develop and assess a new way of building optimised stellarators that uses simple planar coils PMs. Our PM optimisation algorithm consists of initialising a geometry to pack dipoles densely, running the FAMUS code to minimise surface field error subject to PM constraints and applying discrete jumps to reach a physically realisable solution. FAMUS treats the PM system as a set of ideal point dipoles. From there we construct finite-volume magnet towers to be housed in 3D-printed PM holders. We describe the design of the PM holders, which were validated by laser metrology. We analyse the effects of finite permeability, sensitivity to perturbations and magnetostatic forces. An exact analytic formula for the magnetic field from a finite-volume PM tower is presented to compute PM–PM forces and stress on the PM holder. Stellarator construction is complete and experiments are underway.

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“…However, practical implementation of this condition is often difficult. Much of this difficulty stems from the fact that modern plasma-chemical reactors, operating at low pressures (see, for example, [5,6]), have dimensions on the order of tens of centimeters. At the same time, to reduce electric induction and distortion, the diagnostic probe is required to enter from the side opposite the location of the plasma excitation source.…”

Section: Introductionmentioning

confidence: 99%

Probe Measurements in Electronegative Plasmas: Modeling the Perturbative Effects of the Probe‐Holder

Kudryavtsev

Demidov

DeJoseph

et al. 2009

Contrib. Plasma Phys.

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A basic property of an electronegative plasma is its separation into two distinct regions: an ion-ion region far from boundaries, where the densities of positive and negative ions are higher then electron density, and a near-boundary electron-ion region, where negative ions have practically negligible density. This is due to the influence of the ambipolar electric field, which depends on electron (not negative ion) plasma parameters. This electric field "holds off" negative ions from the boundary, as the ions have lower mobility and temperature compared to the electrons. Therefore, negative ions will be repelled by any object inserted into the plasma. This can lead to errors in measurements of negative ion and electron parameters by any invasive method. Numerical modeling of electric probes in an argon-oxygen plasma clearly demonstrates possible errors of direct measurements of negative ion probe current. This can also affect results from the photo-detachment method and direct measurements of negative ion energy distribution.

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The "sources" of plasma physics

Cited by 6 publications

References 42 publications

The physics and phenomenology of One Atmosphere Uniform Glow Discharge Plasma (OAUGDP™) reactors for surface treatment applications

The physics and phenomenology of One Atmosphere Uniform Glow Discharge Plasma (OAUGDP™) reactors for surface treatment applications

Design and construction of the MUSE permanent magnet stellarator

Probe Measurements in Electronegative Plasmas: Modeling the Perturbative Effects of the Probe‐Holder

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