Development of Hydrogen Pair-Ion Source on the Basis of Catalytic Ionization

Oohara, W.; Maeda, Tsuyoshi; Higuchi, Tetsuya

doi:10.1063/1.3637414

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…The irradiation energy is proportional to V pc , because the plasma potential fluctuation is very small compared with V pc . 26 The hydrogen pressure in the source during operation is about 0.1 Pa.…”

Section: Methodsmentioning

confidence: 99%

“…To overcome this difficulty, we have proposed a plasma-assisted catalytic ionization method for the production of positive and negative hydrogen ions. [23][24][25][26] When positive hydrogen ions produced by discharge are irradiated to a porous catalyst, the hydrogen ions are produced from the back of the irradiation plane. In this paper, the properties of the produced ions are discussed in detail.…”

Section: Introductionmentioning

confidence: 99%

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Separation of ion components produced by plasma-assisted catalytic ionization

Oohara

Hibino

Higuchi

et al. 2012

Review of Scientific Instruments

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Formation of negative hydrogen ion: Polarization electron capture and nonthermal shielding J. Chem. Phys. 137, 094310 (2012) Ionization energy of atoms obtained from GW self-energy or from random phase approximation total energies J. Chem. Phys. 136, 194107 (2012) Scattering of nitrogen molecules by silver atoms J. Chem. Phys. 136, 164305 (2012) Rotational excitation of H2O by para-H2 from an adiabatically reduced dimensional potential J. Chem. Phys. 136, 094109 (2012) Additional information on Rev. Sci. Instrum. Positive and negative hydrogen ions are produced by plasma-assisted catalytic ionization using a porous nickel plate, where the irradiation current density and energy of positive ions produced by discharge to the porous plate are controlled. The ion energy distributions are analyzed from the properties of current densities of positive and negative ions extracted from the porous surface. Positive ions passing through fine pores of the porous plate and positive and negative ions produced on the porous surface are observed. It is clarified that the produced fluxes of positive and negative ions and the flux balance between them are controlled by the irradiation current density and energy, respectively.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Separation of ion components produced by plasma-assisted catalytic ionization

Oohara

Hibino

Higuchi

et al. 2012

Review of Scientific Instruments

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“…To mimic the electron positron plasma in a controlled environment, Japanese scientists Hatekayama and Oohara successfully created lighter pair ion (p-i) [consisting of positive and negative ions] (hydrogen ion) plasmaand high density Fullerene ion (C 60 + and C 60 -) plasma [6,[8][9][10][11]. Unlike the electron-positron (e-p) plasma systems, in pair ion (p-i) plasma, problem of annihilation due to its long enough lifetime does not arise, and therefore collective behavior can be studied conveniently under controlled conditions.…”

Section: Introductionmentioning

confidence: 99%

Linear and nonlinear analysis of Ion-Temperature-Gradient (ITG) driven mode in the asymmetric pair-ion magnetoplasma

Razzaq¹,

Ehsan²,

Mirza³

et al. 2022

Phys. Scr.

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We have investigated linear and nonlinear dynamics of ion-temperature-gradient driven drift mode for Maxwellian and non Maxwellian pair-ion plasma embedded in an inhomogeneous magnetic field having gradients in ion's temperature and number density. Linear dispersion relations are derived and analyzed analytically as well as numerically for different cases. It has been found that growth rate of instability increases with increasing η.By using the transport equations of Braginskii, model, a set of nonlinear equations are derived. In the nonlinear regime, soliton structures are found to exist. Our numerical analysis shows that amplitude of solitary waves increases by increasing ion to electron number density ratio. These solitary structures are also found to be sensitive to non thermal kappa and Cairns distributed electrons. Our present work may contribute a good illustration of the observation of nonlinear solitary waves driven by the ITG mode in magnetically confined pair-ion plasmas and space pair-ion plasmas as the formation of localized structures along drift modes is one of the striking reasons for L-H transition in the region of improved confinements in magnetically confined devices like tokamaks.

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“…To overcome this difficulty, we have proposed a plasmaassisted catalytic ionization method for the production of positive and negative hydrogen ions. [9][10][11][12][13] The hydrogen ions are produced from the back of the irradiation plane, when positive ions produced by discharge are irradiated onto a Ni porous catalyst. Some of the irradiated positive ions pass through the fine pores of the porous catalyst.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen ions produced by plasma-assisted catalytic ionization using nickel grid

2013

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Positive and negative hydrogen ions are produced by plasma-assisted catalytic ionization using a nickel grid, where the irradiation current density of positive ions onto the grid can be controlled by the discharge power. The irradiation energy can be controlled by both the grid potential and the discharge plasma potential. Extraction properties and energy distributions of positive and negative ions produced in the cases of using the grid and a porous nickel plate are compared. Two production mechanisms of negative ions are found in the process of plasma-assisted catalytic ionization. V C 2013 AIP Publishing LLC. [http://dx.

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Development of Hydrogen Pair-Ion Source on the Basis of Catalytic Ionization

Cited by 6 publications

References 10 publications

Separation of ion components produced by plasma-assisted catalytic ionization

Separation of ion components produced by plasma-assisted catalytic ionization

Linear and nonlinear analysis of Ion-Temperature-Gradient (ITG) driven mode in the asymmetric pair-ion magnetoplasma

Hydrogen ions produced by plasma-assisted catalytic ionization using nickel grid

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