A ring magnetron ionizer for polarized negative ion sources

Alessi, J.; Sluyters, T.; Hershcovitch, A.

doi:10.1063/1.34613

Cited by 4 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A dramatic increase of the DA cross section with an increasing value of v, the vibrational level of the H 2 ground-state, along with a lower threshold energy, was noticed. H 2 plasma discharges have been studied extensively in the last decades to develop negative ion sources for the neutral beam injection (NBI) system [4] on the next generation magnetic fusion device, International Thermonuclear Experimental Reactor (ITER).…”

Section: Introductionmentioning

confidence: 99%

Global model for an rf hydrogen inductive plasma discharge in the deuterium negative ion source experiment including negative ions

Zorat

Vender

2000

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

A study of the gas-phase kinetics and the plasma chemistry for an rf inductively coupled H 2 plasma discharge, in the deuterium negative ion source experiment (DENISE), has been carried out by means of a global model of the discharge implemented by the numerical code, Global Model Solver (GMS), which gives results for the spatially averaged densities of the species included in the model and the electron temperature in the steady state. The modelling of the discharge includes H − , with the production mechanism assumed to be dissociative attachment of H 2 (v). The effect of the magnetic filter in the source is taken into account for obtaining an estimate of the H − density also in the extraction chamber. The differences in the cross-section data assumed for some processes, between this paper and previous work, are pointed out, along with the consequences on H − density. The ratio between the H − density and the electron density obtained with GMS for the considered negative ion production mechanism is always far lower than 0.1, even with the most optimistic assumptions for H − production that can be put forward.

show abstract

Section: Introductionmentioning

confidence: 99%

Global model for an rf hydrogen inductive plasma discharge in the deuterium negative ion source experiment including negative ions

Zorat

Vender

2000

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Hydrogen radicals are of principal importance in various schemes for deposition of diamond and diamond-like films, for selective etching of the materials and in the deposition and passivation of amorphous and polycrystalline silicon films [1,2]. Furthermore, the kinetics of hydrogen molecules, atoms and ions are of great interest in understanding the processes of H − formation [3]. In fusion experiments the kinetics of hydrogen species determine the heat losses in the plasma.…”

Section: Introductionmentioning

confidence: 99%

Non-equilibrium properties of a flowing hydrogen cascaded arc plasma: kinetic modelling

Silakov¹,

Matveyev²,

Chebotarev³

et al. 1996

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

A new kinetic scheme of the non-equilibrium gas discharge plasma is employed to describe the characteristics of a low-pressure cascaded arc plasma in pure hydrogen. The presented kinetic model includes the dynamics of the following plasma components: vibrationally excited hydrogen molecules in the ground electronic state , hydrogen atoms in the ground and electronically excited states (H(n), n=1,2,...) and electrons, positive and negative hydrogen ions . It has been shown that the low-pressure hydrogen cascaded arc plasma is characterized by high degrees of ionization and dissociation, and can generate high-density fluxes of vibrationally excited hydrogen molecules and negative ions.

show abstract