Characteristics of Hydrogen Negative Ion Source with FET based RF System

Journal Article · Mon Sep 26 04:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3637402· OSTI ID:21611677

Ando, A; Matsuno, T; Funaoi, T; Tanaka, N ^[1]; Tsumori, K; Takeiri, Y ^[2]

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1. Graduate School of Engineering, Tohoku University, Aoba-yama, Sendai, 980-8579 (Japan)
2. National Institute for Fusion Science, Oroshi-cho, Toki, 509-5292 (Japan)

Characteristics of radio frequency (RF) plasma production were investigated using a FET inverter power supply as a RF generator. High density hydrogen plasma was obtained using an external coil wound a cylindrical ceramic tube (driver region) with RF frequency of lower than 0.5 MHz. When an axial magnetic field around 10 mT was applied to the driver region, an electron density increased drastically and attained to over 10{sup 19} m{sup -3} in the driver region. Effect of the axial magnetic field in driver and expansion region was examined. Lower gas pressure operation below 0.5 Pa was possible with higher RF frequency. H{sup -} density in the expansion region was measured by using laser photo-detachment system. It decreased as the axial magnetic field applied, which was caused by the increase of energetic electron from the driver.

• OSTI ID: 21611677
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1390; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANIONS
BEAM INJECTION
CHARGED PARTICLES
CONFIGURATION
CYLINDRICAL CONFIGURATION
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTRON DENSITY
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EQUIPMENT
FERMIONS
FREQUENCY RANGE
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
INVERTERS
IONS
LEPTONS
MAGNETIC FIELDS
MHZ RANGE
NONMETALS
PLASMA
PLASMA BEAM INJECTION
PLASMA DENSITY
PLASMA PRODUCTION
RADIATIONS
RADIOWAVE RADIATION
RF SYSTEMS
TAIL ELECTRONS