RF-Plasma Source Commissioning in Indian Negative Ion Facility

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

DOI:https://doi.org/10.1063/1.3637432· OSTI ID:21611707

Singh, M J; Bandyopadhyay, M; Yadava, Ratnakar; Chakraborty, A K ^[1]; Bansal, G; Gahlaut, A; Soni, J; Kumar, Sunil; Pandya, K; Parmar, K G; Sonara, J ^[2]; Kraus, W; Heinemann, B; Riedl, R; Obermayer, S; Martens, C; Franzen, P; Fantz, U ^[3]

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1. ITER- India, Institute for Plasma Research, A-29, Sector 25, GIDC, Gandhinagar, Gujrat (India)
2. Institute for Plasma Research, Bhat Gandhinagar, Gujrat (India)
3. Max-Planck-Institut fuer Plasmaphysik, Boltzmannstrasse 2, D-85748 Garching (Germany)

The Indian program of the RF based negative ion source has started off with the commissioning of ROBIN, the inductively coupled RF based negative ion source facility under establishment at Institute for Plasma research (IPR), India. The facility is being developed under a technology transfer agreement with IPP Garching. It consists of a single RF driver based beam source (BATMAN replica) coupled to a 100 kW, 1 MHz RF generator with a self excited oscillator, through a matching network, for plasma production and ion extraction and acceleration. The delivery of the RF generator and the RF plasma source without the accelerator, has enabled initiation of plasma production experiments. The recent experimental campaign has established the matching circuit parameters that result in plasma production with density in the range of 0.5-1x10{sup 18}/m{sup 3}, at operational gas pressures ranging between 0.4-1 Pa. Various configurations of the matching network have been experimented upon to obtain a stable operation of the set up for RF powers ranging between 25-85 kW and pulse lengths ranging between 4-20 s. It has been observed that the range of the parameters of the matching circuit, over which the frequency of the power supply is stable, is narrow and further experiments with increased number of turns in the coil are in the pipeline to see if the range can be widened. In this paper, the description of the experimental system and the commissioning data related to the optimisation of the various parameters of the matching network, to obtain stable plasma of required density, are presented and discussed.

• OSTI ID: 21611707
• Journal Information: AIP Conference Proceedings, Vol. 1390, Issue 1; Conference: 2. international symposium on negative ions, beams and sources, Takayama City (Japan), 16-19 Nov 2010; Other Information: DOI: 10.1063/1.3637432; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
ACCELERATORS
ANIONS
BEAM EXTRACTION
COMMISSIONING
INDIA
ION SOURCES
IPP GARCHING
MHZ RANGE
OSCILLATORS
PLASMA
PLASMA BEAM INJECTION
PLASMA DENSITY
PLASMA PRODUCTION
RF SYSTEMS
ASIA
BEAM INJECTION
CHARGED PARTICLES
DEVELOPING COUNTRIES
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY RANGE
GERMAN FR ORGANIZATIONS
IONS
NATIONAL ORGANIZATIONS