RF-Plasma Source Commissioning in Indian Negative Ion Facility

Singh, M. J.; Bandyopadhyay, M.; Bansal, G.; Gahlaut, A.; Soni, J.; Kumar, Sunil; Pandya, K.; Parmar, K. G.; Sonara, J.; Yadava, Ratnakar; Chakraborty, A. K.; Kraus, W.; Heinemann, B.; Riedl, R.; Obermayer, S.; Martens, C.; Franzen, P.; Fantz, U.
September 2011
AIP Conference Proceedings;9/26/2011, Vol. 1390 Issue 1, p604
Conference Proceeding
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 0.5-1×1018/m3, 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.


Related Articles

  • Experimental studies of the afterglow mode with xenon in a CAPRICE ECRIS. Tinschert, K.; Iannucci, R.; Bossler, J.; Lang, R. // Review of Scientific Instruments;May2004, Vol. 75 Issue 5, p1407 

    At GSI the CAPRICE-type ECRIS delivers ion beams to the High Charge State Injector (HLI). Following the demand of high flexibility the ECRIS is operated either in cw mode for high duty cycle beams or in afterglow mode to provide low duty cycle beams for the Heavy Ion Synchrotron (SIS) at low...

  • Acceleration of 500 keV Negative Ion Beams By Tuning Vacuum Insulation Distance On JT-60 Negative Ion Source. Kojima, A.; Hanada, M.; Tanaka, Y.; Taniguchi, M.; Kashiwagi, M.; Inoue, T.; Umeda, N.; Watanabe, K.; Tobari, H.; Kobayashi, S.; Yamano, Y.; Grisham, L. R. // AIP Conference Proceedings;9/26/2011, Vol. 1390 Issue 1, p466 

    Acceleration of a 500 keV beam up to 2.8 A has been achieved on a JT-60U negative ion source with a three-stage accelerator by overcoming low voltage holding which is one of the critical issues for realization of the JT-60SA ion source. In order to improve the voltage holding, preliminary...

  • Study of Fluctuations in the CW Penning Surface-Plasma Source of Negative Ions. Belchenko, Yuri; Sanin, Andrey; Savkin, Valery // AIP Conference Proceedings;9/26/2011, Vol. 1390 Issue 1, p401 

    Study of current fluctuations for cw Penning SPS with hollow cathode drive was done. The noiseproof measurements of negative ion beam current, current in extracted electrode circuit, discharge current and voltage were carried out by the low-inductive probes in wide frequency range. Spectrum and...

  • Microsecond pulse width, intense, light-ion beam accelerator. Rej, D. J.; Bartsch, R. R.; Davis, H. A.; Faehl, R. J.; Greenly, J. B.; Waganaar, W. J. // Review of Scientific Instruments;Oct93, Vol. 64 Issue 10, p2753 

    A relatively long-pulse width (0.1-1 µs) intense ion beam accelerator has been built for materials processing applications. An applied B[sub r], magnetically insulated extraction ion diode with dielectric flashover ion source is installed directly onto the output of a 1.2 MV, 300-kJ Marx...

  • Low-energy extraction with simple two grid accelerator system. Yucai, Feng; Minghua, Pu // Review of Scientific Instruments;Jan1990, Vol. 61 Issue 1, p535 

    An experimental investigation for extending the ion extraction capabilities of a two grid accelerator system to low energy is described. The preliminary results have shown that low energy ion beams ranging from 15 to 80 eV can be extracted by biasing the screen grid potential to be negative to...

  • Space Charge Neutralization of DEMO Relevant Negative Ion Beams at Low Gas Density. Surrey, Elizabeth; Porton, Michael // AIP Conference Proceedings;9/26/2011, Vol. 1390 Issue 1, p482 

    The application of neutral beams to future power plant devices (DEMO) is dependent on achieving significantly improved electrical efficiency and the most promising route to achieving this is by implementing a photoneutralizer in place of the traditional gas neutralizer. A corollary of this...

  • Multi-antenna RF Ion Source at a High RF Power Level. Oka, Y.; Shoji, T.; Kaneko, O.; Takeiri, Y.; Tsumori, K.; Osakabe, M.; Ikeda, K.; Nagaoka, K.; Asano, E.; Sato, M.; Kondo, T.; Shibuya, M.; Komada, S. // AIP Conference Proceedings;3/12/2009, Vol. 1097 Issue 1, p282 

    A multi-antenna radio-frequency ion source with a Faraday shield is newly tested at a high RF power level in a large area negative ion source of 1/5th scale of the Large Helical Device-NNBI ion source. Inductively coupled dense hydrogen plasmas were generated uniformly over an area of 25×25...

  • Performance characteristics of a capacitively coupled 3 cm rf ion sourcea). Korzec, D.; Engemann, J.; Rapp, J. // Review of Scientific Instruments;May92, Vol. 63 Issue 5, p3068 

    A novel 13.56 MHz radio frequency capacitively coupled ion source has been developed and characterized with special emphasis on low-energy ( < 1 keV) broad ion beam extraction. When operating the source with chamber pressures ranging from 1 × 10[sup -4] to 1.7 × 10[sup -3] mbar (O[sub 2]...

  • Radio frequency driven multicusp sources (invited). Leung, Ka-Ngo // Review of Scientific Instruments;Feb1998, Vol. 69 Issue 2, p998 

    Describes the radio frequency driven multicusp sources. Impact of cesium on the negative hydrogen beam current; Application of the multicusp sources to radioactive ion beam production and compact neutron tubes; Generation of plasma through a copper coil antenna.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics