Suppression of accelerated electrons in a high-current large negative ion source

Takeiri, Y.; Oka, Y.; Osakabe, M.; Tsumori, K.; Kaneko, O.; Takanashi, T.; Asano, E.; Kawamoto, T.; Akiyama, R.; Kuroda, T.
May 1997
Review of Scientific Instruments;May97, Vol. 68 Issue 5, p2003
Academic Journal
Discusses the suppression of accelerated electrons in a high-current large negative ion source. Design of the external filter type large negative ion source; Grid configuration of the accelerator; Thermal load measurement by water calorimetry; Improvement of the acceleration efficiency; Negative-ion related current loss.


Related Articles

  • The ALTO Facility for the Production of Rare Nuclei. Cottereau, E. // AIP Conference Proceedings;3/15/2009, Vol. 1099 Issue 1, p774 

    The ALTO facility (Accélérateur Linéaire et Tandem d’Orsay) at Institut de Physique Nucléaire d’Orsay is under commissioning. The main aim of this facility is to provide neutron rich isotope beams for both nuclear physics studies (away from the valley of stability) and...

  • Ion beam noise reduction method for the MEVVA ion source (abstract)a). Oks, E.; Spädtke, P.; Emig, H.; Wolf, B. H. // Review of Scientific Instruments;Apr94, Vol. 65 Issue 4, p1262 

    The beam extracted from the MEVVA ion source tends to be of a relatively high-noise level, particularly for the higher charge states, making beam transport difficult in accelerator applications. This paper presents experimental results which show that the use of grids within the ion source in...

  • First operation of the charge-breeder electron-cyclotron-resonance ion source at the Texas A&M Cyclotron Institute. May, D. P.; Tabacaru, G.; Abegglen, F. P.; Cornelius, W. D. // Review of Scientific Instruments;Feb2010, Vol. 81 Issue 2, p02A901 

    The 14.5 GHz electron-cyclotron-resonance ion source (ECRIS) designed and fabricated specifically for charge breeding has been installed at the Texas A&M University Cyclotron Institute for use in the institute's ongoing radioactive-ion-beam upgrade. The initial testing of the source has just...

  • Development of 1 MeV H- Accelerator at JAEA for ITER NB. Taniguchi, M.; de Esch, H. P. L.; Svensson, L.; Umeda, N.; Kashiwagi, M.; Watanabe, K.; Tobari, H.; Dairaku, M.; Sakamoto, K.; Inoue, T. // AIP Conference Proceedings;3/12/2009, Vol. 1097 Issue 1, p335 

    This paper reports the recent activities at JAEA for the development of 1 MeV H- ion accelerator toward the ITER NBI. For the development of MAMuG accelerator, a 320 mA H- ion beam was successfully accelerated as the highest record in the world at the MeV class energy (796 keV). This was...

  • Possible Upgrade of an Existing Tandem Accelerator Facility to an ISOL Facility for Neutron-Rich Rare Isotope Beams. Das, J. J.; Kanjilal, D.; Roy, A. // AIP Conference Proceedings;3/15/2009, Vol. 1099 Issue 1, p742 

    The feasibility and utility of a Helium multi-jet system to transport fission fragments vertically up to an ion source 50 m above ground level is explored. This idea opens up the possibility of using the existing 15-UD tandem and SC linac accelerator system at Inter University Accelerator Center...

  • Compensation of beamlet repulsion in a large negative ion source with a multi aperture accelerator. Kashiwagi, M.; Inoue, T.; Grisham, L. R.; Hanada, M.; Kamada, M.; Taniguchi, M.; Umeda, N.; Watanabe, K. // AIP Conference Proceedings;3/12/2009, Vol. 1097 Issue 1, p421 

    Excess heat loads to accelerator grids limit extension of pulse length in operation of the large negative ion sources with multi aperture accelerator. Part of the heat loads is caused by interception of deflected beamlets due to their space charge repulsion. In this paper, a beamlet steering...

  • Introduction to Circular Accelerators—Basic Science and Applied Research. Trubnikov, Grigory // AIP Conference Proceedings;1/5/2010, Vol. 1204 Issue 1, p91 

    This paper gives an introduction to history and overview of circular particle accelerators, reviews acceleration methods and basic principles of: weak and strong focusing, transverse and longitudinal particle motion, optic elements operation. The classification of circular machines is given....

  • Effect of the plasma instability on the beam intensity from RIKEN 18 GHz electron cyclotron resonance ion source. Higurashi, Y.; Nakagawa, T.; Kidera, M.; Aihara, T.; Kobayashi, K.; Kase, M.; Goto, A.; Yano, Y. // Review of Scientific Instruments;Mar2006, Vol. 77 Issue 3, p03B703 

    We measured the beam oscillation of RIKEN 18 GHz electron cyclotron resonance ion source for various conditions. In this experiment, the frequency of the beam oscillation increases with increasing the gas pressure and decreases with increasing rf power. The oscillation frequency is strongly...

  • Steering of Multiple Beamlets in the JT-60 U Negative Ion Source. Kamada, Masaki; Hanada, Masaya; Ikeda, Yoshitaka; Grisham, Larry R. // AIP Conference Proceedings;3/12/2009, Vol. 1097 Issue 1, p412 

    The direct interception of D- ion beam by the acceleration grid was reduced by modifying field shaping plates (FSPs) in JT-60 negative ion sources to inject powerful neutral beams for long pulse duration of >10 s. The modified FSPs are designed by a 3D simulation code to properly steer the...


Read the Article


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

Try another library?
Sign out of this library

Other Topics