A neutral lithium beam source

Zhang, XiaoDong; Wang, ZhengMin; Hu, LiQun
April 1994
Review of Scientific Instruments;Apr94, Vol. 65 Issue 4, p1231
Academic Journal
A low energy neutral lithium beam source with energy about 6 kev and a neutral beam equivalent current of 20 µA/cm² has been developed in ASIPP in order to measure the density gradient and the fluctuations in the edge plasma of the HT-6M tokamak. In the source, lithium ions are extracted from a solid emitter (β-eueryptite), focused in a two-tube immersion lens, and neutralized in a charge-exchange cell with sodium. This source operates in pulsed mode. The pulse length is adjustable from 10 to 100 ms.


Related Articles

  • Development of a high-brightness and low-divergence lithium neutral beam for a Zeeman polarimetry on JT-60U. Kojima, Atshushi; Kamiya, Kensaku; Iguchi, Harukazu; Fujita, Takaaki; Kakiuchi, Hideto; Kamada, Yutaka // Review of Scientific Instruments;Sep2008, Vol. 79 Issue 9, p093502 

    A high-brightness and low-divergence neutral beam is obtained for a Zeeman polarimetry of edge plasmas on JT-60U. The electron density and the pitch angle of the magnetic field line, thus the plasma current density distribution, can be measured by the Zeeman polarimetry using the lithium beam. A...

  • Long pulse operation of a cesium-seeded multicusp H- ion source. Okumura, Y.; Hanada, M.; Inoue, T.; Mizuno, M.; Ohara, Y.; Suzuki, Y.; Tanaka, H.; Tanaka, M.; Watanabe, K. // Review of Scientific Instruments;Apr92, Vol. 63 Issue 4, p2708 

    It is demonstrated that a cesium-seeded volume H[sup -] ion source can be operated very stably for long pulse durations of up to 24 h. The source consists of a 20 cm cylindrical multicusp plasma generator and a 9 cm × 10 cm multiaperture extractor. By seeding a small amount of cesium, the...

  • Semi-analytical Modeling of the NIO1 Source. Cazzador, M.; Cavenago, M.; Serianni, G.; Veltri, P. // AIP Conference Proceedings;2015, Vol. 1655 Issue 1, p1 

    NIO1 is a compact and versatile negative ion source, with a total current of 130 mA accelerated to 60 keV. Negative ions are created inside the plasma, which is inductively coupled to an external rf cylindrical coil operating in the range of 2 ± 0.2 MHz. The plasma is confined in the source...

  • Lithium Jet Neutralizer to Improve Negative Ion Neutral Beam Performance. Grisham, L. R. // AIP Conference Proceedings;3/12/2009, Vol. 1097 Issue 1, p364 

    Fusion neutral beam systems have conventionally used gas cells of the beam isotope as neutralizers. In the design of negative ion beam systems for ITER, and likely also for future reactors, the large gas efflux arising from these cells can lead to many problems. We discuss the possibility of...

  • Control system for 5 MW neutral beam ion source for SST1. Patel, G. B.; Onali, Raja; Sharma, Vivek; Suresh, S.; Tripathi, V.; Bandyopadhyay, M.; Singh, N. P.; Thakkar, Dipal; Gupta, L. N.; Singh, M. J.; Patel, P. J.; Chakraborty, A. K.; Baruah, U. K.; Mattoo, S. K. // Review of Scientific Instruments;Jan2006, Vol. 77 Issue 1, p013501 

    This article describes the control system for a 5 MW ion source of the NBI (neutral beam injector) for steady-state superconducting tokamak-1 (SST-1). The system uses both hardware and software solutions. It comprises a DAS (data acquisition system) and a control system. The DAS is used to read...

  • Beam deflection by plasma grid filter current in the negative-ion source for JT-60U neutral beam injection system. Umeda, N.; Ikeda, Y.; Hanada, M.; Inoue, T.; Kawai, M.; Kazawa, M.; Komata, M.; Mogaki, K.; Ohga, T. // Review of Scientific Instruments;Mar2006, Vol. 77 Issue 3, p03A529 

    In the JT-60U negative-ion-based neutral beam injection system, the effect of negative ion and electron deflection by the plasma grid (PG) magnetic filter was studied. After a long-pulse operation of up to 19 s, a local melting was observed on the beamline near the ion source, facing the...

  • Characterization of 1 MW, 40 keV, 1 s neutral beam for plasma heating. Sorokin, A.; Belov, V.; Davydenko, V.; Deichuli, P.; Ivanov, A.; Podyminogin, A.; Shikhovtsev, I.; Shulzhenko, G.; Stupishin, N.; Tiunov, M. // Review of Scientific Instruments;Feb2010, Vol. 81 Issue 2, p02B108 

    Neutral beam with geometrical focusing for plasma heating in moderate-size plasma devices has been developed in Budker Institute of Nuclear Physics, Novosibirsk. When operated with hydrogen, the neutral beam power is 1 MW, pulse duration is 1 s, beam energy is 40 keV, and angular divergence is...

  • Effect of beam limiting aperture and collector potential on multi-element focused ion beams. Paul, Samit; Chowdhury, Abhishek; Bhattacharjee, Sudeep // Review of Scientific Instruments;Feb2012, Vol. 83 Issue 2, p02B714 

    A compact microwave driven plasma based multi-element focused ion beam system has been developed. In the present work, the effect of reduced beam limiter (BL) aperture on the focused ion beam parameters, such as current and spot size, and a method of controlling beam energy independently by...

  • Cesium Delivery System for Negative Ion Source at IPR. Bansal, G.; Pandya, K.; Bandyopadhyay, M.; Chakraborty, A.; Singh, M. J.; Soni, J.; Gahlaut, A.; Parmar, K. G. // AIP Conference Proceedings;9/26/2011, Vol. 1390 Issue 1, p614 

    The technique of surface production of negative ions using cesium, Cs, has been efficiently exploited over the years for producing negative ion beams with increased current densities from negative ion sources used on neutral beam lines. Deposition of Cs on the source walls and the plasma grid...


Read the Article


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

Try another library?
Sign out of this library

Other Topics