Results 221 to 230 of about 26,082 (263)

Neutral beam injection with an improved accelerator for LHD

Review of Scientific Instruments, 2008
The beam profiles, port-through, rates and injection powers obtained with an improved accelerator with the multislot grounded grid are described. The accelerator has a combination of a steering grid with racetrack shaped aperture and multislot grounded grid to improve the beam optics.
K, Tsumori, M, Osakabe, O, Kaneko, Y, Takeiri, K, Nagaoka, Y, Oka, K, Ikeda, M, Shibuya, E, Asano, S, Komada, T, Kondo, M, Sato   +11 more
openaire   +2 more sources

Plasma Initiation by Neutral Beam Injection

Fusion Science and Technology, 2010
A unique and reliable method of plasma initiation has been established in the Large Helical Device (LHD) by using neutral beam (NB) injection into vacuum.
O. Kaneko, Y. Takeiri, K. Tsumori, M. Osakabe, K. Ikeda, K. Nagaoka, H. Nakano   +6 more
openaire   +1 more source

Status of the ITER neutral beam injection system.

The Review of scientific instruments, 2008
The ITER neutral beam injectors are the first injectors to be designed to operate under conditions and constraints similar to those that will be encountered with a fusion reactor. The injectors will use a single large ion source and accelerator that will produce 40 A D(-) 1 MeV beams for pulse lengths of up to 3600 s.
Hemsworth R S, Tanga A, Antoni V
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Engineering of Cryopump for Neutral Beam Injection

Plasma Science and Technology, 2006
Neutrals beam injection (NBI) has proven to be a very effective method for plasma heating. A set of positive-ion-based NBI system is being designed, manufactured and tested at ASIPP. The aim of this study was to ascertain the most effective cryocondensation pump structure for the hydrogen NBI system.
Xie yuanlai, Hu Chundong, Ouyang Zhengrong   +2 more
openaire   +1 more source

The MAST neutral beam injection system

Fusion Engineering and Design, 2001
Two neutral beam injectors will provide both plasma heating and current drive on the MAST tokamak using beamlines on loan from Oak Ridge National Laboratory. Progress is reported regarding the following engineering challenges in achieving beam energies up to 70 keV and pulse lengths up to 5 s: design of carbon fibre composite, hypervapotron and ...
M.P.S Nightingale, G.W Crawford, S.J Gee, D.J Hurford, D Martin, M.R Simmonds, R.T.C Smith, C.C Tsai, S.E.V Warder   +8 more
openaire   +1 more source

Impurity control by neutral-beam injection

Nuclear Fusion, 1979
A recently developed generalization of neoclassical theory is applied to study the use of neutral-beam injection to drive impurities out of a tokamak plasma. The theory accounts for the direct momentum exchange between beam and plasma, which has been studied previously, and also for the effects of the beam in altering the first-order particle flows and
W.M. Stacey, D.J. Sigmar
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Beam intensity distributions in neutral beam injection systems

Nuclear Instruments and Methods, 1977
Abstract Formulas are derived analytically for beam intensity profiles for focused multi-aperture sources. These formulas are used to estimate beam transmission, beam intensity variation along the beam axis, the effect of beamlet divergence and focusing on intensity distributions, and beam power loading to beamline components in single- and multi ...
Jinchoon Kim, J.H. Whealton
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Numerical techniques used in Neutral Beam Injection modules

Computer Physics Communications, 2004
Abstract This paper describes and compares the numerical techniques for computing the Neutral Beam Injection (NBI) physics used in NBI modules in several integrated modeling codes. The Monte-Carlo NUBEAM module and the Fokker–Planck NBI ASTRA, DBEAMS, FPP, and NBEAMS neutral beam injection modules are considered.
Alexei Pankin, Glenn Bateman, Robert Budny, Arnold Kritz, Douglas McCune, Alexei Polevoi, Irina Voitsekhovitch   +6 more
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First neutral beam injection experiments on KSTAR tokamak

Review of Scientific Instruments, 2012
The first neutral beam (NB) injection system of the Korea Superconducting Tokamak Advanced Research (KSTAR) tokamak was partially completed in 2010 with only 1/3 of its full design capability, and NB heating experiments were carried out during the 2010 KSTAR operation campaign.
S H, Jeong, D H, Chang, T S, Kim, S R, In, K W, Lee, J T, Jin, D S, Chang, B H, Oh, Y S, Bae, J S, Kim, H T, Park, K, Watanabe, T, Inoue, M, Kashiwagi, M, Dairaku, H, Tobari, M, Hanada   +16 more
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Plasma Heating by Neutral Beam Injection

Fusion Technology, 2000
The additional heating of plasmas by injection of fast neutrals - or Neutral Beam Injection (NBI) - is reviewed. First, the limitations of ohmic heating in tokamaks and the other motivations for using additional heating in fusion machines are discussed.
openaire   +1 more source