Results 21 to 30 of about 4,784,253 (254)

Estimation of neutral beam injector power transferred to KSTAR plasmas

Nuclear Engineering and Technology
KSTAR shows the long pulse capability based on superconducting magnet and NBI plays a crucial role in sustaining the plasma via plasma heating and current driving.
Jong-Gu Kwak, J.H. Jeong, S.C. Hong
doaj   +1 more source

Negative ion research at the Culham Centre for Fusion Energy (CCFE)

New Journal of Physics, 2016
A summary of negative ion development work being presently undertaken at the Culham Centre for Fusion Energy is given. The small negative ion facility has an RF driven volume ion source with beam extraction at energies up to 30 keV. The extracted beam of
R McAdams, A J T Holmes, D B King, E Surrey, I Turner, J Zacks   +5 more
doaj   +1 more source

Long-pulse ion source for neutral-beam applications

Vacuum, 1983
A rectangular ion source is being developed for producing 120-keV/25-A hydrogen ion beams for pulse durations up to 10 s. It consists of a plasma generator with a rectangular arc chamber (25×35 cm cross section) and an ion accelerator with rectangular grids (10×25 cm hole pattern). The plasma generator is a modified duoPIGatron type.
C. C. Tsai, M. M. Menon, P. M. Ryan, D. E. Schechter, W. L. Stirling, H. H. Haselton   +5 more
  +5 more sources

THE DOUBLET III NEUTRAL BEAM SOURCE CRYOPANEL SYSTEM [PDF]

IEEE Transactions on Nuclear Science, 1979
A cryogenic pumping system is designed to provide 1.4 × 106 l/sec. of hydrogen pumping speed for the Doublet III neutral beam ion source. The cryopump is made up of two elements; a cylindrical unit which uses a "Santeler" type of liquid nitrogen shield and a flat chevron shielded disk.
Tanabe, J., Yamamoto, R., Arend, P.V.
openaire   +3 more sources

Experimental and simulation study on the backstreaming positive ions on the quarter-size negative ion source for CRAFT NNBI test facility

Nuclear Engineering and Technology
As an effective methods of plasma heating, neutral beam injection (NBI) systems based on negative hydrogen ion sources will be utilized in future magnetic-confinement nuclear fusion experiments.
Yongjian Xu, Yuwen Yang, Jianglong Wei, Ling Yu, Wen Deng, Rixin Wang, Yuming Gu, Chundong Hu, Yahong Xie   +8 more
doaj   +1 more source

Semiempirical zero-dimensional approach for the estimation of beam features from plasma parameters in proton sources

Physical Review Accelerators and Beams, 2020
Beam intensity, proton fraction, and beam emittance represent the most important characteristics of a beam extracted by a proton source. Beam parameters are strongly related to the parameters of the plasma from which the beam is extracted.
G. Castro
doaj   +1 more source

Flexural Behavior of 3D‐Printed Porous Bouligand‐Structured Polymers: Influence of Pitch Angle and Porosity

Advanced Engineering Materials, EarlyView.
This study examines how helicoidal architectures with different porosities respond to bending. Adjusting layer angle and spacing in 3D‐printed polymers reveals clear tradeoffs between stiffness, strength, and energy absorption. Experiments and simulations highlight designs that distribute stress effectively, offering pathways for optimizing lightweight
Praveenkumar Subhash Patil, Edward D. McCarthy, Parvez Alam   +2 more
wiley   +1 more source

Contributions of the extended ELISE and BATMAN Upgrade test facilities to the roadmap towards ITER NBI

Nuclear Fusion
ITER’s NBI systems are a first of its kind system with very challenging targets for the RF-driven ion source and the acceleration stage. In a step ladder approach, the ion source test facilities BATMAN Upgrade (BUG) and ELISE support the activities ...
U. Fantz, D. Wünderlich, C. Wimmer, M. Barnes, N. den Harder, B. Heinemann, A. Heiler, M. Lindqvist, F. Merk, A. Navarro, R. Nocentini, G. Orozco, R. Riedl, D. Yordanov, D. Zielke   +14 more
doaj   +1 more source

Density Measurement of Irradiated and Nonirradiated Zirconium Oxide by Ptychographic X‐Ray Computed Tomography (PXCT)

Advanced Engineering Materials, EarlyView.
Mass density governs the protective behavior of oxide layers on nuclear fuel cladding. Ptychographic X‐ray computed tomography measures zirconium oxide grown on Zircaloy‐4 under reactor and autoclave conditions, revealing nearly identical bulk densities of 5.1 ± 0.80 g cm−3.
Okan Yetik, Liliana I. Duarte, Malgorzata G. Makowska, Roland Brütsch, Andrej Bullemer, Ana Diaz, Mirko Holler, Andreas Menzel, Johannes Bertsch, Pavel Trtik   +9 more
wiley   +1 more source

ITER-relevant 600 s steady-state extraction of negative hydrogen ions at the test facility ELISE

Nuclear Fusion
The neutral beam heating system for the future international fusion experiment ITER will be based on radio-frequency driven ion sources delivering a large (≈1 × 2 m ^2 ) and homogeneous negative hydrogen or deuterium ion beam of several ten Amperes for ...
D. Wünderlich, R. Riedl, M. Fröschle, A. Heiler, A. Navarro, D. Yordanov, A. Döring, U. Fantz   +7 more
doaj   +1 more source