Results 71 to 80 of about 1,118,371 (206)

The photon-ion merged-beams experiment PIPE at PETRAIII - The first five years

, 2018
The Photon-Ion Spectrometer at PETRA III - in short, PIPE - is a permanently installed user facility at the "Variable Polarization XUV Beamline" P04 of the synchrotron light source PETRA III operated by DESY in Hamburg, Germany. The careful design of the
Bari, S., Beerwerth, R., Borovik Jr., A., Buhr, T., Fritzsche, S., Hellhund, J., Holste, K., Klumpp, S., Martins, M., Mertens, K., Müller, A., Perry-Sassmannshausen, A., Reinwardt, S., Ricz, S., Schippers, S., Schubert, K.   +15 more
core   +1 more source

Design considerations for high-intensity negative ion sources [PDF]

Nuclear Instruments and Methods, 1965
Abstract An attempt has been made to improve the output of negative hydrogen ions, which are extracted directly from a hot-cathode Philips-ion-gauge type of discharge. The discharge chamber has been modified to accord with assumptions made as to the probable formation mechanism of the negative ions observed.
openaire   +3 more sources

First experiments with the negative ion source NIO1

Review of Scientific Instruments, 2015
Neutral Beam Injectors (NBIs), which need to be strongly optimized in the perspective of DEMO reactor, request a thorough understanding of the negative ion source used and of the multi-beamlet optics. A relatively compact radio frequency (rf) ion source, named NIO1 (Negative Ion Optimization 1), with 9 beam apertures for a total H− current of 130 mA ...
Cavenago M, Serianni G, De Muri M, Agostinetti P, Antoni V, Baltador C, Barbisan M, Baseggio L, Bigi M, Cervaro V, Degli Agostini F, Fagotti E, Kulevoy T, Ippolito N, Laterza B, Minarello A, Maniero M, Pasqualotto R, Petrenko S, Poggi M, Ravarotto D, Recchia M, Sartori E, Sattin M, Sonato P, Taccogna F, Variale V, Veltri P, Zaniol B, Zanotto L, Zucchetti S   +30 more
openaire   +5 more sources

Performance prediction of radio frequency based negative ion source using fusion neural network model

Nuclear Fusion
To accelerate the development of a radio frequency negative ion source (RF-NIS), a fusion neural network model has been developed to simulate and predict the performance of RF-NIS under set working parameters.
Yu Gu, Chundong Hu, Yang Li, Yuwen Yang, Yahong Xie, Qinglong Cui, Yuanzhe Zhao   +6 more
doaj   +1 more source

Discharge characterization of two-region arc plasma (TRAP) ion source

Nuclear Engineering and Technology
The Korea Atomic Energy Research Institute (KAERI) is developing a novel Two-Region Arc Plasma Ion Source (TRAP) as a negative hydrogen (deuterium) ion source for a Neutral Beam Injection (NBI) system in a fusion tokamak.
Kihyun Lee, Seung Ho Jeong, Tae-Seong Kim, Dae-Sik Chang, Sung-Ryul Huh   +4 more
doaj   +1 more source

Experimental investigation of double layers in expanding plasmas

, 2015
Double layers (DLs) have been observed in a plasma reactor composed of a source chamber attached to a larger expanding chamber. Positive ion beams generated across the DL were characterized in the low plasma potential region using retarding field energy ...
Chabert, P., Corr, C. S., Plihon, N.
core   +1 more source

Present status of numerical modeling of hydrogen negative ion source plasmas and its comparison with experiments: Japanese activities and their collaboration with experimental groups

New Journal of Physics, 2018
The present status of kinetic modeling of particle dynamics in hydrogen negative ion (H ^− ) source plasmas and their comparisons with experiments are reviewed and discussed with some new results.
A Hatayama, S Nishioka, K Nishida, S Mattei, J Lettry, K Miyamoto, T Shibata, M Onai, S Abe, S Fujita, S Yamada, A Fukano   +11 more
doaj   +1 more source

100 seconds and megawatt negative ion beam accelerations at the CRAFT NNBI test facility

Nuclear Fusion
A promising negative-ion-based neutral beam injection (NNBI) system should achieve high energy, high power and long pulse simultaneously for the plasma heating and current drive in the large-scale fusion devices. A NNBI test facility has been constructed
Jianglong Wei, Yuwen Yang, Wei Liu, Yongjian Xu, Yuchen Qu, Yuming Gu, Yahong Xie, Chundong Hu, Lizhen Liang   +8 more
doaj   +1 more source

Development of Calorimeter Target for Long Pulse High Power Negative Ion Source Test Platform

南方能源建设
[Introduction] High energy, strong current, and long pulse neutral beam negative ion source technology are one of the core technologies for achieving combustion conditions in magnetic confinement fusion reactor plasma.
Hongxia ZHOU, Yinxiang WAN, Bowen ZHOU, Peixuan YU, Peiqin TANG, Huiling WEI   +5 more
doaj   +1 more source

Radiofrequency and 2.45 GHz electron cyclotron resonance H− volume production ion sources

New Journal of Physics, 2016
The volume production of negative hydrogen ions ( ${{\rm{H}}}^{-}$ ) in plasma ion sources is based on dissociative electron attachment (DEA) to rovibrationally excited hydrogen molecules (H _2 ), which is a two-step process requiring both, hot electrons
O Tarvainen, S X Peng
doaj   +1 more source