Results 21 to 30 of about 326,806 (263)

Cesiated surface H− ion source: optimization studies

New Journal of Physics, 2017
The H ^− ion beam intensity required for high-energy and high-intensity proton accelerators is continuously increasing. The required 95%-beam transverse normalized root mean square emittance ( ε _95%rnms _x _/ _y ) of the beam is around 0.25 π mm mrad ...
Akira Ueno
doaj   +1 more source

Multicusp negative ion source [PDF]

Review of Scientific Instruments, 1980
The characteristics of a steady state, surface conversion, multiline-cusp negative ion source have been investigated for the production of high-energy neutral beams. With the presence of cesium, this source has been operated at a neutral pressure of 1×10−3 Torr to generate a H− ion current greater than 400 mA.
K. W. Ehlers, K. N. Leung
openaire   +1 more source

Diagnostics tools and methods for negative ion source plasmas, a review

New Journal of Physics, 2017
Plasma parameter measurements for negative hydrogen (H ^− ) ion sources have been playing an important role in clarifying fundamental physics related to negative ion production and destruction processes. Measured data of beam properties, such as H ^− ion
Katsuyoshi Tsumori, Motoi Wada
doaj   +1 more source

First Prototype of a Cesium Oven Design for Negative-Ion-Source-Based Neutral Beam Injector at ASIPP

Energies, 2022
The RF-driven negative ion source has a steady state characteristic and will be a promising ion source for neutral beam injection (NBI) in the future.
Wei Liu, Bo Liu, Yuanzhe Zhao, Qinglong Cui, Chundong Hu, Lizhen Liang   +5 more
doaj   +1 more source

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

A review of negative ion sources [PDF]

Revue de Physique Appliquée, 1977
A brief review of the present status of negative ion sources and their compatability with tandem accelerators will be presented. Recent developments of the caesium beam sputter source will be discussed in some detail including topics such as, the optimum shape of the sputter cone, the use of gases to increase either the elemental negative ion current ...
openaire   +2 more sources

Characteristics of negative ion generation in large area negative ion source based on cavity ring-down spectroscopy

He jishu
BackgroundThe neutral beam injection system (NBI) has the highest heating efficiency and the clearest physical mechanism, so it has become one of the main auxiliary heating methods used in the world's large magnetic confinement controlled thermonuclear ...
ZHU Tengsai, LIANG Lizhen, XIE Yahong, CAO Zhengkun, PENG Xufeng, HU Chundong   +5 more
doaj   +1 more source

Tomographic diagnostic of the hydrogen beam from a negative ion source

Physical Review Special Topics. Accelerators and Beams, 2011
In this paper the tomographic diagnostic developed to characterize the 2D density distribution of a particle beam from a negative ion source is described.
M. Agostini, M. Brombin, G. Serianni, R. Pasqualotto   +3 more
doaj   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Correlation of source parameters and beam properties in the early operation of the full size ITER negative ion beam source

Nuclear Fusion
One of the requirements of Heating and current drive Neutral Beam injectors for ITER is a beam homogeneity greater than 90%, to achieve an optimal beam transmission while keeping the heat load consistently low on the acceleration electrodes.
M. Ugoletti, M. Agostini, C. Poggi, E. Sartori, G. Serianni, B. Zaniol   +5 more
doaj   +1 more source