Results 21 to 30 of about 5,097,999 (301)
An analysis of pump-induced artificial ionospheric ion upwelling at EISCAT [PDF]
, 2010 Ion outflow from the high-latitude ionosphere is a well-known phenomenon and an important source of plasma for the magnetosphere. It is also well known that pumping the ionosphere with high-power high-frequency radio waves causes electron heating.
Kosch, M.J. +4 more
core +4 more sources
RF Plasma source for a Heavy Ion Fusion injector [PDF]
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2005 Abstract We are developing high-current ion sources for Heavy Ion Fusion (HIF) applications. Our proposed RF plasma source starts with an array of high current density mini-beamlets (of a few milliampere each at ∼100 mA/cm 2 ) that are kept separated from each other within a set of acceleration grids. After they have gained sufficient kinetic energy (
Westenskow, G A +4 more
openaire +2 more sources
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
Operation of Large RF Driven Negative Ion Sources for Fusion at Pressures below 0.3 Pa
Plasma, 2021 The large (size: 1 m × 2 m) radio frequency (RF) driven negative ion sources for the neutral beam heating (NBI) systems of the future fusion experiment ITER will be operated at a low filling pressure of 0.3 Pa, in hydrogen or in deuterium.
Dirk Wünderlich +4 more
doaj +1 more source
Study of RF Stray Currents in ITER Neutral Beam Test Facilities
Applied Sciences, 2021 The operation of SPIDER (Source for the Production of Ions of Deuterium Extracted from Radio-frequency plasma), full-scale prototype of ITER NBI (Neutral Beam Injector) radio-frequency ion source, pointed out deleterious effects caused by stray Radio ...
Riccardo Casagrande +4 more
doaj +1 more source
Negative Hydrogen Ion Sources for Fusion: From Plasma Generation to Beam Properties
Frontiers in Physics, 2021 The neutral beam injection systems for the international fusion experiment ITER used for heating, current drive, and diagnostic purposes are based on RF-driven negative hydrogen ion sources with a source area of roughly 0.9 m × 1.9 m. The sources operate
U. Fantz +4 more
doaj +1 more source
SensorsThis study presents the development of a ferrite core inductively coupled plasma (ICP) radio frequency (RF) ion source designed to improve the lifetime of ion sources in commercial ion implanters.
Jong-Jin Hwang +2 more
doaj +1 more source
Optimizing the ITER NBI ion source by dedicated RF driver test stand
, 2023 The experimental fusion reactor ITER will feature two heating neutral beam injectors (NBI) capable of delivering 33(50) MW of power into the plasma. NBI consists of a plasma source for production of negative ions (extracted negative ion current up to ...
Mario I +3 more
core
Evaluation of a New Vocus Reagent-Ion Source and Focusing Ion-Molecule Reactor for use in Proton-Transfer-Reaction Mass Spectrometry [PDF]
, 2018 We evaluate the performance of a new chemical ionization source called Vocus, consisting of a discharge reagent-ion source and focusing ion-molecule reactor (FIMR) for use in protontransfer-reaction time-of-flight mass spectrometry (PTR-TOF) measurements
Douglas R., Worsnop +13 more
core +2 more sources
Specialized turbomolecular pumping stage for RF ion thrusters [PDF]
, 2011 This paper proposes the application of a highly specialized Turbomolecular Vacuum Pump (TMP) device as a subsystem for electrostatic RF ion thrusters, using D. Fearn’s Dual-Stage 4-Grid design as a cutting-edge example. The TMP turbine’s rotor impulse is
Leonov, Max
core +2 more sources