Negative ion production and beam extraction processes in a large ion source (invited)
نویسندگان
چکیده
منابع مشابه
Uniform Negative Ion Beam Extraction in a Cesium-Seeded Large Negative Ion Source with a Tent Magnetic Filter
For improvement of spatial uniformity of negative ion beams, the external magnetic filter was replaced to a novel tent-shaped magnetic filter in the JAEA 10 ampere negative ion source. The tent filter geometry is based on new findings in surface production of negative ions in high electron temperature plasmas. In order to link the tent filter, the original line-cusp field configuration on the s...
متن کاملRelationship between production and extraction of D/H negative ions in a volume negative ion source
Pure volume production of D negative ions is studied in rectangular negative ion source equipped with an external magnetic filter (MF). Production and control of D2 plasma with the MF is nearly the same as that of H2 plasmas. Plasma parameters (ne and Te) in D2 plasmas are varied mainly in the downstream region by changing the magnetic field intensity of the MF (i.e., BMF), although the values ...
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Particle loss due to space charge effects is a severe problem in the low energy section of accelerators. The extraction system and beam transport sections are the most sensitive parts. Especially for the case of a laser-ion source (LIS) the extraction of ions from very dense plasma can lead to a high current density in the extraction gap. To make use of this high current density (i.e. to maximi...
متن کاملSimulation of H- ion source extraction systems for the Spallation Neutron Source with Ion Beam Simulator.
A three-dimensional ion optical code IBSimu, which is being developed at the University of Jyväskylä, features positive and negative ion plasma extraction models and self-consistent space charge calculation. The code has been utilized for modeling the existing extraction system of the H(-) ion source of the Spallation Neutron Source. Simulation results are in good agreement with experimental da...
متن کاملElectron beam ion sources and traps „invited..
The electron beam method of stepwise ionization to highest charge states has found applications in electron beam ion sources ~EBISs! for accelerators and atomic physics collision experiments as well as in electron beam ion traps ~EBITs! for x-ray and mass spectroscopy. A dense and almost monoenergetic electron beam provides a unique tool for ionization, because radiative recombination by slow e...
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ژورنال
عنوان ژورنال: Review of Scientific Instruments
سال: 2016
ISSN: 0034-6748,1089-7623
DOI: 10.1063/1.4938254