Negative ion sources
نویسندگان
چکیده
منابع مشابه
Effect of Coulomb collision on the negative ion extraction mechanism in negative ion sources.
To improve the H(-) ion beam optics, it is necessary to understand the energy relaxation process of surface produced H(-) ions in the extraction region of Cs seeded H(-) ion sources. Coulomb collisions of charged particles have been introduced to the 2D3V-PIC (two dimension in real space and three dimension in velocity space particle-in-cell) model for the H(-) extraction by using the binary co...
متن کاملSheath structure in negative ion sources for fusion (invited).
In fusion negative ion sources, the negative ions are formed on the caesiated plasma grid predominantly by hydrogen atoms from the plasma. The space charge of the negative ions leaving the wall is not fully compensated by incoming positive ions and at high enough emission a virtual cathode is formed. This virtual cathode limits the flux of negative ions transported across the sheath to the plas...
متن کاملSize Scaling of Negative Hydrogen Ion Sources for Fusion
The RF-driven negative hydrogen ion source (H , D ) for the international fusion experiment ITER has a width of 0.9 m and a height of 1.9 m and is based on a scale prototype source being in operation at the IPP test facilities BATMAN and MANITU for many years. Among the challenges to meet the required parameters in a caesiated source at a source pressure of 0.3 Pa or less is the challenge in si...
متن کاملReview of Negative Hydrogen Ion Sources High Brightness/high Current
Due to the development of reliable H ion sources, charge-exchange injection into circular accelerators has become routine. This paper reviews recent developments in negative hydrogen ion sources. The underlying physics, operating parameters and beam characteristics of selected sources will be described and compared. Figure 1: History of duoplasmatron and surface source development.
متن کاملEffects of a Weak Transverse Magnetic Field and a Spatial Potential on Negative Ion Transport in Negative Ion Sources
The effects of the weak magnetic field on the negative ion ( ) extraction in a negative ion source have been studied by means of a two-dimensional electrostatic particle simulation. A particle-in-cell (PIC) model is used which simulates the motion of the charged particles in their self-consistent electric field. Since most electrons are magnetized by the weak magnetic field, it is shown that mo...
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ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2021
ISSN: 0021-8979,1089-7550
DOI: 10.1063/5.0049289