Details

Autor(en) / Beteiligte

• Fukumasa, Osamu
• Nishida, Ryo

Titel

Extraction Probability of Negative Ions from Hydrogen Ion Sources - Effects of Filter Magnetic Field and Gas Pressure

Ist Teil von

• AIP conference proceedings, 2005, Vol.763 (1), p.159-167

Ort / Verlag

United States

Erscheinungsjahr

2005

Beschreibungen/Notizen

• Trajectories of H- ions are calculated numerically by solving the 3D motion equation, including effects of collisional destruction, elastic collisions and charge exchange collisions. According to these trajectories, extraction probability of H- ions produced at any location inside the source and energy of extracted H- ions are discussed as a function of gas pressure. Effects of production zone and filter magnetic field on extraction probability are also discussed. The probability for surface produced H- ions keeps nearly the constant value, and that for volume produced H- ions decreases with gas pressure. The kinetic energy of extracted H- ions is reduced mainly by charge exchange collision.