An increased of H ion beam current whenever argon gas is added has been observed. The physics behind argon effect is that in the production of more H atoms, a part of H atoms will be converted to H2*(v>4) to increa...An increased of H ion beam current whenever argon gas is added has been observed. The physics behind argon effect is that in the production of more H atoms, a part of H atoms will be converted to H2*(v>4) to increase H- density. Increase of nH depends on the rate of added Ar η %, primary filling pressure P, electron density neAr and recombination coefficient 7 of H atom. Adding 25% Ar is optimal, although there have been assumed various parameters. Increase of nH depends on decreased recombination coefficient 7, and increased primary filling pressure P. The increase of nH is small when the pressure P < 0.3 Pa. Optimized volume size L/R^2 is optimal for obtaining a maximum Ar effect.展开更多
文摘An increased of H ion beam current whenever argon gas is added has been observed. The physics behind argon effect is that in the production of more H atoms, a part of H atoms will be converted to H2*(v>4) to increase H- density. Increase of nH depends on the rate of added Ar η %, primary filling pressure P, electron density neAr and recombination coefficient 7 of H atom. Adding 25% Ar is optimal, although there have been assumed various parameters. Increase of nH depends on decreased recombination coefficient 7, and increased primary filling pressure P. The increase of nH is small when the pressure P < 0.3 Pa. Optimized volume size L/R^2 is optimal for obtaining a maximum Ar effect.
