Abstract
The production of the negative hydrogen ions in a large multicusp ion source has been investigated in a double-magnetic filter (DMF) configuration. In the DMF configuration, the energetic electrons are trapped by the mirror of a magnetic multicusp field, and only the thermal electrons are present in the center of the arc chamber. A large amount of H{sup -} ions of more than 1 x 10{sup 12} cm{sup -3} are produced in the center region. The electron current extracted with the H{sup -} ions can be suppressed by a magnetic filter field in front of a plasma grid without affecting the H{sup -} ion current. The experimental data obtained in the DMF configuration are compared with those obtained in a single-magnetic filter (SMF) configuration. In the SMF configuration, the energetic electrons are present in the center region, and the magnetic filter in front of a plasma grid reduces the electron density and temperature, which results in the reduction of H{sup -} ion current as well as the electron current. The extracted electron current and the optimum gas pressure for the H{sup -} ion current are lower in the DMF configuration that those in the SMF configuration. (author).
Citation Formats
Ando, A, Takeiri, Y, Kaneko, O, Oka, Y, Wada, M, and Kuroda, T.
Production of negative hydrogen ions in a large multicusp ion source with double-magnetic filter configuration.
Japan: N. p.,
1992.
Web.
Ando, A, Takeiri, Y, Kaneko, O, Oka, Y, Wada, M, & Kuroda, T.
Production of negative hydrogen ions in a large multicusp ion source with double-magnetic filter configuration.
Japan.
Ando, A, Takeiri, Y, Kaneko, O, Oka, Y, Wada, M, and Kuroda, T.
1992.
"Production of negative hydrogen ions in a large multicusp ion source with double-magnetic filter configuration."
Japan.
@misc{etde_10111169,
title = {Production of negative hydrogen ions in a large multicusp ion source with double-magnetic filter configuration}
author = {Ando, A, Takeiri, Y, Kaneko, O, Oka, Y, Wada, M, and Kuroda, T}
abstractNote = {The production of the negative hydrogen ions in a large multicusp ion source has been investigated in a double-magnetic filter (DMF) configuration. In the DMF configuration, the energetic electrons are trapped by the mirror of a magnetic multicusp field, and only the thermal electrons are present in the center of the arc chamber. A large amount of H{sup -} ions of more than 1 x 10{sup 12} cm{sup -3} are produced in the center region. The electron current extracted with the H{sup -} ions can be suppressed by a magnetic filter field in front of a plasma grid without affecting the H{sup -} ion current. The experimental data obtained in the DMF configuration are compared with those obtained in a single-magnetic filter (SMF) configuration. In the SMF configuration, the energetic electrons are present in the center region, and the magnetic filter in front of a plasma grid reduces the electron density and temperature, which results in the reduction of H{sup -} ion current as well as the electron current. The extracted electron current and the optimum gas pressure for the H{sup -} ion current are lower in the DMF configuration that those in the SMF configuration. (author).}
place = {Japan}
year = {1992}
month = {May}
}
title = {Production of negative hydrogen ions in a large multicusp ion source with double-magnetic filter configuration}
author = {Ando, A, Takeiri, Y, Kaneko, O, Oka, Y, Wada, M, and Kuroda, T}
abstractNote = {The production of the negative hydrogen ions in a large multicusp ion source has been investigated in a double-magnetic filter (DMF) configuration. In the DMF configuration, the energetic electrons are trapped by the mirror of a magnetic multicusp field, and only the thermal electrons are present in the center of the arc chamber. A large amount of H{sup -} ions of more than 1 x 10{sup 12} cm{sup -3} are produced in the center region. The electron current extracted with the H{sup -} ions can be suppressed by a magnetic filter field in front of a plasma grid without affecting the H{sup -} ion current. The experimental data obtained in the DMF configuration are compared with those obtained in a single-magnetic filter (SMF) configuration. In the SMF configuration, the energetic electrons are present in the center region, and the magnetic filter in front of a plasma grid reduces the electron density and temperature, which results in the reduction of H{sup -} ion current as well as the electron current. The extracted electron current and the optimum gas pressure for the H{sup -} ion current are lower in the DMF configuration that those in the SMF configuration. (author).}
place = {Japan}
year = {1992}
month = {May}
}