title: Study on an azimuthal line cusp ion source for the KSTAR neutral beam injector.
abstract: In this study it is found that the cusp magnetic field configuration of an anode bucket influences the primary electron behavior. An electron orbit code (ELEORBIT code) showed that an azimuthal line cusp (cusp lines run azimuthally with respect to the beam extraction direction) provides a longer primary electron confinement time than an axial line cusp configuration. Experimentally higher plasma densities were obtained under the same arc power when the azimuthal cusp chamber was used. The newly designed azimuthal cusp bucket has been investigated in an effort to increase the plasma density in its plasma generator per arc power.
authors.affiliation: Korea Atomic Energy Research Institute, Daejeon, Republic of Korea.
authors.forename: Seung Ho
authors.initials: SH
authors.lastname: Jeong
authors.forename: Doo-Hee
authors.initials: DH
authors.lastname: Chang
authors.forename: Sang Ryul
authors.initials: SR
authors.lastname: In
authors.forename: Kwang Won
authors.initials: KW
authors.lastname: Lee
authors.forename: Byung-Hoon
authors.initials: BH
authors.lastname: Oh
authors.forename: Byung-Joo
authors.initials: BJ
authors.lastname: Yoon
authors.forename: Woo Sob
authors.initials: WS
authors.lastname: Song
authors.forename: Jinchoon
authors.initials: J
authors.lastname: Kim
authors.forename: Tae Seong
authors.initials: TS
authors.lastname: Kim