title: Triton burnup measurements in KSTAR using a neutron activation system.
abstract: Measurements of the time-integrated triton burnup for deuterium plasma in Korea Superconducting Tokamak Advanced Research (KSTAR) have been performed following the simultaneous detection of the d-d and d-t neutrons. The d-d neutrons were measured using a3He proportional counter, fission chamber, and activated indium sample, whereas the d-t neutrons were detected using activated silicon and copper samples. The triton burnup ratio from KSTAR discharges is found to be in the range 0.01%-0.50% depending on the plasma conditions. The measured burnup ratio is compared with the prompt loss fraction of tritons calculated with the Lorentz orbit code and the classical slowing-down time. The burnup ratio is found to increase as plasma current and classical slowing-down time increase.
authors.affiliation: Department of Nuclear Engineering, Seoul National University, Seoul 151-744, South Korea.
authors.forename: Jungmin
authors.initials: J
authors.lastname: Jo
authors.affiliation: National Fusion Research Institute, Daejeon 34133, South Korea.
authors.forename: MunSeong
authors.initials: M
authors.lastname: Cheon
authors.affiliation: Korea University of Science and Technology, Daejeon 34133, South Korea.
authors.forename: Jun Young
authors.initials: JY
authors.lastname: Kim
authors.affiliation: National Fusion Research Institute, Daejeon 34133, South Korea.
authors.forename: T
authors.initials: T
authors.lastname: Rhee
authors.affiliation: National Fusion Research Institute, Daejeon 34133, South Korea.
authors.forename: Junghee
authors.initials: J
authors.lastname: Kim
authors.affiliation: Department of Nuclear Engineering, Seoul National University, Seoul 151-744, South Korea.
authors.forename: Yue-Jiang
authors.initials: YJ
authors.lastname: Shi
authors.affiliation: National Institute for Fusion Science, Toki-shi, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Isobe
authors.affiliation: National Institute for Fusion Science, Toki-shi, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Ogawa
authors.affiliation: Department of Nuclear Engineering, Seoul National University, Seoul 151-744, South Korea.
authors.forename: Kyoung-Jae
authors.initials: KJ
authors.lastname: Chung
authors.affiliation: Department of Nuclear Engineering, Seoul National University, Seoul 151-744, South Korea.
authors.forename: Y S
authors.initials: YS
authors.lastname: Hwang