Speaker
Kwang-Pyo Kim
(National Fusion Research Institute)
Description
To achieve the high performance plasma in the Korea Superconducing Tokamak Advanced Research (KSTAR) tokamak, Neutral Beam Injection (NBI) system has been installed and upgraded. The first NBI (NBI-1) was installed in 2010, which provides a 100 keV deuterium neutral beam of 6 MW maximum using three ion sources. The second NBI (NBI-2) with another 6 MW will complete to be constructed by 2018. As the vacuum can have substantial effect on the beam performance, the design of the Vacuum Pumping System (VPS) for NBI-2 has been carefully conducted. Accordingly, the operation results of the VPS for NBI-1 was analyzed and feedbacked to the design of NBI-2. In particular, the cryosortion pump, which is used to exhaust the massive gas inrushing from ion sources and a neutralizer, emergied as a major design issue. In this paper, the design of cryosorption pumps for NBI-2 were derived and the overall vacumm of NBI-2 was analyzed including turbo pumps, mechanical booster pumps, and dry pumps.
Co-authors
Hong-Tack Kim
(National Fusion Research Institute, DAEJEON, South Korea)
Hyun Taek Park
(National Fusion Research Institute, DAEJEON, South Korea)
Jongsu Kim
(National Fusion Research Institute, DAEJEON, South Korea)
Kaprai Park
(National Fusion Research Institute, DAEJEON, South Korea)
Kwang-Pyo Kim
(National Fusion Research Institute, DAEJEON, South Korea)
Nak Hyoun Song
(National Fusion Research Institute, DAEJEON, South Korea)
Sang Woo Kwna
(National Fusion Research Institute, DAEJEON, South Korea)
Sonjong Wang
(National Fusion Research Institute, DAEJEON, South Korea)
Yaungsoo Kim
(National Fusion Research Institute, DAEJEON, South Korea)
Yong Bok Chang
(National Fusion Research Institute, DAEJEON, South Korea)
Yong Chu
(National Fusion Research Institute, DAEJEON, South Korea)
