Author:
Ju Lee Young,Taek Park Hyun,Su Kim Jong,Gu Kwak Jong
Abstract
Abstract
First neutral beam injection system for the KSTAR tokamak has been operated after the installation and commissioning on 2010. To provide 120 keV and more than 6 MW deuterium neutral beam, it requires large vacuum pumping system with the pumping speeds 1.0E6 l/s range. For this purpose, R&D works with a prototype cryosorption panel had performed from Korea Atomic Energy Research Institute (KAERI) and GM cooler based 2 stage cryosorption pump was accepted for the 1st NBI system. During 10 years of annual operation, the pumping speeds decreased continuously due to the damage in cryopanels and all of the cryopanels were repaired for the 2021 KSTAR campaign. Details of the 1st KSTAR NBI vacuum pumping system will be introduced and long operation results including the behavior after the repair, will be reported in this paper.
Reference9 articles.
1. Commissioning of the first KSTAR neutral beam injection system and beam experiments;Bae;Fusion Engineering and Design
2. Design of neutral beam injection system for KSTAR tokamak;Chang;Fusion Engineering and Design,2011
3. Pumping characteristics of the prototype cryosorption panel for the KSTAR NBI system;In;Journal of the Korean Physical Society,2007
4. Hydrogen adsorption properties of the large cryosorption pump;In;Journal of the Korean Vacuum Society,2005
5. Fabrication test of an engineering model cryo-sorption pump of KAERI test stand for KSTAR NBI;Cho;Journal of Plasma Fusion Research,2000