title: Installation of a fast framing visible camera on KSTAR.
abstract: Visible camera technologies have made remarkable progress in recent years, and the fast camera has proven itself to be a capable imaging diagnostic in studies of specific fusion plasma issues such as the start-up physics, plasma wall interactions, edge-localized modes, and disruptions. For the purpose of favorable visible imaging, a fast framing camera has recently been installed on the Korea Superconducting Tokamak Advanced Research (KSTAR) device. The camera uses a complementary metal-oxide semiconductor detector with a maximum resolution of 1280x1024 at 1000 frames/s (fps) and a minimum resolution of 1280x16 at 64 kfps. A 2-m-long viewport having a novel optical rail system was installed on a tangential port to view the tokamak interior. The system is fully controlled from the main control room and protected by a shutter from deposits. To verify that the camera electronics are safe from the high magnetic field and its rapid time variation, possible influences are considered theoretically and experimentally. In this work, we present the design and installation of the fast camera system on the KSTAR device with discussions on the field variation effect issues.
authors.affiliation: National Fusion Research Institute, Gwahangno 113, Daejeon 305-333, Republic of Korea. jinil@nfri.re.kr
authors.forename: Jinil
authors.initials: J
authors.lastname: Chung
authors.forename: Deok Kyo
authors.initials: DK
authors.lastname: Lee
authors.forename: Dongcheol
authors.initials: D
authors.lastname: Seo
authors.forename: Myoung Choul
authors.initials: MC
authors.lastname: Choi