Analysis of edge density fluctuation measured by trial KSTAR beam emission spectroscopy system

A beam emission spectroscopy (BES) system based on direct imaging avalanche photodiode (APD) camera has been designed for Korea Superconducting Tokamak Advanced Research (KSTAR) and a trial system has been constructed and installed for evaluating feasibility of the design. The system contains two ca...

Full description

Saved in:
Bibliographic Details
Published in:Review of scientific instruments 2012-10, Vol.83 (10), p.10D531-10D531
Main Authors: Nam, Y U, Zoletnik, S, Lampert, M, Kovácsik, Á
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Avalanches
BEAM OPTICS
BEAMS
Beams (radiation)
CALIBRATION
Cameras
DENSITY
DESIGN
EMISSION SPECTROSCOPY
FLUCTUATIONS
Imaging
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
MIRRORS
PHOTODIODES
Photons
PLASMA DENSITY
PLASMA DIAGNOSTICS
SIMULATION
SWITCHES
SYSTEMS ANALYSIS
TOKAMAK DEVICES
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A beam emission spectroscopy (BES) system based on direct imaging avalanche photodiode (APD) camera has been designed for Korea Superconducting Tokamak Advanced Research (KSTAR) and a trial system has been constructed and installed for evaluating feasibility of the design. The system contains two cameras, one is an APD camera for BES measurement and another is a fast visible camera for position calibration. Two pneumatically actuated mirrors were positioned at front and rear of lens optics. The front mirror can switch the measurement between edge and core region of plasma and the rear mirror can switch between the APD and the visible camera. All systems worked properly and the measured photon flux was reasonable as expected from the simulation. While the measurement data from the trial system were limited, it revealed some interesting characteristics of KSTAR plasma suggesting future research works with fully installed BES system. The analysis result and the development plan will be presented in this paper.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4739078