Tokamak T-10 soft x-ray imaging diagnostic

Abstract

Tangential x-ray imaging system for analysis of the small-scale modes in the T-10 tokamak Rev.

Extreme ultra-violet movie camera for imaging microsecond time scale magnetic reconnection

“…Time-resolved fast imaging of extreme ultra-violet (EUV) and soft x-ray radiation is useful to understand magnetic reconnection, magnetohydrodynamic (MHD) activity, particle and energy transport, plasma stability, and turbulence in laboratory plasmas such as tokamaks [1][2][3][4] spheromaks, 5 reversed field pinches, 6 and stellarators. 7 Since visible light technology does not work at EUV wavelengths, conventional optical schemes based on mirrors and lenses cannot be used to collect radiation and form images.…”

“…Various EUV imaging methods have been used previously, most particularly pinhole cameras 3,4,6,7 and diode arrays. 1,2,5 Pinhole cameras consist of a small pinhole to form an image, a micro-channel plate intensifier shutter that converts EUV into fast electrons, a scintillator/phosphor to convert the fast electrons into a visible light image, and a visible light camera to record the phosphor image. Pinhole cameras have the advantage of simplicity, but have extremely low sensitivity because of the necessarily small pinhole photon collection efficiency.…”