Absolute Calibration of a Normal Incidence Vacuum Spectrometer Using Synchrotron Radiation

Autor: Kubo, Hirotaka, Sakasai, Akira, Nishino, Nobuhiro, Koide, Yoshihiko, Akaoka, Nobuo, Hara, Makoto, Chiba, Shinichi, Sugie, Tatsuo, Takeuchi, Hiroshi, Tanaka, Kenichiroh, Maezawa, Hideki, Yamaguchi, Naohiro
Zdroj: Japanese Journal of Applied Physics; December 1989, Vol. 28 Issue: 12 p2610-2610, 1p
Abstrakt: A normal incidence spectrometer was absolutely calibrated for light 700-1250 Å in the first order and 350-650 Å in the second order using synchrotron radiation at the Photon Factory, National Laboratory for High Energy Physics. The spectrometer was equipped with a 0.4 m, 2400 grooves/mm ruled concave grating with an Al+MgF2coating and a blaze angle of 6.9°, and a multichannel detector. Synchrotron radiation was monochromatized by a 1 m Seya-Namioka monochromator, and the absolute intensity of the incident photon flux was measured with a windowless far-UV photodiode calibrated at the National Institute of Standards and Technology, USA. The error in the sensitivity calibration was estimated to be 13-35%. The spectrometer is used to study impurity behaviors in the JT-60 tokamak.
Databáze: Supplemental Index