-
Author(s):
S.K. Guharay, K. Tsumori, M. Hamabe, Y. Takeiri, O. Kaneko, T. Kuroda
-
Title:
Simple Emittance Measurement of H- Beams from a Large Plasma Source
Date of publication:
Mar. 1996
-
Key words:
H^- beam, neutral beam injector, emittance measurements, pepper-pot method, Kapton foil detector
-
Abstract:
An emittance meter is developed using pepper-pot method. Kapton foils are used to detect intensity distributions of small beamlets at the "image" plane of the pepper-pot. Emittance of H^- beams from a large plasma source for the neutral beam injector of the Large Helical Device (LHD) has been measured The normalized emittance (95%) of a 6 mA H^- beam with emission current density of about 10 mA/cm^2 is ~ 0.59 mm mrad. The present system is very simple, and it eliminates many complexities of the existing schemes.
-
|
