-
Author(s):
I. Viniar and S. Sudo
-
Title:
New Pellet Production and Acceleration Technologies for High Speed Pellet Injection System "HIPEL" in Large Helical Device
Date of publication:
Dec. 1994
-
Key words:
pellet, injector, pellet injection, fueling, pipe gun, two-stage gas gun, repeating pellet injector, HIPEL, Large Helical Device
-
Abstract:
New technologies of pellet production and acceleration for fueling and diagnostics purposes in large thermonuclear reactors are proposed. The technologies are intended to apply to the multiple-pellet injection system "HIPEL" for Large Helical Device of NIFS in Japan. The pellet production technology has already been tested in a pipe-gun type pellet injector. It will realize the repeating pellet injection by means of decreasing of the pellet formation time into the pipe-gun barrel. The acceleration technology is based upon a new pump tube operation in two-stage gas gun and also upon a new pump tube operation in two- stage gas gun and also upon a new conception of the allowable pressure acting on a pellet into a barrel. Some preliminary estimations have been made, and principles of a pump tube construction providing for reliable long term operation in the repeating mode without any troubles from a piston are proposed.
-
|
