Access Restriction

Author Combs, S.K. ♦ Baylor, L.R. ♦ Foust, C.R. ♦ Jernigan, T.C. ♦ Anderson, P.M. ♦ Robinson, J.I.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1999
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword Plasma accelerators ♦ Variable speed drives ♦ Guns ♦ Plasma confinement ♦ Laboratories ♦ Deuterium ♦ Hydrogen ♦ Magnetic confinement ♦ Acceleration ♦ Tokamaks
Abstract The pellet fueling system on DIII-D has been modified for injection of deuterium pellets from two vertical ports and two inner wall locations on the magnetic high-field side (HFS) of the tokamak. The HFS pellet injection technique was first employed on ASDEX-Upgrade with significant improvements reported in both pellet penetration and fueling efficiency. The new pellet injection schemes on DIII-D required the installation of new guide tubes. These lines are /spl ap/12.5 m in total Length and are made up of complex bends and turns ("roller coaster" like) to route pellets from the injector to the plasma, including sections inside the torus. The pellet speed at which intact pellets can survive through the curved guide tubes is limited (/spl ap/200-300 m/s for HFS injection schemes). Thus, one of the three gas guns on the injector was modified to provide pellets in a lower speed regime than the original guns (normal speed range 2500 to 1000 m/s). The guide tube installations and gun modifications are described along with the injector operating parameters, and the latest test results are highlighted.
Description Author affiliation: Oak Ridge Nat. Lab., TN, USA (Combs, S.K.)
ISBN 0780358295
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1999-10-25
Publisher Place USA
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 452.00 kB
Page Count 4
Starting Page 202
Ending Page 205

Source: IEEE Xplore Digital Library