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Title: Lithium Pellet Injector Development for NSTX

Abstract

A pellet injector suitable for the injection of lithium and other low-Z pellets of varying mass into plasmas at precise velocities from 5 to 500 m/s is being developed for use on NSTX (National Spherical Torus Experiment). The ability to inject low-Z impurities will significantly expand NSTX experimental capability for a broad range of diagnostic and operational applications. The architecture employs a pellet-carrying cartridge propelled through a guide tube by deuterium gas. Abrupt deceleration of the cartridge at the end of the guide tube results in the pellet continuing along its intended path, thereby giving controlled reproducible velocities for a variety of pellets materials and a reduced gas load to the torus. The planned injector assembly has four hundred guide tubes contained in a rotating magazine with eight tubes provided for injection into plasmas. A PC-based control system is being developed as well and will be described elsewhere in these Proceedings. The development path and mechanical performance of the injector will be described.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab., NJ (US)
Sponsoring Org.:
USDOE Office of Science (SC) (US)
OSTI Identifier:
820198
Report Number(s):
PPPL-3902
TRN: US0305717
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 4 Dec 2003
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCELERATION; ARCHITECTURE; CONTROL SYSTEMS; DEUTERIUM; GUIDE TUBES; IMPURITIES; LITHIUM; PELLETS; PERFORMANCE; INJECTION, PELLETS

Citation Formats

G. Gettelfinger, J. Dong, R. Gernhardt, H. Kugel, P. Sichta, and J. Timberlake. Lithium Pellet Injector Development for NSTX. United States: N. p., 2003. Web. doi:10.2172/820198.
G. Gettelfinger, J. Dong, R. Gernhardt, H. Kugel, P. Sichta, & J. Timberlake. Lithium Pellet Injector Development for NSTX. United States. doi:10.2172/820198.
G. Gettelfinger, J. Dong, R. Gernhardt, H. Kugel, P. Sichta, and J. Timberlake. Thu . "Lithium Pellet Injector Development for NSTX". United States. doi:10.2172/820198. https://www.osti.gov/servlets/purl/820198.
@article{osti_820198,
title = {Lithium Pellet Injector Development for NSTX},
author = {G. Gettelfinger and J. Dong and R. Gernhardt and H. Kugel and P. Sichta and J. Timberlake},
abstractNote = {A pellet injector suitable for the injection of lithium and other low-Z pellets of varying mass into plasmas at precise velocities from 5 to 500 m/s is being developed for use on NSTX (National Spherical Torus Experiment). The ability to inject low-Z impurities will significantly expand NSTX experimental capability for a broad range of diagnostic and operational applications. The architecture employs a pellet-carrying cartridge propelled through a guide tube by deuterium gas. Abrupt deceleration of the cartridge at the end of the guide tube results in the pellet continuing along its intended path, thereby giving controlled reproducible velocities for a variety of pellets materials and a reduced gas load to the torus. The planned injector assembly has four hundred guide tubes contained in a rotating magazine with eight tubes provided for injection into plasmas. A PC-based control system is being developed as well and will be described elsewhere in these Proceedings. The development path and mechanical performance of the injector will be described.},
doi = {10.2172/820198},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 04 00:00:00 EST 2003},
month = {Thu Dec 04 00:00:00 EST 2003}
}

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