NDLI: Pellet injector development and experiments at ORNL

Content Provider	IEEE Xplore Digital Library
Author	Baylor, L.R. Argo, B.E. Barber, G.C. Combs, S.K. Cole, M.J. Dyer, G.R. Fehling, D.T. Fisher, P.W. Foster, C.A. Foust, C.R. Gouge, M.J. Jernigan, T.C. Langley, R.A. Milora, S.L. Qualls, A.L. Schechter, D.E. Sparks, D.O. Tsai, C.C. Wilgen, J.B. Whealton, J.H.
Copyright Year	1993
Description	Author affiliation: Oak Ridge Nat. Lab., TN, USA (Baylor, L.R.; Argo, B.E.; Barber, G.C.; Combs, S.K.; Cole, M.J.; Dyer, G.R.; Fehling, D.T.; Fisher, P.W.; Foster, C.A.; Foust, C.R.; Gouge, M.J.; Jernigan, T.C.; Langley, R.A.; Milora, S.L.; Qualls, A.L.; Schechter, D.E.; Sparks, D.O.; Tsai, C.C.; Wilgen, J.B.; Whealton, J.H.)
Abstract	The development of pellet injectors for plasma fueling of magnetic confinement fusion experiments has been under way at Oak Ridge National Laboratory (ORNL) for the past 15 years. Recently, ORNL provided a tritium-compatible four-shot pneumatic injector for the Tokamak Fusion Test Reactor (TFTR) based on the in situ condensation technique that features three single-stage gas guns and an advanced two-stage light gas gun driver. In another application, ORNL supplied the Tore Supra tokamak with a centrifuge pellet injector in 1989 for pellet fueling experiments that has achieved record numbers of injected pellets into a discharge. Work is progressing on an upgrade to that injector to extend the number of pellets to 400 and improve pellet repeatability. In a new application, the ORNL three barrel repeating pneumatic injector has been returned from JET and is being readied for installation on the DIII-D device for fueling and enhanced plasma performance experiments. In addition to these experimental applications, ORNL is developing advanced injector technologies, including high-velocity pellet injectors, tritium pellet injectors, and long-pulse feed systems. The two-stage light gas gun and electron-beam-driven rocket are the acceleration techniques under investigation for achieving high velocity. A tritium proof-of-principle (TPOP) experiment has demonstrated the feasibility of tritium pellet production and acceleration. A new tritium-compatible, extruder-based, repeating pneumatic injector is being fabricated to replace the pipe gun in the TPOP experiment and will explore issues related to the extrudability of tritium and acceleration of large tritium pellets. The tritium pellet formation experiments and development of long-pulse pellet feed systems are especially relevant to the International Tokamak Engineering Reactor (ITER).
Starting Page	583
Ending Page	588
File Size	498286
Page Count	6
File Format	PDF
ISBN	0780314123
DOI	10.1109/FUSION.1993.518401
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1993-10-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Tokamaks Acceleration Inductors Feeds Plasma confinement Magnetic confinement Laboratories Testing Guns Plasma accelerators
Content Type	Text
Resource Type	Article

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The ORNL plasma fueling program

New pellet injection schemes on DIII-D

High-speed repetitive pellet injector for plasma fueling of magnetic confinement fusion devices

Development of pellet injection systems for ITER

Design of a tritium pellet injector for TFTR

A new two-stage pellet injector for FTU

Pellet Fueling of ITER Burning Plasmas

Development of continuous pellet injector for Large Helical Device

Compact flexible pellet injection system for plasma fueling experiments

Pellet injector development and experiments at ORNL

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