NDLI: Pellet acceleration using an ablation-controlled electrothermal launcher

Content Provider	IEEE Xplore Digital Library
Author	Kincaid, R.W. Bourham, M.A. Gilligan, J.G.
Copyright Year	1995
Description	Author affiliation: Dept. of Nucl. Eng., North Carolina State Univ., Raleigh, NC, USA (Kincaid, R.W.; Bourham, M.A.; Gilligan, J.G.)
Abstract	The NCSU ablation-controlled electrothermal launcher SIRENS has been used to accelerate plastic (Lexan polycarbonate) pellets to investigate the possibility of using electrothermal launchers as frozen pellet injectors for tokamak fueling. Successful installation of such a device would include a protective shell (sabot) to shield the hydrogenic pellet from ablation and allow it to maintain its integrity throughout the acceleration. The SIRENS device has been modified to include specially designed barrel sections equipped with diagnostic ports. A pulse forming network (PFN), provides a longer pulse length of 250 /spl mu/s, which allows for an extended period of pellet acceleration. Pellet masses between 300 and 1000 milligrams were used, and plastic sabots with 70 milligram plastic payloads were also tested. Measured velocities are in the range of 1500 m/s for the short pulse shots and 2000 m/s for the PFN long pulse shots. The 1D, time dependent gas dynamics code "ODIN" was modified to include a section to model the pellet's movement, and the additional pellet terms were included in the set of governing equations. The pellet movement as predicted by the code compared favorably with experimental results, and the plasma parameters within the electrothermal launcher behaved as predicted.
Starting Page	1613
Ending Page	1616
File Size	380917
Page Count	4
File Format	PDF
ISBN	0780329694
DOI	10.1109/FUSION.1995.534533
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-09-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acceleration Electrothermal effects Electrothermal launching Plastics Pulse measurements Tokamaks Protection Payloads Testing Velocity measurement
Content Type	Text
Resource Type	Article

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