NDLI: Acceleration of solid hydrogen pellet using augmented railgun for magnetic fusion reactor refueling

Content Provider	IEEE Xplore Digital Library
Author	Zhang, J. Kim, K. King, T.L.
Copyright Year	1965
Abstract	A 1.2 m long electromagnetic railgun with separate augmentation was designed, fabricated, and tested for the purpose of injecting hypervelocity hydrogen pellets into magnetic fusion devices for refueling. A compact configuration of two pairs of coaxial rails insulated by thin Kapton films was employed. Two pulse-forming networks were used to separately control the duration, amplitude, and overlap of the current pulses. Copper sulphate resistors were employed as impedance-matching resistors and bank short resistors. The magnetic field inside the gun bore boosted by the high current on the gun augmentation rails, which in turn increased the J/spl times/B force without increasing the armature current, resulting in less ablation of the gun bore and pellet. Higher acceleration was achieved due to reduced inertial and viscous drag. Using a 1.2 m augmented railgun, hydrogen pellet velocities in excess of 2.5 km/s were achieved. Hydrogen pellet accelerations as high as 4.4/spl times/10/sup 6/ m/s/sup 2/ were achieved at a railgun current of 13.5 kA while the acceleration obtained on a conventional railgun was 2.2/spl times/10/sup 6/ m/s/sup 2/ at 14.1 kA. Computer simulations have been performed using the finite element code MSC/EMES to analyze the current density, magnetic field, Lorentz force, and inductance gradient of the conventional and augmented railguns.<>
Sponsorship	IEEE Magnetics Society
Starting Page	382
Ending Page	387
Page Count	6
File Size	495154
File Format	PDF
ISSN	00189464
Volume Number	31
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acceleration Solids Hydrogen Railguns Resistors Rails Magnetic fields Boring Electromagnetic devices Testing
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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