Fast time response electromagnetic disruption mitigation concept

R. Raman, T. R. Jarboe, J. E. Menard, S. P. Gerhardt, M. Ono, L. Baylor, W. S. Lay

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

8 Scopus citations

Abstract

An important and urgent issue for ITER is predicting and controlling disruptions. Tokamaks and spherical tokamaks have the potential to disrupt. Methods to rapidly quench the discharge after an impending disruption is detected are essential to protect the vessel and internal components. The warning time for the onset of some disruptions in tokamaks could be ,10 ms, which poses stringent requirements on the disruption mitigation system for reactor systems. In this proposed method, a cylindrical boron nitride projectile containing a radiative payload composed of boron, boron nitride, or beryllium particulate matter and weighing ,15 g is accelerated to velocities on the order of 1 to 2 km/s in ,2 ms in a linear rail gun accelerator. A partially fragmented capsule is then injected into the tokamak discharge in the 3- To 6-ms timescale, where the radiative payload is dispersed. The device referred to as an electromagnetic particle injector has the potential to meet the short warning timescales for which a reactor disruption mitigation system must be built. The system is fully electromagnetic, with no mechanical moving parts, which ensures high reliability after a period of long standby.

Original languageEnglish
Title of host publicationFusion Science and Technology
PublisherAmerican Nuclear Society
Pages797-805
Number of pages9
Volume68
Edition4
ISBN (Electronic)9781510811836
DOIs
StatePublished - Nov 2015

Funding

FundersFunder number
U.S. Department of EnergyDE-AC02-09CH11466, DE-SC0006757

    Keywords

    • Disruption
    • Electromagnetic particle injector
    • Mitigation

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