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Title: Fast Time Response Electromagnetic Disruption Mitigation Concept

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 similar to 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.

Authors:
 [1];  [1];  [2];  [3];  [3];  [3];  [2];  [1]
  1. Univ. of Washington, Seattle, WA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1335330
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Fusion Science and Technology
Additional Journal Information:
Journal Volume: 68; Journal Issue: 4; Journal ID: ISSN 1536-1055
Publisher:
American Nuclear Society
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; electromagnetic particle injector; disruption; mitigation; INDUCTANCE GRADIENT; ITER; RAILGUNS

Citation Formats

Raman, R., Jarboe, T., Jernigan, Thomas C., Menard, J., Gerhardt, S. P., Ono, M., Baylor, Larry R., and Lay, W. S. Fast Time Response Electromagnetic Disruption Mitigation Concept. United States: N. p., 2015. Web. doi:10.13182/FST14-916.
Raman, R., Jarboe, T., Jernigan, Thomas C., Menard, J., Gerhardt, S. P., Ono, M., Baylor, Larry R., & Lay, W. S. Fast Time Response Electromagnetic Disruption Mitigation Concept. United States. doi:10.13182/FST14-916.
Raman, R., Jarboe, T., Jernigan, Thomas C., Menard, J., Gerhardt, S. P., Ono, M., Baylor, Larry R., and Lay, W. S. Mon . "Fast Time Response Electromagnetic Disruption Mitigation Concept". United States. doi:10.13182/FST14-916. https://www.osti.gov/servlets/purl/1335330.
@article{osti_1335330,
title = {Fast Time Response Electromagnetic Disruption Mitigation Concept},
author = {Raman, R. and Jarboe, T. and Jernigan, Thomas C. and Menard, J. and Gerhardt, S. P. and Ono, M. and Baylor, Larry R. and Lay, W. S.},
abstractNote = {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 similar to 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.},
doi = {10.13182/FST14-916},
journal = {Fusion Science and Technology},
number = 4,
volume = 68,
place = {United States},
year = {2015},
month = {9}
}

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