Hard x-ray bursts observed in association with Rayleigh-Taylor instigated current disruption in a solar-relevant lab experiment
Abstract
Here, measurements by multiple X-ray detectors show transient emission of a 1 μs pulse of non-mono-energetic ~6 keV X-rays by a cold, dense MHD-driven plasma jet. Because the collision mean free path is much smaller than the jet dimensions, the acceleration of particles to high energy was not expected. The X-ray pulse occurs when the jet undergoes a kink instability which accelerates the jet laterally so that a fast-growing secondary Rayleigh-Taylor instability is triggered which then breaks the jet. The jet breaking is correlated in time with several other fast changing phenomena. It is proposed that despite the short collision mean free path, an inductive electric field associated with this breaking accelerates a certain subgroup of electrons to keV energies without any of these electrons undergoing collisions. Moreover, it is proposed that after being accelerated to high energy, these fast electrons are suddenly decelerated via collisions and radiate X-rays.
- Authors:
-
[1];
[1]
- California Inst. of Technology (CalTech), Pasadena, CA (United States). Applied Physics and Materials Science
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); US Air Force Office of Scientific Research (AFOSR)
- OSTI Identifier:
- 1574939
- Grant/Contract Number:
- FG02-04ER54755
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 25; Journal Issue: 11; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Marshall, R. S., Flynn, M. J., and Bellan, P. M. Hard x-ray bursts observed in association with Rayleigh-Taylor instigated current disruption in a solar-relevant lab experiment. United States: N. p., 2018.
Web. doi:10.1063/1.5054927.
Marshall, R. S., Flynn, M. J., & Bellan, P. M. Hard x-ray bursts observed in association with Rayleigh-Taylor instigated current disruption in a solar-relevant lab experiment. United States. https://doi.org/10.1063/1.5054927
Marshall, R. S., Flynn, M. J., and Bellan, P. M. Thu .
"Hard x-ray bursts observed in association with Rayleigh-Taylor instigated current disruption in a solar-relevant lab experiment". United States. https://doi.org/10.1063/1.5054927. https://www.osti.gov/servlets/purl/1574939.
@article{osti_1574939,
title = {Hard x-ray bursts observed in association with Rayleigh-Taylor instigated current disruption in a solar-relevant lab experiment},
author = {Marshall, R. S. and Flynn, M. J. and Bellan, P. M.},
abstractNote = {Here, measurements by multiple X-ray detectors show transient emission of a 1 μs pulse of non-mono-energetic ~6 keV X-rays by a cold, dense MHD-driven plasma jet. Because the collision mean free path is much smaller than the jet dimensions, the acceleration of particles to high energy was not expected. The X-ray pulse occurs when the jet undergoes a kink instability which accelerates the jet laterally so that a fast-growing secondary Rayleigh-Taylor instability is triggered which then breaks the jet. The jet breaking is correlated in time with several other fast changing phenomena. It is proposed that despite the short collision mean free path, an inductive electric field associated with this breaking accelerates a certain subgroup of electrons to keV energies without any of these electrons undergoing collisions. Moreover, it is proposed that after being accelerated to high energy, these fast electrons are suddenly decelerated via collisions and radiate X-rays.},
doi = {10.1063/1.5054927},
journal = {Physics of Plasmas},
number = 11,
volume = 25,
place = {United States},
year = {Thu Nov 01 00:00:00 EDT 2018},
month = {Thu Nov 01 00:00:00 EDT 2018}
}
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Works referencing / citing this record:
Acceleration of charged particles to extremely large energies by a sub-Dreicer electric field
journal, April 2019
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