Biography
Brent
Jones received the B.S. degree in physics from the University
of Washington, Seattle,
WA, in 1997, and the Ph.D. degree in
physics from Princeton
University in
2002. His graduate thesis work at
the Princeton Plasma Physics Laboratory employed ~10 GHz heterodyne
radiometry to measure time-resolved electron temperature profiles via
detection of mode-converted electron Bernstein wave emissions in a
spherical tokamak.
In
2002, he joined the Center for Pulsed Power Sciences at Sandia National
Laboratories, Albuquerque,
NM, as a member of the
technical staff. His research
interests include fundamental z-pinch dynamics, wire arrays for K-shell
x-ray production, monochromatic x-ray imaging of dense z-pinches, and
seeded perturbations for the study of instabilities in imploding wire
arrays.
He has
led experiments on Sandia's 20 MA Z machine to
study wire array dynamics of Al and stainless steel loads designed for
production of 1-10 keV K-shell x-rays. In collaboration with C.A. Coverdale
(Org. 1344) and others, 50 kJ of 6.7 keV K-shell
radiation has been produced from implosion of nested stainless steel wire
arrays. This yield is anticipated to
scale up to 200 kJ when the 26 MA refurbished Z machine comes back online
in 2007.
Dr.
Jones has led the development of multilayer-mirror-based imagers on Z and
Saturn to view 100-700 eV monochromatic self-emission during the implosion and stagnation phases
of wire array and gas puff implosions.
A current research thrust is to jointly analyze spatially resolved
>1 keV K-shell spectra and <1 keV monochromatic imaging in order to infer plasma
temperature and density profiles for understanding z-pinch implosion and
stagnation physics.
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X-ray radiographs of steel wire array
instability growth (Z)
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Imposed perturbations seed predictable
evolution of implosion instability (MAGPIE)
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Localized Na dopant
K-shell lines (two at left) used to track particle transport in an Al
pinch (Zebra)
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277 eV (red)
and
>1 keV (yellow) self-emission imaging (Z)
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Selected Publications
- B. Jones, C. Deeney, C. A. Coverdale, P. D. LePell,
J. L. McKenney, J. P. Apruzese,
J. W. Thornhill, K. G. Whitney, R. W. Clark,
A. L. Velikovich, J. Davis, Y. Maron, V. Kantsyrev, A. Safronova, and V. I. Oreshkin,
K-shell radiation physics in
low- to moderate-atomic-number z-pinch plasmas on the Z accelerator,
J. Quant. Spectrosc. Radiat.
Transfer 99, 341 (2006).
(Invited talk, RPHDM 2004)
- J. W. Thornhill,
A. L. Velikovich, R. W. Clark, J. P. Apruzese, J. Davis, K. G. Whitney, P. L. Coleman,
C. A. Coverdale, C. Deeney, B. Jones, and P.
D. LePell, Assessing the ZR Machine’s Potential for Producing
Multi-keV X-Ray Yields in K-Shell Line and
Free-Bound Continuum Radiation, IEEE T. Plasma Sci.
34, 2377 (2006).
- B. Jones, C. Deeney, C. A. Coverdale, C. J. Meyer, and P. D. LePell, Multilayer
mirror monochromatic self-emission x-ray imaging on the Z accelerator,
Rev. Sci. Instrum.
77, 10E316 (2006).
- B. Jones, C. Deeney, C. A. Coverdale, C. J. Meyer, and P. D. LePell, Monochromatic
X-Ray Self-Emission Imaging of Imploding Wire Array Z-Pinches on the Z
Accelerator, IEEE T. Plasma Sci. 34, 213-222 (2006).
(Invited talk, ICOPS 2005)
- B. Jones, C. Deeney, A. Pirela, C.
Meyer, D. Petmecky, P. Gard,
R. Clark, and J. Davis, Design
of a multilayer mirror monochromatic x-ray imager for the Z
accelerator, Rev. Sci. Instrum. 75,
4029 (2004).
- B. Jones, C. J. Garasi, D. J. Ampleford,
C. Deeney, T. A. Mehlhorn,
S. N. Bland, S. V. Lebedev, J. P.
Chittenden, S. C. Bott, J. B. A. Palmer, G.
N. Hall, and J. Rapley, Measurement and modeling of the implosion of wire arrays with
seeded instabilities, Phys. Plasmas 13, 056313-1-7 (2006).
(Invited talk, APS DPP05)
- B. Jones, C. Deeney, J. L. McKenney,
C. J. Garasi, T. A. Mehlhorn,
A. C. Robinson, S. E. Wunsch, S. N. Bland,
S.V. Lebedev, J. P. Chittenden, S. C. Bott, D. J. Ampleford,
J. B. A. Palmer, J. Rapley, G. N. Hall, and
B.V. Oliver, Study of
Three-Dimensional Structure in Wire-Array Z Pinches by Controlled
Seeding of Axial Modulations in Wire Radius, Phys. Rev. Lett. 95,
225001 (2005).
- B. Jones, C. Deeney, J. L.
McKenney, J. E. Garrity,
D. K. Lobley, K. L. Martin, A. E. Griego, J. P. Ramacciotti,
S. N. Bland, S. V. Lebedev, S. C. Bott, D. J. Ampleford,
J. B. A. Palmer, J. Rapley, G. Hall, Chemically etched modulation in
wire radius for wire array z-pinch perturbation studies, Rev. Sci. Instrum. 75, 5030 (2004).
- B. Jones, G. Taylor, P.
C. Efthimion, and T. Munsat,
Measurement of the magnetic
field in a spherical torus plasma via electron Bernstein wave emission
harmonic overlap, Phys. Plasmas 11, 1028 (2004).
- B. Jones, P. C. Efthimion, G. Taylor, T. Munsat,
J. R. Wilson, J. C. Hosea, R. Kaita, R. Majeski, R. Maingi, S. Shiraiwa, J. Spaleta,
and A. K. Ram, Controlled
optimization of mode conversion from electron Bernstein waves to
extraordinary mode in magnetized plasma, Phys. Rev. Lett. 90,
165001 (2003).
Top
of page
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Brent
Jones —
Senior Member of the Technical Staff, Organization 1673
Contact information
Brent Jones
(bmjones@sandia.gov)
505-284-9481 (office)
505-530-9192 (pager)
505-350-1108 (cell)
505-845-7685 (FAX)
Mailing address:
Sandia National Laboratories
PO Box 5800,
MS 1193
Albuquerque, NM 87185-1193
Last updated:
6/12/2007
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