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R. B. Stephens
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Journal Articles

Transport and spatial energy deposition of relativistic electrons in copper-doped fast ignition plasmas

L. C. Jarrott, C. McGuffey, F. N. Beg, A. A. Solodov, W. Theobald, B. Qiao, C. Stoeckl, R. Betti, H. Chen, J. Delettrez, T. Döppner, E. M. Giraldez, V. Y. Glebov, H. Habara, T. Iwawaki, M. H. Key, R. W. Luo, F. J. Marshall, H. S. McLean, C. Mileham, P. K. Patel, J. J. Santos, H. Sawada, R. B. Stephens, T. Yabuuchi, M. S. Wei
Journal: Physics of Plasmas
Phys. Plasmas 24, 102710 (2017)
https://doi.org/10.1063/1.4999108
Published: October 2017
View article titled, Transport and spatial energy deposition of relativistic electrons in copper-doped fast ignition plasmas
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Journal Articles

Observation of extremely strong shock waves in solids launched by petawatt laser heating

K. L. Lancaster, A. P. L. Robinson, J. Pasley, P. Hakel, T. Ma, K. Highbarger, F. N. Beg, S. N. Chen, R. L. Daskalova, R. R. Freeman, J. S. Green, H. Habara, P. Jaanimagi, M. H. Key, J. King, R. Kodama, K. Krushelnick, H. Nakamura, M. Nakatsutsumi, A. J. MacKinnon, A. G. MacPhee, R. B. Stephens, L. Van Woerkom, P. A. Norreys
Journal: Physics of Plasmas
Phys. Plasmas 24, 083115 (2017)
https://doi.org/10.1063/1.5000064
Published: August 2017
View article titled, Observation of extremely strong shock waves in solids launched by petawatt laser heating
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Journal Articles

Calibration and characterization of a highly efficient spectrometer in von Hamos geometry for 7-10 keV x-rays

Editor’s Pick
L. C. Jarrott, M. S. Wei, C. McGuffey, F. N. Beg, P. M. Nilson, C. Sorce, C. Stoeckl, W. Theoboald, H. Sawada, R. B. Stephens, P. K. Patel, H. S. McLean, O. L. Landen, S. H. Glenzer, T. Döppner
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 88, 043110 (2017)
https://doi.org/10.1063/1.4981793
Published: April 2017
View article titled, Calibration and characterization of a highly efficient spectrometer in von Hamos geometry for 7-10 keV x-rays
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Journal Articles

Investigation into the dynamics of laser-cut foil X-pinches and their potential use for high repetition rate operation

G. W. Collins, IV, M. P. Valdivia, T. O. Zick, J. Kim, D. M. Haas, A. C. Forsman, R. B. Stephens, F. N. Beg
Journal: Applied Physics Letters
Appl. Phys. Lett. 105, 024101 (2014)
https://doi.org/10.1063/1.4889748
Published: July 2014
View article titled, Investigation into the dynamics of laser-cut foil X-pinches and their potential use for high repetition rate operation
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Journal Articles

Effect of defocusing on picosecond laser-coupling into gold cones

I. A. Bush, A. G. R. Thomas, L. Gartside, S. Sarfraz, E. Wagenaars, J. S. Green, M. Notley, H. Lowe, C. Spindloe, T. Winstone, A. P. L. Robinson, R. Clarke, T. Ma, T. Yabuuchi, M. Wei, F. N. Beg, R. B. Stephens, A. MacPhee, A. J. MacKinnon, M. H. Key, W. Nazarov, M. Sherlock, J. Pasley
Journal: Physics of Plasmas
Phys. Plasmas 21, 012702 (2014)
https://doi.org/10.1063/1.4861375
Published: January 2014
View article titled, Effect of defocusing on picosecond laser-coupling into gold cones
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Journal Articles

Investigation of relativistic intensity laser generated hot electron dynamics via copper Kα imaging and proton acceleration

L. Willingale, A. G. R. Thomas, A Maksimchuk, A. Morace, T. Bartal, J. Kim, R. B. Stephens, M. S. Wei, F. N. Beg, K. Krushelnick
Journal: Physics of Plasmas
Phys. Plasmas 20, 123112 (2013)
https://doi.org/10.1063/1.4853575
Published: December 2013
View article titled, Investigation of relativistic intensity laser generated hot electron dynamics via copper K<sub>α</sub> imaging and proton acceleration
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Journal Articles

Note: Characterization of a high-photon-energy X-ray imager

M. Storm, B. Eichman, Z. Zhong, W. Theobald, P. Schiebel, C. Mileham, C. Stoeckl, I. A. Begishev, G. Fiksel, R. B. Stephens, R. R. Freeman, K. U. Akli
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 84, 106103 (2013)
https://doi.org/10.1063/1.4825139
Published: October 2013
View article titled, Note: Characterization of a high-photon-energy X-ray imager
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Journal Articles

Improved laser-to-proton conversion efficiency in isolated reduced mass targets

A. Morace, C. Bellei, T. Bartal, L. Willingale, J. Kim, A. Maksimchuk, K. Krushelnick, M. S. Wei, P. K. Patel, D. Batani, N. Piovella, R. B. Stephens, F. N. Beg
Journal: Applied Physics Letters
Appl. Phys. Lett. 103, 054102 (2013)
https://doi.org/10.1063/1.4816595
Published: July 2013
View article titled, Improved laser-to-proton conversion efficiency in isolated reduced mass targets
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Journal Articles

Comparisons of angularly and spectrally resolved Bremsstrahlung measurements to two-dimensional multi-stage simulations of short-pulse laser-plasma interactions

C. D. Chen, A. J. Kemp, F. Pérez, A. Link, F. N. Beg, S. Chawla, M. H. Key, H. McLean, A. Morace, Y. Ping, A. Sorokovikova, R. B. Stephens, M. Streeter, B. Westover, P. K. Patel
Journal: Physics of Plasmas
Phys. Plasmas 20, 052703 (2013)
https://doi.org/10.1063/1.4804348
Published: May 2013
View article titled, Comparisons of angularly and spectrally resolved Bremsstrahlung measurements to two-dimensional multi-stage simulations of short-pulse laser-plasma interactions
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Journal Articles

Proton emission from cone-in-shell fast-ignition experiments at Omega

N. Sinenian, W. Theobald, J. A. Frenje, C. Stoeckl, F. H. Séguin, C. K. Li, R. D. Petrasso, R. B. Stephens
Journal: Physics of Plasmas
Phys. Plasmas 19, 112708 (2012)
https://doi.org/10.1063/1.4767636
Published: November 2012
View article titled, Proton emission from cone-in-shell fast-ignition experiments at Omega
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Journal Articles

Temporally resolved characterization of shock-heated foam target with Al absorption spectroscopy for fast electron transport study

T. Yabuuchi, H. Sawada, S. P. Regan, K. Anderson, M. S. Wei, R. Betti, J. Hund, M. H. Key, A. J. Mackinnon, H. S. McLean, R. R. Paguio, P. K. Patel, K. M. Saito, R. B. Stephens, S. C. Wilks, F. N. Beg
Journal: Physics of Plasmas
Phys. Plasmas 19, 092705 (2012)
https://doi.org/10.1063/1.4752749
Published: September 2012
View article titled, Temporally resolved characterization of shock-heated foam target with Al absorption spectroscopy for fast electron transport study
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Journal Articles

Proton trajectories and electric fields in a laser-accelerated focused proton beam

M. E. Foord, T. Bartal, C. Bellei, M. Key, K. Flippo, R. B. Stephens, P. K. Patel, H. S. McLean, L. C. Jarrott, M. S. Wei, F. N. Beg
Journal: Physics of Plasmas
Phys. Plasmas 19, 056702 (2012)
https://doi.org/10.1063/1.3700181
Published: April 2012
View article titled, Proton trajectories and electric fields in a laser-accelerated focused proton beam
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Journal Articles

Electron and ion dynamics during the expansion of a laser-heated plasma under vacuum

C. Bellei, M. E. Foord, T. Bartal, M. H. Key, H. S. McLean, P. K. Patel, R. B. Stephens, F. N. Beg
Journal: Physics of Plasmas
Phys. Plasmas 19, 033109 (2012)
https://doi.org/10.1063/1.3696003
Published: March 2012
View article titled, Electron and ion dynamics during the expansion of a laser-heated plasma under vacuum
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Journal Articles

A novel zirconium Kα imager for high energy density physics research

K. U. Akli, M. Sanchez del Rio, S. Jiang, M. S. Storm, A. Krygier, R. B. Stephens, N. R. Pereira, E. O. Baronova, W. Theobald, Y. Ping, H. S. McLean, P. K. Patel, M. H. Key, R. R. Freeman
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 82, 123503 (2011)
https://doi.org/10.1063/1.3665931
Published: December 2011
View article titled, A novel zirconium Kα imager for high energy density physics research
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Journal Articles

Using time-integrated Kα images to study refluxing and the extent of pre-plasmas in intense laser-plasma experiment

V. M. Ovchinnikov, D. W. Schumacher, G. E. Kemp, A. G. Krygier, L. D. Van Woerkom, K. U. Akli, R. R. Freeman, R. B. Stephens, A. Link
Journal: Physics of Plasmas
Phys. Plasmas 18, 112702 (2011)
https://doi.org/10.1063/1.3656957
Published: November 2011
View article titled, Using time-integrated K<sub>α</sub> images to study refluxing and the extent of pre-plasmas in intense laser-plasma experiment
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Journal Articles

Initial cone-in-shell fast-ignition experiments on OMEGA

W. Theobald, A. A. Solodov, C. Stoeckl, K. S. Anderson, R. Betti, T. R. Boehly, R. S. Craxton, J. A. Delettrez, C. Dorrer, J. A. Frenje, V. Yu. Glebov, H. Habara, K. A. Tanaka, J. P. Knauer, R. Lauck, F. J. Marshall, K. L. Marshall, D. D. Meyerhofer, P. M. Nilson, P. K. Patel, H. Chen, T. C. Sangster, W. Seka, N. Sinenian, T. Ma, F. N. Beg, E. Giraldez, R. B. Stephens
Journal: Physics of Plasmas
Phys. Plasmas 18, 056305 (2011)
https://doi.org/10.1063/1.3566082
Published: May 2011
View article titled, Initial cone-in-shell fast-ignition experiments on OMEGA
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Journal Articles

Single-shot divergence measurements of a laser-generated relativistic electron beam

F. Perez, S. D. Baton, M. Koenig, C. D. Chen, D. Hey, M. H. Key, S. Le Pape, T. Ma, H. S. McLean, A. G. MacPhee, P. K. Patel, Y. Ping, F. N. Beg, D. P. Higginson, C. W. Murphy, H. Sawada, B. Westover, T. Yabuuchi, K. U. Akli, E. Giraldez, M. Hoppe, Jr., C. Shearer, R. B. Stephens, L. Gremillet, E. Lefebvre, R. R. Freeman, G. E. Kemp, A. G. Krygier, L. D. Van Woerkom, R. Fedosejevs, R. H. Friesen, Y. Y. Tsui, D. Turnbull
Journal: Physics of Plasmas
Phys. Plasmas 17, 113106 (2010)
https://doi.org/10.1063/1.3514595
Published: November 2010
View article titled, Single-shot divergence measurements of a laser-generated relativistic electron beam
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Journal Articles

High-intensity laser-plasma interaction with wedge-shaped-cavity targets

W. Theobald, V. Ovchinnikov, S. Ivancic, B. Eichman, P. M. Nilson, J. A. Delettrez, R. Yan, G. Li, F. J. Marshall, D. D. Meyerhofer, J. F. Myatt, C. Ren, T. C. Sangster, C. Stoeckl, J. D. Zuegel, L. Van Woerkom, R. R. Freeman, K. U. Akli, E. Giraldez, R. B. Stephens
Journal: Physics of Plasmas
Phys. Plasmas 17, 103101 (2010)
https://doi.org/10.1063/1.3484217
Published: October 2010
View article titled, High-intensity laser-plasma interaction with wedge-shaped-cavity targets
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Journal Articles

Correlation between laser accelerated MeV proton and electron beams using simple fluid model for target normal sheath acceleration

M. Tampo, S. Awano, P. R. Bolton, K. Kondo, K. Mima, Y. Mori, H. Nakamura, M. Nakatsutsumi, R. B. Stephens, K. A. Tanaka, T. Tanimoto, T. Yabuuchi, R. Kodama
Journal: Physics of Plasmas
Phys. Plasmas 17, 073110 (2010)
https://doi.org/10.1063/1.3459063
Published: July 2010
View article titled, Correlation between laser accelerated MeV proton and electron beams using simple fluid model for target normal sheath acceleration
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Journal Articles

Transport study of intense-laser-produced fast electrons in solid targets with a preplasma created by a long pulse laser

T. Yabuuchi, B. S. Paradkar, M. S. Wei, J. A. King, F. N. Beg, R. B. Stephens, N. Nakanii, M. Hatakeyama, H. Habara, K. Mima, K. A. Tanaka, J. T. Larsen
Journal: Physics of Plasmas
Phys. Plasmas 17, 060704 (2010)
https://doi.org/10.1063/1.3447878
Published: June 2010
View article titled, Transport study of intense-laser-produced fast electrons in solid targets with a preplasma created by a long pulse laser
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