N. Lemos, P. M. King, D. Rusby, I. Pagano, M. Sinclair, K. A. Marsh, J. L. Shaw, A. L. Milder, A. Pak, B. B. Pollock, M. Aufderheide, F. V. Hartemann, S. Q. Wu, Y. Hwang, B. M. Hegelich, J. Moody, P. Michel, C. Joshi, and F. Albert
Phys. Rev. Research 6, L032022 (2024) – Published 26 July 2024
The generation of x-ray beams in the energy range from keV to MeV is an active research area, essential to the study of high-energy-density matter, to improve the understanding of inertial confinement fusion and astrophysical systems. An ultrabroad-band x-ray source, with photon energies from 10 keV to >1 MeV, based on a picosecond laser-driven plasma accelerator, is characterized and used to radiograph a gold half hohlraum with a high-density sphere inside with relevant characteristics for high-energy-density science and inertial confinement fusion.
E. G. Gelfer, A. M. Fedotov, O. Klimo, and S. Weber
Phys. Rev. Research 6, L032013 (2024) – Published 15 July 2024
Coherent emission of a cold relativistic electron bunch passing through a counterpropagating strong laser pulse substantially modifies the radiation spectrum and enhances its low-frequency part by orders of magnitude. The derived analytical estimates are confirmed by 3D particle-in-cell simulations.
M. Tosca, A. Morace, M. Schollmeier, S. Steinke, V. Shirvanyan, Y. Arikawa, L. Giuffrida, D. Margarone, P. Pleskunov, A. Choukourov, R. R. Whitney, L. R. Scammell, and G. Korn
Phys. Rev. Research 6, 023326 (2024) – Published 25 June 2024
Dian Weerakonda, Anthony Dennis, Marco Calvi, and John Durrell
Phys. Rev. Research 6, L022060 (2024) – Published 11 June 2024
A concept for a staggered array undulator that can be constructed using bulk high-temperature superconductors and magnetized with pulsed field magnetization.
Phys. Rev. Research 6, L022052 (2024) – Published 4 June 2024
Can the strengths of the two leading magnetic confinement concepts, tokamaks and stellarators, be merged into one single flexible device? As a possible answer to this question, we propose a first-of-its kind optimized stellarator-tokamak hybrid. This hybrid requires only a single type of stellarator coil in addition to the tokamak coils; it has sufficient particle confinement, and it reduces the needed plasma current, which can be a driver for unwanted instabilities.
H. Poole, M. K. Ginnane, M. Millot, H. M. Bellenbaum, G. W. Collins, S. X. Hu, D. Polsin, R. Saha, J. Topp-Mugglestone, T. G. White, D. A. Chapman, J. R. Rygg, S. P. Regan, and G. Gregori
Phys. Rev. Research 6, 023144 (2024) – Published 8 May 2024
Phys. Rev. Research 6, L022029 (2024) – Published 2 May 2024
By employing high-resolution x-ray scattering techniques, the sound speed of methane under high-temperature and pressure conditions is determined, thereby demonstrating consistency with Birch’s law in this new parameter regime.
Ludovic Rapp, Takeshi Matsuoka, Konstantin L. Firestein, Daisuke Sagae, Hideaki Habara, Keiichiro Mukai, Kazuo A. Tanaka, Eugene G. Gamaly, Ryosuke Kodama, Yusuke Seto, Takahisa Shobu, Aki Tominaga, Lachlan Smillie, Tatiana Pikuz, Bianca Haberl, Toshinori Yabuuchi, Tadashi Togashi, Yuichi Inubushi, Makina Yabashi, Saulius Juodkazis, Dmitri V. Golberg, Andrei V. Rode, and Norimasa Ozaki
Phys. Rev. Research 6, 023101 (2024) – Published 29 April 2024
A. J. Ross, J. Chappell, J. J. van de Wetering, J. Cowley, E. Archer, N. Bourgeois, L. Corner, D. R. Emerson, L. Feder, X. J. Gu, O. Jakobsson, H. Jones, A. Picksley, L. Reid, W. Wang, R. Walczak, and S. M. Hooker
Phys. Rev. Research 6, L022001 (2024) – Published 3 April 2024
A train of laser pulses guided by a 100-mm-long, all-optical plasma channel resonantly excites a large amplitude plasma wave. Pulse trains of a similar kind could be generated by joule-scale thin-disk lasers, offering a route to driving GeV-scale plasma accelerators at kilohertz pulse repetition rates.
S. J. Liu, D. Wu, T. X. Hu, T. Y. Liang, X. C. Ning, J. H. Liang, Y. C. Liu, P. Liu, X. Liu, Z. M. Sheng, Y. T. Zhao, D. H. H. Hoffmann, X. T. He, and J. Zhang
Phys. Rev. Research 6, 013323 (2024) – Published 25 March 2024
W. Z. Zhang, H. S. Fu, J. B. Cao, Z. Wang, W. D. Fu, Y. Y. Liu, and Y. Yu
Phys. Rev. Research 6, L012047 (2024) – Published 1 March 2024
The dispersion relation of whistler waves in superhot ( > 5 keV) plasmas is experimentally determined. Good agreement between experiment and kinetic theory unmasks the characteristics of whistler waves at elevated temperatures and exhibits the evolution of their group velocity dispersion from positive to negative.
