37 citations · 199 across the 17 of their papers we have counts for
18 papers
Progress in relativistic laser-plasma interaction with kilotesla-level applied magnetic fields
K. Weichman, A. P. L. Robinson, M. Murakami +5
We report on progress in the understanding of the effects of kilotesla-level applied magnetic fields on relativistic laser-plasma interactions. Ongoing advances in magnetic-field-g…
Coherence and superradiance from a plasma-based quasiparticle accelerator
B. Malaca, M. Pardal, D. Ramsey +7
Coherent light sources, such as free electron lasers, provide bright beams for biology, chemistry, physics, and advanced technological applications. Increasing the brightness of th…
Exact solutions for the electromagnetic fields of a flying focus
D. Ramsey, A. Di Piazza, M. Formanek +10
The intensity peak of a "flying focus" travels at a programmable velocity over many Rayleigh ranges while maintaining a near-constant profile. Assessing the extent to which these f…
Arbitrarily Structured Laser Pulses
Jacob R. Pierce, John P. Palastro, Fei Li +5
Spatiotemporal control refers to a class of optical techniques for structuring a laser pulse with coupled space-time dependent properties, including moving focal points, dynamic sp…
Underdense relativistically thermal plasma produced by magnetically assisted direct laser acceleration
K. Weichman, J. P. Palastro, A. P. L. Robinson +1
We introduce the first approach to volumetrically generate relativistically thermal plasma at gas-jet--accessible density. Using fully kinetic simulations and theory, we demonstrat…
Spatiotemporal control of laser intensity through cross-phase modulation
Tanner T. Simpson, Dillon Ramsey, Phil Franke +5
Spatiotemporal pulse shaping provides control over the trajectory and range of an intensity peak. While this control can enhance laser-based applications, the optical configuration…
Faraday rotation study of plasma bubbles in GeV wakefield accelerators
Y. Y. Chang, X. Cheng, A. Hannasch +8
We visualize plasma bubbles driven by 0.67 PW laser pulses in plasma of density by imaging Faraday rotation patterns imprinted on linea…
Nonlinear Thomson scattering with ponderomotive control
D. Ramsey, B. Malaca, A. Di Piazza +7
In nonlinear Thomson scattering, a relativistic electron reflects and re-radiates the photons of a laser pulse, converting optical light to x rays or beyond. While this extreme fre…
Towards the Optimisation of Direct Laser Acceleration
A. E. Hussein, A. V. Arefiev, T. Batson +13
Experimental measurements using the OMEGA EP laser facility demonstrated direct laser acceleration (DLA) of electron beams to (505 75) MeV with (140 30)~nC of charge fr…
Sign reversal in magnetic field amplification by relativistic laser-driven microtube implosions
K. Weichman, M. Murakami, A. P. L. Robinson +1
We demonstrate and explain the surprising phenomenon of sign reversal in magnetic field amplification by the laser-driven implosion of a structured target. Relativistically intense…
Generation of megatesla magnetic fields by intense-laser-driven microtube implosions
M. Murakami, J. J. Honrubia, K. Weichman +2
A microtube implosion driven by ultraintense laser pulses is used to produce ultrahigh magnetic fields. Due to the laser-produced hot electrons with energies of mega-electron volts…
Emission of electromagnetic waves as a stopping mechanism for nonlinear collisionless ionization waves in a high- regime
Haotian Mao, Kathleen Weichman, Zheng Gong +3
A high energy density plasma embedded in a neutral gas is able to launch an outward-propagating nonlinear electrostatic ionization wave that traps energetic electrons. The trapping…
Strong surface magnetic field generation in relativistic short pulse laser-plasma interaction with an applied seed magnetic field
Kathleen Weichman, Alexander P. L. Robinson, Masakatsu Murakami +1
While plasma often behaves diamagnetically, we demonstrate that the laser irradiation of a thin opaque target with an embedded target-transverse seed magnetic field $B_\mathrm{seed…
Magnetic field amplification in a laser-irradiated thin foil by return current electrons carrying orbital angular momentum
Y. Shi, K. Weichman, R. J. Kingham +1
Magnetized high energy density physics offers new opportunities for observing magnetic field-related physics for the first time in the laser-plasma context. We focus on one such ph…
Extreme Nonlinear Dynamics in Vacuum Laser Acceleration with a Crossed Beam Configuration
Alexander P. L. Robinson, Kavin Tangtartharakul, Kathleen Weichman +1
A relatively simple model problem where a single electron moves in two relativistically-strong obliquely intersecting plane wave-packets is studied using a number of different nume…
Laser reflection as a catalyst for direct laser acceleration in multipicosecond laser-plasma interaction
Kathleen Weichman, Alexander P. L. Robinson, Farhat N. Beg +1
We demonstrate that laser reflection acts as a catalyst for superponderomotive electron production in the preplasma formed by relativistic multipicosecond lasers incident on solid…
Observation of Plasma Bubble Structures in a GeV Laser-Plasma Accelerator
Yen-Yu Chang, Kathleen Weichman, Xiantao Cheng +8
We measure characteristics of plasma bubbles in GeV-class laser-plasma accelerators (LPAs) using Faraday rotation diagnostics. We extend these techniques, previously demonstrated f…
Bright 5 - 85 MeV Compton gamma-ray pulses from GeV laser-plasma accelerator and plasma mirror
J. M. Shaw, A. C. Bernstein, R. Zgadzaj +19
We convert a GeV laser-plasma electron accelerator into a compact femtosecond-pulsed -ray source by inserting a m-thick glass plate cm after the accelerator exit.…