Publications (47)
Exotic attractors of the non-equilibrium Rabi-Hubbard model
M. Schiró, C. Joshi, M. Bordyuh +3
We explore the phase diagram of the dissipative Rabi-Hubbard model, as could be realized by a Raman-pumping scheme applied to a coupled cavity array. There exist various exotic att…
High-power, mid-infrared, picosecond pulses generated by compression of a CO2 laser beat-wave in GaAs
J. J. Pigeon, S. Ya. Tochitsky, C. Joshi
We report on the generation of a train of ~ 2 ps, 10 um laser pulses via multiple four-wave mixing and compression of an infrared laser beat-wave propagating in the negative group…
Chromospheric plasma ejection above a pore
L. Bharti, B. Shobha, C. Quintero Noda +2
We present high spatial resolution observations of short lived transients, ribbon and jets like events above a pore in Ca II H images where fine structure like umbral dots, lightbr…
Phase Space Dynamics of Ionization Injection in Plasma Based Accelerators
X. L. Xu, J. F. Hua, F. Li +11
The evolution of beam phase space in ionization-induced injection into plasma wakefields is studied using theory and particle-in-cell (PIC) simulations. The injection process cause…
Quantum computation of molecular geometry via many-body nuclear spin echoes
C. Zhang, R. G. Cortiñas, A. H. Karamlou +320
Quantum-information-inspired experiments in nuclear magnetic resonance spectroscopy may yield a pathway towards determining molecular structure and properties that are otherwise ch…
Physical mechanism of the transverse instability in radiation pressure ion acceleration
Y. Wan, C. -H. Pai, C. J. Zhang +8
The transverse stability of the target is crucial for obtaining high quality ion beams using the laser radiation pressure acceleration (RPA) mechanism. In this letter, a theoretica…
Commissioning and first measurements of the initial X-ray and γ-ray detectors at FACET-II
P. San Miguel Claveria, D. Storey, G. J. Cao +21
The upgraded Facility for Advanced Accelerator Experimental Tests (FACET-II) at SLAC National Accelerator Laboratory has been designed to deliver ultra-relativistic electron and po…
Generating multi-GeV electron bunches using single stage laser wakefield acceleration in a 3D nonlinear regime
W. Lu, M. Tzoufras, C. Joshi +5
The extraordinary ability of space-charge waves in plasmas to accelerate charged particles at gradients that are orders of magnitude greater than in current accelerators has been w…
First results from the E302 efficiency$\unicode{x2013}$instability experiment at the FACET-II facility
O. G. Finnerud, E. Adli, R. Ariniello +18
The beam-breakup (BBU) instability in plasma accelerators is seeded by a transverse offset between the driver and a trailing bunch. The BBU instability induces oscillations in the…
Observation of breakdown wave mechanism in avalanche ionization produced atmospheric plasma generated by a picosecond CO laser
E. Welch, D. Matteo, S. Tochitsky +2
Understanding the formation and long-timescale evolution of atmospheric plasmas produced by ultrashort, long wavelength IR (LWIR) pulses is an important but partially understood pr…
Laser-driven shock acceleration of monoenergetic ion beams
F. Fiuza, A. Stockem, E. Boella +7
We show that monoenergetic ion beams can be accelerated by moderate Mach number collisionless, electrostatic shocks propagating in a long scale-length exponentially decaying plasma…
Measurement of transverse wakefields induced by a misaligned positron bunch in a hollow channel plasma accelerator
C. A. Lindstrøm, E. Adli, J. M. Allen +18
Hollow channel plasma wakefield acceleration is a proposed method to provide high acceleration gradients for electrons and positrons alike: a key to future lepton colliders. Howeve…
Staged laser acceleration of high quality protons from a tailored plasma
Y. Wan, I. A. Andriyash, J. F. Hua +5
A new scheme of proton acceleration from a laser-driven near-critical-density plasma is proposed. Plasma with a tailored density profile allows a two-stage acceleration of protons.…
Colliding ionization injection in a beam driven plasma accelerator
Y. Wan, C. J. Zhang, F. Li +7
The proposal of generating high quality electron bunches via ionization injection triggered by an counter propagating laser pulse inside a beam driven plasma wake is examined via t…
Sub-femtosecond electron bunches created by direct laser acceleration in a laser wakefield accelerator with ionization injection
N. Lemos, J. L. Shaw, K. A. Marsh +1
In this work, we will show through three-dimensional particle-in-cell simulations that direct laser acceleration in laser a wakefield accelerator can generate sub-femtosecond elect…
Linear colliders based on laser-plasma accelerators
C. Benedetti, S. S. Bulanov, E. Esarey +40
White paper to the Proceedings of the U.S. Particle Physics Community Planning Exercise (Snowmass 2021): Linear colliders based on laser-plasma accelerators
Spatiotemporal dynamics of ultrarelativistic beam-plasma instabilities
P. San Miguel Claveria, X. Davoine, J. R. Peterson +28
An electron or electron-positron beam streaming through a plasma is notoriously prone to micro-instabilities. For a dilute ultrarelativistic infinite beam, the dominant instability…
Conservation of angular momentum in second harmonic generation from under-dense plasmas
C. K. Huang, C. J. Zhang, Z. Nie +3
Spin and orbital angular momentum of an optical beam are two independent parameters that exhibit distinct effects on mechanical objects. However, when laser beams with angular mome…
Evidence for high-energy and low-emittance electron beams using ionization injection of charge in a plasma wakefield accelerator
N. Vafaei-Najafabadi, W. An, C. E. Clayton +15
Ionization injection in a plasma wakefield accelerator was investigated experimentally using two lithium plasma sources of different lengths. The ionization of the helium gas, used…
Collisionless shock acceleration of narrow energy spread ion beams from mixed species plasmas using 1 m lasers
A. Pak, S. Kerr, N. Lemos +15
Collisionless shock acceleration of protons and C ions has been achieved by the interaction of a 10 W/cm, 1 m laser with a near-critical density plasma. Ablat…
High quality electron bunch generation using a longitudinal density-tailored plasma-based accelerator in the three-dimensional blowout regime
X. L. Xu, F. Li, W. An +4
The generation of very high quality electron bunches (high brightness and low energy spread) from a plasma-based accelerator in the three-dimensional blowout regime using self-inje…
Laser-driven Collisionless Shock Acceleration of Ions from Near-critical plasmas
S. Tochitsky, A. Pak, F. Fiuza +5
This paper overviews experimental and numerical results on acceleration of narrow energy spread ion beams by an electrostatic collisionless shockwave driven by 1 um (Omega EP) and…
Approaching Petavolts per meter plasmonics using structured semiconductors
Aakash A. Sahai, M. Golkowski, T. Katsouleas +6
A new class of strongly excited plasmonic modes that open access to unprecedented Petavolts per meter electromagnetic fields promise wide-ranging, transformative impact. These mode…
Femtosecond probing of light-speed plasma wakefields by using a relativistic electron bunch
C. J. Zhang, J. F. Hua, Y. Wan +11
Relativistic wakes produced by intense laser or particle beams propagating through plasmas are being considered as accelerators for next generation of colliders and coherent light…
Snowmass 2013 Computing Frontier: Accelerator Science
P. Spentzouris, E. Cormier-Michel, C. Joshi +24
This is the working summary of the Accelerator Science working group of the Computing Frontier of the Snowmass meeting 2013. It summarizes the computing requirements to support acc…
A near-ideal dechirper for plasma-based electron and positron acceleration using a hollow channel plasma
Y. P. Wu, J. F. Hua, C. H. Pai +15
Plasma-based electron and positron wakefield acceleration has made great strides in the past decade. However one major challenge for its applications to coherent light sources and…
Estimation of direct laser acceleration in laser wakefield accelerators using particle-in-cell simulations
J. L. Shaw, N. Lemos, K. A. Marsh +3
Many current laser wakefield acceleration (LWFA) experiments are carried out in a regime where the laser pulse length is on the order of or longer than the wake wavelength and wher…
Exact phase space matching for staging plasma and traditional accelerator components using longitudinally tailored plasma profiles
X. L. Xu, Y. P. Wu, C. J. Zhang +10
Phase space matching between two plasma-accelerator (PA) stages and between a PA and a traditional accelerator component is a critical issue for emittance preservation of beams acc…
Low emittance electron beam generation from a laser wakefield accelerator using two laser pulses with different wavelengths
X. L. Xu, Y. P. Wu, C. J. Zhang +8
Ionization injection triggered by short wavelength laser pulses inside a nonlinear wakefield driven by a longer wavelength laser is examined via multi-dimensional particle-in-cell…
Generation of High Brightness Electron Beams via Ionization Induced Injection by Transverse Colliding Lasers in a Beam-Driven Plasma Wakefield Accelerator
F. Li, J. F. Hua, X. L. Xu +10
The production of ultra-bright electron bunches using ionization injection triggered by two transversely colliding laser pulses inside a beam-driven plasma wake is examined via thr…
Satisfying the Direct Laser Acceleration Resonance Condition in a Laser Wakefield Accelerator
J. L. Shaw, N. Vafaei-Najafabadi, K. A. Marsh +4
In this proceeding, we show that when the drive laser pulse overlaps the trapped electrons in a laser wakefield accelerator (LWFA), those electrons can gain energy from direct lase…
Quantum entanglement of nanocantilevers
C. Joshi, A. Hutter, F. E. Zimmer +3
We propose a scheme to entangle two mechanical nanocantilevers through indirect interactions mediated by a gas of ultra cold atoms. We envisage a system of nanocantilevers magnetic…
Planning the Future of U.S. Particle Physics (Snowmass 2013): Chapter 9: Computing
L. A. T. Bauerdick, S. Gottlieb, G. Bell +28
These reports present the results of the 2013 Community Summer Study of the APS Division of Particles and Fields ("Snowmass 2013") on the future program of particle physics in the…
High-brilliance synchrotron radiation induced by the plasma magnetostatic mode
F. Fiuza, L. O. Silva, C. Joshi
Using multi-dimensional PIC simulations we show that the magnetic undulator-type field of the plasma magnetostatic mode is indeed produced by the interaction of a laser pulse with…
Phase space dynamics of a plasma wakefield dechirper for energy spread reduction
Y. P. Wu, J. F. Hua, Z. Zhou +12
Plasma-based accelerators have made impressive progress in recent years. However, the beam energy spread obtained in these accelerators is still at ~ 1 % level, nearly one order of…
Capturing relativistic wake eld structures in plasmas using ultrashort high-energy electrons as a probe
C. J. Zhang, J. F. Hua, X. L. Xu +8
A new method capable of capturing coherent electric field structures propagating at nearly the speed of light in plasma with a time resolution as small as a few femtoseconds is pro…
Generation of Low Absolute Energy Spread Electron Beams in Laser Wakefield Acceleration Using Tightly Focused Laser through Near-Ionization-Threshold Injection
F. Li, C. J. Zhang, Y. Wan +6
An enhanced ionization injection scheme using a tightly focused laser pulse with intensity near the ionization potential to trigger the injection process in a mismatched pre-plasma…
Ion acceleration with an ultra-intense two-frequency laser tweezer
Y. Wan, I. A. Andriyash, C. -H. Pai +9
Ultra-intense lasers produce and manipulate plasmas, allowing to locally generate extremely high static and electromagnetic fields. This Letter presents a concept of an ultra-inten…
Inclusive Production for Li+V System
C. Joshi, H. Kumawat, V. V. Parkar +6
Measurement of angular distributions and energy spectra of and deuterons through breakup, transfer and incomplete fusion processes to dis-entangle their relative contributions…
Self-modulated laser wakefield accelerators as x-ray sources
N. Lemos, J. L. Martins, F. S. Tsung +5
The development of a directional, small-divergence, and short-duration picosecond x-ray probe beam with an energy greater than 50 keV is desirable for high energy density science e…
Predominant Contribution of Direct Laser Acceleration to High-Energy Electron Spectra in a Low-Density Self-Modulated Laser Wakefield Accelerator
P. M. King, K. Miller, N. Lemos +12
The two-temperature relativistic electron spectrum from a low-density (~cm) self-modulated laser wakefield accelerator (SM-LWFA) is observed to transition be…
Initializing anisotropic and unstable electron velocity distributions needed for investigating plasma kinetic instabilities
C. K. Huang, C. J. Zhang, K. A. Marsh +2
Plasmas with anisotropic electron velocity distribution functions are needed for the controlled study of kinetic plasma instabilities in the laboratory. We demonstrate that such pl…
Temporal characterization of ultrashort linearly chirped electron bunches generated from a laser wakefield accelerator
C. J. Zhang, J. F. Hua, Y. Wan +10
A new method for diagnosing the temporal characteristics of ultrashort electron bunches with linear energy chirp generated from a laser wakefield accelerator is described. When the…
Phonon-induced dephasing in quantum dot-cavity QED: Limitations of the polaron master equation
A. Morreau, C. Joshi, E. A. Muljarov
A semiconductor quantum dot (QD) embedded within an optical microcavity is a system of fundamental importance within quantum information processing. The optimization of quantum coh…
Nano-scale electron bunching in laser-triggered ionization injection in plasma accelerators
X. L. Xu, C. J. Zhang, F. Li +9
Ionization injection is attractive as a controllable injection scheme for generating high quality electron beams using plasma-based wakefield acceleration. Due to the phase depende…
Wakefield Generation in Hydrogen and Lithium Plasmas at FACET-II: Diagnostics and First Beam-Plasma Interaction Results
D. Storey, C. Zhang, P. San Miguel Claveria +28
Plasma Wakefield Acceleration (PWFA) provides ultrahigh acceleration gradients of 10s of GeV/m, providing a novel path towards efficient, compact, TeV-scale linear colliders and hi…
Ion acceleration from laser-driven electrostatic shocks
F. Fiuza, A. Stockem, E. Boella +6
Multi-dimensional particle-in-cell simulations are used to study the generation of electrostatic shocks in plasma and the reflection of background ions to produce high-quality and…