scholarly journals Demonstration of femtosecond broadband X-rays from laser wakefield acceleration as a source for pump-probe X-ray absorption studies

2020 ◽  
Vol 35 ◽  
pp. 100729
Author(s):  
K. Behm ◽  
A.E. Hussein ◽  
T.Z. Zhao ◽  
R.A. Baggott ◽  
J.M. Cole ◽  
...  
Keyword(s):  
X Rays ◽  
Laser Wakefield Acceleration ◽  
Pump Probe ◽  
X Ray ◽  
Wakefield Acceleration ◽  
Absorption Studies ◽  
Laser Wakefield ◽  
X Ray Absorption

Ultrahigh brightness attosecond electron beams from intense X-ray laser driven plasma photocathode

2019 ◽  
Vol 34 (34) ◽  
pp. 1943012 ◽  
Author(s):  
Ronghao Hu ◽  
Zheng Gong ◽  
Jinqing Yu ◽  
Yinren Shou ◽  
Meng Lv ◽  
...  
Keyword(s):  
Electron Beams ◽  
Laser Pulses ◽  
Laser Wakefield Acceleration ◽  
X Ray ◽  
Electron Sources ◽  
Research Areas ◽  
Wakefield Acceleration ◽  
Laser Wakefield ◽  
Liquid Methane ◽  
Present Simulation

The emerging intense attosecond X-ray lasers can extend the Laser Wakefield Acceleration mechanism to higher plasma densities in which the acceleration gradients are greatly enhanced. Here we present simulation results of high quality electron acceleration driven by intense attosecond X-ray laser pulses in liquid methane. Ultrahigh brightness electron beams can be generated with 5-dimensional beam brightness over [Formula: see text]. The pulse duration of the electron bunch can be shorter than 20 as. Such unique electron sources can benefit research areas requiring crucial spatial and temporal resolutions.

Diagnosis of bubble evolution in laser-wakefield acceleration via angular distributions of betatron x-rays

2014 ◽  
Vol 105 (16) ◽  
pp. 161110 ◽  
Author(s):  
Y. Ma ◽  
L. M. Chen ◽  
N. A. M. Hafz ◽  
D. Z. Li ◽  
K. Huang ◽  
...  
Keyword(s):  
Angular Distributions ◽  
X Rays ◽  
Laser Wakefield Acceleration ◽  
Wakefield Acceleration ◽  
Laser Wakefield ◽  
Bubble Evolution

scholarly journals Improvement of Properties of Self-Injected and Accelerated Electron Bunch by Laser Pulse in Plasma, Using Pulse Precursor

2019 ◽  
Keyword(s):  
Laser Pulse ◽  
Laser Plasma ◽  
Electron Bunch ◽  
Energy Spread ◽  
Intense Laser ◽  
X Rays ◽  
Laser Wakefield Acceleration ◽  
Small Energy ◽  
Wakefield Acceleration ◽  
Laser Wakefield

The accelerating gradients in conventional linear accelerators are currently limited to ~100 MV/m. Plasma-based accelerators have the ability to sustain accelerating gradients which are several orders of magnitude greater than that obtained in conventional accelerators. Due to the rapid development of laser technology the laser-plasma-based accelerators are of great interest now. Over the past decade, successful experiments on laser wakefield acceleration of electrons in the plasma have confirmed the relevance of this acceleration. Evidently, the large accelerating gradients in the laser plasma accelerators allow to reduce the size and to cut the cost of accelerators. Another important advantage of the laser-plasma accelerators is that they can produce short electron bunches with high energy. The formation of electron bunches with small energy spread was demonstrated at intense laser–plasma interactions. Electron self-injection in the wake-bubble, generated by an intense laser pulse in underdense plasma, has been studied. With newly available compact laser technology one can produce 100 PW-class laser pulses with a single-cycle duration on the femtosecond timescale. With a fs intense laser one can produce a coherent X-ray pulse. Prof. T. Tajima suggested utilizing these coherent X-rays to drive the acceleration of particles. When such X-rays are injected into a crystal they interact with a metallic-density electron plasma and ideally suit for laser wakefield acceleration. In numerical simulation of authors, performed according to idea of Prof. T.Tajima, on wakefield excitation by a X-ray laser pulse in a metallic-density electron plasma the accelerating gradient of several TV/m has been obtained. It is important to form bunch with small energy spread and small size. The purpose of this paper is to show by the numerical simulation that some precursor-laser-pulse, moved before the main laser pulse, controls properties of the self-injected electron bunch and provides at certain conditions small energy spread and small size of self-injected and accelerated electron bunch.

scholarly journals X-rays only when you want them: optimized pump–probe experiments using pseudo-single-bunch operation

2015 ◽  
Vol 22 (3) ◽  
pp. 729-735 ◽  
Author(s):  
M. P. Hertlein ◽  
A. Scholl ◽  
A. A. Cordones ◽  
J. H. Lee ◽  
K. Engelhorn ◽  
...  
Keyword(s):  
Laser Excitation ◽  
Ccd Camera ◽  
Single Shot ◽  
X Rays ◽  
Time Resolved ◽  
Pump Probe ◽  
Charge Coupled Device ◽  
X Ray ◽  
X Ray Absorption ◽  
Sample Damage

Laser pump–X-ray probe experiments require control over the X-ray pulse pattern and timing. Here, the first use of pseudo-single-bunch mode at the Advanced Light Source in picosecond time-resolved X-ray absorption experiments on solutions and solids is reported. In this mode the X-ray repetition rate is fully adjustable from single shot to 500 kHz, allowing it to be matched to typical laser excitation pulse rates. Suppressing undesired X-ray pulses considerably reduces detector noise and improves signal to noise in time-resolved experiments. In addition, dose-induced sample damage is considerably reduced, easing experimental setup and allowing the investigation of less robust samples. Single-shot X-ray exposures of a streak camera detector using a conventional non-gated charge-coupled device (CCD) camera are also demonstrated.

scholarly journals X-ray analysis methods for sources from self-modulated laser wakefield acceleration driven by picosecond lasers

2019 ◽  
Vol 90 (3) ◽  
pp. 033503 ◽  
Author(s):  
P. M. King ◽  
N. Lemos ◽  
J. L. Shaw ◽  
A. L. Milder ◽  
K. A. Marsh ◽  
...  
Keyword(s):  
Laser Wakefield Acceleration ◽  
X Ray ◽  
Wakefield Acceleration ◽  
Analysis Methods ◽  
Laser Wakefield ◽  
Picosecond Lasers

scholarly journals Spectrum bandwidth narrowing of Thomson scattering X-rays with energy chirped electron beams from laser wakefield acceleration

2014 ◽  
Vol 104 (1) ◽  
pp. 013903 ◽  
Author(s):  
Tong Xu ◽  
Min Chen ◽  
Fei-Yu Li ◽  
Lu-Le Yu ◽  
Zheng-Ming Sheng ◽  
...  
Keyword(s):  
Electron Beams ◽  
Thomson Scattering ◽  
X Rays ◽  
Laser Wakefield Acceleration ◽  
Wakefield Acceleration ◽  
Laser Wakefield

Laser wakefield acceleration: application to Betatron x-ray radiation production and x-ray imaging

2012 ◽  
Author(s):  
S. Fourmaux ◽  
S. Corde ◽  
K. Ta Phuoc ◽  
P. Lassonde ◽  
S. Payeur ◽  
...  
Keyword(s):  
Laser Wakefield Acceleration ◽  
X Ray ◽  
Wakefield Acceleration ◽  
X Ray Imaging ◽  
Laser Wakefield
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