Generation of femtosecond electron bunches and hard x-rays by ultra-intense laser wake field acceleration in a gas jet

2004 ◽  
Author(s):  
M. Uesaka ◽  
T. Hosokai ◽  
K. Kinoshita ◽  
A. Zhidkov
Keyword(s):  
Intense Laser ◽  
Gas Jet ◽  
X Rays ◽  
Wake Field ◽  
Electron Bunches ◽  
Femtosecond Electron Bunches

Radiation Production Using Femtosecond Electron Bunches

2005 ◽  
Vol 107 ◽  
pp. 11-14
Author(s):  
C. Thongbai ◽  
V. Jinamoon ◽  
N. Kangrang ◽  
K. Kusoljariyakul ◽  
S. Rimjaem ◽  
...  
Keyword(s):  
Far Infrared ◽  
Bunch Length ◽  
X Rays ◽  
Research Facility ◽  
X Ray ◽  
Electron Bunches ◽  
Rf Gun ◽  
Intense Radiation ◽  
Far Infrared Radiation ◽  
Femtosecond Electron Bunches

Femtosecond electron bunches can be generated from a system consisting of an RF gun with a thermionic cathode, an alpha magnet, and a linear accelerator and can be used to produce femtosecond (fs) electromagnetic radiation pulses. At the Fast Neutron Research Facility (FNRF), Thailand, we are especially interested in production in Far-infrared (FIR) and x-radiation. In the far-infrared, radiation is emitted coherently for wavelengths which are longer than the electron bunch length, yielding intense radiation. Although, the x-rays emitted are incoherent, its femtosecond time scale is crucial for development of a femtosecond x-ray source.

High resolution electron beam measurements on the ALPHA-X laser–plasma wakefield accelerator

2012 ◽  
Vol 78 (4) ◽  
pp. 393-399 ◽  
Author(s):  
G. H. WELSH ◽  
S. M. WIGGINS ◽  
R. C. ISSAC ◽  
E. BRUNETTI ◽  
G. G. MANAHAN ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Resolution ◽  
Laser Plasma ◽  
Electron Bunch ◽  
High Energy ◽  
Energy Spread ◽  
Gas Jet ◽  
X Rays ◽  
Electron Bunches ◽  
Wakefield Accelerator

AbstractThe Advanced Laser–Plasma High-Energy Accelerators towards X-rays (ALPHA-X) programme at the University of Strathclyde is developing laser–plasma accelerators for the production of ultra-short high quality electron bunches. Focussing such LWFA bunches into an undulator, for example, requires particular attention to be paid to the emittance, electron bunch duration and energy spread. On the ALPHA-X wakefield accelerator beam line, a high intensity ultra-short pulse from a 30 TW Ti:Sapphire laser is focussed into a helium gas jet to produce femtosecond duration electron bunches in the range of 90–220 MeV. Measurements of the electron energy spectrum, obtained using a high resolution magnetic dipole spectrometer, show electron bunch r.m.s. energy spreads down to 0.5%. A pepper-pot mask is used to obtain transverse emittance measurements of a 128 ± 3 MeV mono-energetic electron beam. An average normalized emittance of ϵrms,x,y = 2.2 ± 0.7, 2.3 ± 0.6 π-mm-mrad is measured, which is comparable to that of a conventional radio-frequency accelerator. The best measured emittance of ϵrms,x, = 1.1 ± 0.1 π-mm-mrad corresponds to the resolution limit of the detection system. 3D particle-in-cell simulations of the ALPHA-X accelerator partially replicate the generation of low emittance, low energy spread bunches with charge less than 4 pC and gas flow simulations indicate both long density ramps and shock formation in the gas jet nozzle.

scholarly journals Concept of generation of extremely compressed high-energy electron bunches in several interfering intense laser pulses with tilted amplitude fronts

2012 ◽  
Vol 31 (1) ◽  
pp. 23-28 ◽  
Author(s):  
V.V. Korobkin ◽  
M.Yu. Romanovskiy ◽  
V.A. Trofimov ◽  
O.B. Shiryaev
Keyword(s):  
Laser Pulses ◽  
High Energy ◽  
Intense Laser ◽  
High Energy Electron ◽  
Speed Of Light ◽  
Electron Bunches ◽  
Newton Equation ◽  
High Energies ◽  
Neutral Gas ◽  
Intense Laser Pulses

AbstractA new concept of generating tight bunches of electrons accelerated to high energies is proposed. The electrons are born via ionization of a low-density neutral gas by laser radiation, and the concept is based on the electrons acceleration in traps arising within the pattern of interference of several relativistically intense laser pulses with amplitude fronts tilted relative to their phase fronts. The traps move with the speed of light and (1) collect electrons; (2) compress them to extremely high density in all dimensions, forming electron bunches; and (3) accelerate the resulting bunches to energies of at least several GeV per electron. The simulations of bunch formation employ the Newton equation with the corresponding Lorentz force.

Production and Use of Femtosecond Electron Bunches

2002 ◽  
pp. 321-329
Author(s):  
R. Farias ◽  
S. Rimjaem ◽  
C. Settakorn ◽  
T. Vilaithong ◽  
H. Wiedemann
Keyword(s):  
Electron Bunches ◽  
Femtosecond Electron Bunches

scholarly journals Single-shot electrons and protons time-resolved detection from high-intensity laser–solid matter interactions at SPARC_LAB

2019 ◽  
Vol 7 ◽  
Author(s):  
F. Bisesto ◽  
M. Galletti ◽  
M. P. Anania ◽  
M. Ferrario ◽  
R. Pompili ◽  
...  
Keyword(s):  
Intense Laser ◽  
Test Facility ◽  
Particle Accelerators ◽  
Single Shot ◽  
X Rays ◽  
Time Resolved ◽  
Laser Plasma Interactions ◽  
High Intensity Laser ◽  
Set Up ◽  
Intensity Laser

Laser–plasma interactions have been studied in detail over the past twenty years, as they show great potential for the next generation of particle accelerators. The interaction between an ultra-intense laser and a solid-state target produces a huge amount of particles: electrons and photons (X-rays and $\unicode[STIX]{x03B3}$ -rays) at early stages of the process, with protons and ions following them. At SPARC_LAB Test Facility we have set up two diagnostic lines to perform simultaneous temporally resolved measurements on both electrons and protons.

scholarly journals Coupling Effects in Multistage Laser Wake-field Acceleration of Electrons

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Zhan Jin ◽  
Hirotaka Nakamura ◽  
Naveen Pathak ◽  
Yasuo Sakai ◽  
Alexei Zhidkov ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Electron Beams ◽  
High Energy ◽  
Long Distance ◽  
Plasma Cathode ◽  
Particle In Cell ◽  
Wake Field ◽  
Spatial Coupling ◽  
Electron Bunches ◽  
A Charge

AbstractStaging laser wake-field acceleration is considered to be a necessary technique for developing full-optical jitter-free high energy electron accelerators. Splitting of the acceleration length into several technical parts and with independent laser drivers allows not only the generation of stable, reproducible acceleration fields but also overcoming the dephasing length while maintaining an overall high acceleration gradient and a compact footprint. Temporal and spatial coupling of pre-accelerated electron bunches for their injection in the acceleration phase of a successive laser pulse wake field is the key part of the staging laser-driven acceleration. Here, characterization of the coupling is performed with a dense, stable, narrow energy band of <3% and energy-selectable electron beams with a charge of ~1.6 pC and energy of ~10 MeV generated from a laser plasma cathode. Cumulative focusing of electron bunches in a low-density preplasma, exhibiting the Budker–Bennett effect, is shown to result in the efficient injection of electrons, even with a long distance between the injector and the booster in the laser pulse wake. The measured characteristics of electron beams modified by the booster wake field agree well with those obtained by multidimensional particle-in-cell simulations.

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