An ultrashort pulse ultra-violet radiation undulator source driven by a laser plasma wakefield accelerator

Abstract

Absolute charge calibration of scintillating screens for relativistic electron detection Review of Scientific Instruments 81, 033301 (2010);

Interferometry for full temporal reconstruction of laser-plasma accelerator-based seeded free electron lasers

“…undulator radiation [35][36][37][38], significative achievements in terms of electron beam transport and manipulation [39] turned a corner, allowing for control of the synchrotron radiation spectral properties [40]. LPA-based FEL amplification is now within reach at least in the visible or ultra-violet range.…”

Characterization of laser-driven single and double electron bunches with a permanent magnet quadrupole triplet and pepper-pot mask

“…A PMQ triplet is highly advantageous for LWFA beam lines because they are very compact yet capable of effectively transporting bunches with GeV-scale energy [22]. One has recently been implemented on our beam line for bunch propagation through an undulator as part of a programme to develop a vacuum ultra-violet FEL light source [7]. Similar work elsewhere in the extreme ultra-violet spectral range has employed a PMQ doublet [6].…”

“…Laser-wakefield accelerators (LWFAs) are table-top devices capable of delivering high quality electron beams with energies up to GeV levels by exploiting the large electric field gradients created when intense laser pulses interact with plasma [1]. The small size of the accelerator and the promising properties of electron beams make LWFAs attractive tools in many fields, including as potential drivers of a new generation of compact synchrotron-like [2][3][4] and freeelectron laser (FEL) [5][6][7] light sources. The requirement of such applications to transport beams over long distances with minimum degradation has prompted the development of beam lines and diagnostic systems tailored for laser-produced beams, which so far suffer from larger instabilities than conventional radio frequency (RF) accelerators.…”

“…The requirement of such applications to transport beams over long distances with minimum degradation has prompted the development of beam lines and diagnostic systems tailored for laser-produced beams, which so far suffer from larger instabilities than conventional radio frequency (RF) accelerators. To avoid electron beam blowup over long drift propagation, miniature permanent magnet quadrupole (PMQ) lenses are typically installed close to the accelerator [6,7]. These have very high magnetic field gradients (∼ 500 T m −1 ) for collimation and focusing of high energy beams over short distances.…”

Tunable X-ray source by Thomson scattering during laser-wakefield acceleration

“…Transition radiation can be used to generate THz signals [16], which can among others be used to characterize the bunch duration of the laser-accelerated electrons [17]. By sending few-hundred MeV electrons into a magnet undulator, synchrotron radiation in the ultraviolet regime [18,19] can be generated. Potentially, this technology can also be extended to generate bright, coherent radiation in a tabletop free-electron laser [20].…”