Coherent radiation sources based on laser driven plasma waves

Jaroszynski, D. A.; Ersfeld, Bernhard; Islam, M. R.; Brunetti, E.; Shanks, Richard; Grant, P.; Tooley, Matthew P.; Grant, D. W.; Gil, D. Reboredo; Lepipas, P.; McKendrick, Graeme; Cipiccia, Silvia; Wiggins, S. M.; Welsh, G. H.; Vieux, G.; Chen, S.; Aniculaesei, Constantin; Manahan, Grace; Anania, M. P.; Noble, Adam; Yoffe, Samuel R.; Raj, Gaurav; Subiel, Anna; Yang, Xue; Sheng, Zheng-Ming; Hidding, B.; Issac, R. C.; Cho, M-H.; Hur, Min Sup

doi:10.1109/irmmw-thz.2015.7327519

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…Electron beam energy spectra are measured using an imaging dipole magnet spectrometer and the beam is transported to an undulator using sets of quadrupole magnets. Beams with an emittance of 1 π mm mrad 17 , energies of 80-300 MeV 1,2,4,11 , and percent level energy spreads 2,4,18 , low divergences (0.5-2 mrad) 18 , peak currents >1 kA and fs bunch duration 5 have been measured on the ALPHA-X beamline ( Figure 2). Theoretical studies ( Figure 1) show that attosecond bunches can be produced by perturbing the plasma density to briefly trigger injection 6 .…”

Section: Lwfa Experimentsmentioning

confidence: 99%

Compact radiation sources based on laser-driven plasma waves

Jaroszynski

Amnania

Aniculaesei

et al. 2019

XXII International Symposium on High Power Laser Systems and Applications

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Here we explore ways of transforming laser radiation into incoherent and coherent electromagnetic radiation using laserdriven plasma waves. We present several examples based on the laser wakefield accelerator (LWFA) and show that the electron beam and radiation from the LWFA has several unique characteristics compared with conventional devices. We show that the energy spread can be much smaller than 1% at 130-150 MeV. This makes LWFAs useful tools for scientists undertaking time resolved probing of matter subject to stimuli. They also make excellent imaging tools. We present experimental evidence that ultra-short XUV pulses, as short as 30 fs, are produced directly from an undulator driven by a LWFA, due to the electron bunches having a duration of a few femtoseconds. By extending the electron energy to 1 GeV, and for 1-2 fs duration pulses of 2 nm radiation peak powers of several MW per pC can be produced. The increased charge at higher electron energies will increase the peak power to GW levels, making the LWFA driven synchrotron an extremely useful source with a spectral range extending into the water window. With the reduction in size afforded by using LWFA driven radiation sources, and with the predicted advances in laser stability and repletion rate, ultra-short pulse radiation sources should become more affordable and widely used, which could change the way science is done.

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Section: Lwfa Experimentsmentioning

confidence: 99%

Compact radiation sources based on laser-driven plasma waves

Jaroszynski

Amnania

Aniculaesei

et al. 2019

XXII International Symposium on High Power Laser Systems and Applications

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“…6 Only a small fraction of plasma electrons can be injected into the bubble and laser-wakefield accelerators typically produce beams with a small charge at pC level, which is desirable when high-quality beams with short bunch length, narrow energy spread and low emittance are required, for novel radiation sources. [7][8][9][10][11][12][13][14] There are, however, applications such as non-destructive-testing, ultra-fast studies in condensed matter, radiolysis, isotope production and radiotherapy that require high-charge, low-energy electron beams. [15][16][17][18][19] Ionization-assisted injection in high-Z or clustering gas targets has been explored to boost the charge to 100s pC at 10s-100s MeV energies.…”

Section: Introductionmentioning

confidence: 99%

Wide-angle electron beams from laser-wakefield accelerators

Brunetti

Yang

et al. 2017

Laser Acceleration of Electrons, Protons, and Ions IV

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Advances in laser technology have driven the development of laser-wakefield accelerators, compact devices that are capable of accelerating electrons to GeV energies over centimetre distances by exploiting the strong electric field gradients arising from the interaction of intense laser pulses with an underdense plasma. A side-effect of this acceleration mechanism is the production of high-charge, low-energy electron beams at wide angles. Here we present an experimental and numerical study of the properties of these wide-angle electron beams, and show that they carry off a significant fraction of the energy transferred from the laser to the plasma. These high-charge, wide-angle beams can also cause damage to laser-wakefield accelerators based on capillaries, as well as become source of unwanted bremsstrahlung radiation.

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