Intense High-Contrast Femtosecond<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>K</mml:mi></mml:math>-Shell X-Ray Source from Laser-Driven Ar Clusters

Chen, L.M.; Liu, F.; Wang, Weimin; Kando, M.; Mao, Junhong; Zhang, L.; Ma, Jing; Li, Y. T.; Bulanov, S. V.; Tajima, T.; Kato, Yoshiaki; Sheng, Zheng-Ming; Wei, Zhiyi; Zhang, J.

doi:10.1103/physrevlett.104.215004

Cited by 61 publications

(29 citation statements)

References 25 publications

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“…The measured conversion coefficient of laser energy to x-ray in spectral region >2.4 keV was around ε ∼10 . This result is close to data obtained with conical supersonic nozzles for Ar and Kr jets [10,11].…”

Section: Experimental Study Of X-ray Emission From Source With Ar/kr supporting

confidence: 90%

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Study of x-rays produced from debris-free sources with Ar, Kr and Kr/Ar mixture linear gas jets irradiated by UNR Leopard laser beam with fs and ns pulse duration

Kantsyrev

Schultz

Shlyaptseva

et al. 2016

High Energy Density Physics

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Section: Experimental Study Of X-ray Emission From Source With Ar/kr supporting

confidence: 90%

“…The harder x-ray emission is interconnecting with self-focusing processes [7]. Most of the early experiments on the investigation of ultra-short laser pulse interaction with cluster/ gas jet were performed with conical nozzles [8][9][10][11][12], but linear jets were not studied sufficiently yet [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Study of x-rays produced from debris-free sources with Ar, Kr and Kr/Ar mixture linear gas jets irradiated by UNR Leopard laser beam with fs and ns pulse duration

Kantsyrev

Schultz

Shlyaptseva

et al. 2016

High Energy Density Physics

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“…Recently with the development of ultrashort high power lasers, the laser-plasma X-rays are attracting increasing interest as compact and affordable sources with some unique features for many applications. Hard X-ray emission from femtosecond laser-produced plasmas has been extensively studied in the past years34567891011. The source energy conversion efficiency and temporal duration have been greatly improved67.…”

mentioning

confidence: 99%

“…Hard X-ray emission from femtosecond laser-produced plasmas has been extensively studied in the past years34567891011. The source energy conversion efficiency and temporal duration have been greatly improved67. However, most laser-driven hard X-ray sources are spatially symmetric, except for high harmonic generation8, Thomson scattering9 and betatron radiation3.…”

mentioning

confidence: 99%

Bright betatron X-ray radiation from a laser-driven-clustering gas target

Chen

Yan

et al. 2013

Sci Rep

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Hard X-ray sources from femtosecond (fs) laser-produced plasmas, including the betatron X-rays from laser wakefield-accelerated electrons, have compact sizes, fs pulse duration and fs pump-probe capability, making it promising for wide use in material and biological sciences. Currently the main problem with such betatron X-ray sources is the limited average flux even with ultra-intense laser pulses. Here, we report ultra-bright betatron X-rays can be generated using a clustering gas jet target irradiated with a small size laser, where a ten-fold enhancement of the X-ray yield is achieved compared to the results obtained using a gas target. We suggest the increased X-ray photon is due to the existence of clusters in the gas, which results in increased total electron charge trapped for acceleration and larger wiggling amplitudes during the acceleration. This observation opens a route to produce high betatron average flux using small but high repetition rate laser facilities for applications.

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“…Among several mechanisms to generate X-ray radiation from laser-plasma interactions (15)(16)(17)(18)(19)(20), betatron radiation is straightforward and able to deliver larger X-ray photon fluxes per shot [∼10 8 phs/shot (21)] and higher photon energies [up to gamma rays (22)]. The betatron oscillation frequency is given by ω β = ω p (2γ) −1/2 , where ω p is the plasma frequency and γ is the Lorentz factor of the accelerated electron beam.…”

mentioning

confidence: 99%

Concurrence of monoenergetic electron beams and bright X-rays from an evolving laser-plasma bubble

Yan

Chen

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

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Desktop laser plasma acceleration has proven to be able to generate gigaelectronvolt-level quasi-monoenergetic electron beams. Moreover, such electron beams can oscillate transversely (wiggling motion) in the laser-produced plasma bubble/channel and emit collimated ultrashort X-ray flashes known as betatron radiation with photon energy ranging from kiloelectronvolts to megaelectronvolts. This implies that usually one cannot obtain bright betatron X-rays and high-quality electron beams with low emittance and small energy spread simultaneously in the same accelerating wave bucket. Here, we report the first (to our knowledge) experimental observation of two distinct electron bunches in a single laser shot, one featured with quasi-monoenergetic spectrum and another with continuous spectrum along with large emittance. The latter is able to generate high-flux betatron X-rays. Such is observed only when the laser self-guiding is extended over 4 mm at a fixed plasma density (4 × 10 18 cm −3 ). Numerical simulation reveals that two bunches of electrons are injected at different stages due to the bubble evolution. The first bunch is injected at the beginning to form a stable quasi-monoenergetic electron beam, whereas the second one is injected later due to the oscillation of the bubble size as a result of the change of the laser spot size during the propagation. Due to the inherent temporal synchronization, this unique electron-photon source can be ideal for pump-probe applications with femtosecond time resolution.S ynchrotron light sources are powerful in generating bright X-rays for a wide range of applications in basic science, medicine, and industry (1). However, these machines are usually large in size and expensive for construction and maintenance and are thus unaffordable to many would-be users. With the advent of tabletop ultrashort and ultraintense lasers, laser plasma acceleration (LPA) proposed by Tajima and Dawson (2) has demonstrated its great potential as a compact accelerator and X-ray source. Significant progress in LPA was made in the last decade (3-11): Well-collimated (approximately millirad) quasi-monoenergetic electron beams were first observed in 2004, and the electron energy above gigaelectronvolts over centimeter-scale acceleration lengths were demonstrated in several laboratories in the last few years.While accelerating longitudinally in the laser wakefield, the electron beams also oscillate transversally (wiggling motion) due to the transverse structure of the wakefield, which emits wellcollimated betatron X-rays (12-14). Among several mechanisms to generate X-ray radiation from laser-plasma interactions (15-20), betatron radiation is straightforward and able to deliver larger X-ray photon fluxes per shot [∼10 8 phs/shot (21)] and higher photon energies [up to gamma rays (22)]. The betatron oscillation frequency is given by ω β = ω p (2γ) −1/2 , where ω p is the plasma frequency and γ is the Lorentz factor of the accelerated electron beam. For large-amplitude betatron oscillations (i.e., a few mi...

show abstract

Intense High-Contrast FemtosecondK-Shell X-Ray Source from Laser-Driven Ar Clusters

Cited by 61 publications

References 25 publications

Study of x-rays produced from debris-free sources with Ar, Kr and Kr/Ar mixture linear gas jets irradiated by UNR Leopard laser beam with fs and ns pulse duration

Study of x-rays produced from debris-free sources with Ar, Kr and Kr/Ar mixture linear gas jets irradiated by UNR Leopard laser beam with fs and ns pulse duration

Bright betatron X-ray radiation from a laser-driven-clustering gas target

Concurrence of monoenergetic electron beams and bright X-rays from an evolving laser-plasma bubble

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