Observation of Betatron X-Ray Radiation in a Self-Modulated Laser Wakefield Accelerator Driven with Picosecond Laser Pulses

Albert, F.; Lemos, N.; Shaw, Jessica; Pollock, B.; Goyon, C.; Schumaker, W.; Saunders, A. M.; Marsh, K. A.; Pak, A.; Ralph, J. E.; Martins, Joana; Amorim, L. D.; Falcone, R. W.; Glenzer, S. H.; Moody, J. D.; Joshi, C.

doi:10.1103/physrevlett.118.134801

Cited by 59 publications

(35 citation statements)

References 37 publications

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“… The average photon flux and characteristic energy of the X-ray source described here in comparison with previous results on laser-betatron X-ray sources ( 7 , 11 , 19 – 21 ). The lines represent the incident photon flux on a typical 4-MP detector after passing through 1 cm of water, assuming the X-ray beam fills the detector.…”

Section: Discussionsupporting

confidence: 54%

“…As an example of imaging capability we demonstrated

CT of a murine embryo. The X-ray parameters measured in this experiment are compared with previous laser-betatron results ( 7 , 11 , 19 – 21 ) in Fig. 5 .…”

Section: Discussionmentioning

confidence: 78%

“…With our current apparatus operating at a repetition rate of 0.05 Hz the average photon flux is

photons (ph)

s −1 mrad −2 . The laser systems required to drive these plasma accelerators can be housed in a standard-size laboratory space so it is feasible to deploy the laser-betatron source for a wide range of imaging applications ( 15 ) in biomedical science ( 16 – 20 ), material science, and high-energy–density physics ( 21 ).…”

mentioning

confidence: 99%

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High-resolution μCT of a mouse embryo using a compact laser-driven X-ray betatron source

Cole

Symes

Lopes

et al. 2018

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

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SignificanceHigh-resolution microcomputed tomography with benchtop X-ray sources requires long scan times because of the heat load limitation on the anode. We present an alternative, high-brightness plasma-based X-ray source that does not suffer from this restriction. A demonstration of tomography of a centimeter-scale complex organism achieves equivalent quality to a commercial scanner. We will soon be able to record such scans in minutes, rather than the hours required by conventional X-ray tubes.

show abstract

Section: Discussionsupporting

confidence: 54%

“…As an example of imaging capability we demonstrated

CT of a murine embryo. The X-ray parameters measured in this experiment are compared with previous laser-betatron results ( 7 , 11 , 19 – 21 ) in Fig. 5 .…”

Section: Discussionmentioning

confidence: 78%

“…With our current apparatus operating at a repetition rate of 0.05 Hz the average photon flux is

photons (ph)

mentioning

confidence: 99%

See 1 more Smart Citation

High-resolution μCT of a mouse embryo using a compact laser-driven X-ray betatron source

Cole

Symes

Lopes

et al. 2018

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

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“…Experimental and theoretical studies in the past decades on laser-solid interactions at relativistic intensities (I L > 10 18 W/cm 2 for λ ∼ 1 µm) have established that electrons can be generated with energies of 10s of MeV at high efficiencies [1][2][3][4][5][6]. These electrons provide the energy for the production of secondary sources such as x-rays [7,8], ions [9,10], neutrons [11,12] and positrons [13]. Understanding electron acceleration in all laser regimes is critical to applications based on laserdriven sources for scaled experiments that study astrophysical phenomenon [14], compressed heated material [15,16], and high energy density conditions [17].…”

mentioning

confidence: 99%

Production of relativistic electrons at subrelativistic laser intensities

Williams¹,

Link²,

Sherlock³

et al. 2020

Phys. Rev. E

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“…These designs require good control of the laser incidence on the plasma channel. Laser drivers with duration close to the bubble size can be used to induce direct laser acceleration 23 and, for longer pulses (with ps duration), self-modulated laser-wakefield acceleration has been explored as an X-ray source 24,25 for high-density matter probing. In all of these configurations, the laser driver has a Gaussian profile, which is also the typical profile used in the vast majority of experiments in this area.…”

Section: Introductionmentioning

confidence: 99%

Radiation emission in laser-wakefields driven by structured laser pulses with orbital angular momentum

Martins

Vieira

Ferri

et al. 2019

Sci Rep

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High-intensity X-ray sources are invaluable tools, enabling experiments at the forefront of our understanding of materials science, chemistry, biology, and physics. Laser-plasma electron accelerators are sources of high-intensity X-rays, as electrons accelerated in wakefields emit short-wavelength radiation due to betatron oscillations. While applications such as phasecontrast imaging with these betatron sources have already been demonstrated, others would require higher photon number and would benefit from increased tunability. In this paper we demonstrate, through detailed 3D simulations, a novel configuration for a laser-wakefield betatron source that increases the energy of the X-ray emission and also provides increased flexibility in the tuning of the X-ray photon energy. This is made by combining two Laguerre-Gaussian pulses with non-zero net orbital angular momentum, leading to a rotation of the intensity pattern, and hence, of the driven wakefields. The helical motion driven by the laser rotation is found to dominate the radiation emission, rather than the betatron oscillations. Moreover, the radius of this helical motion can be controlled through the laser spot size and orbital angular momentum indexes, meaning that the radiation can be tuned fully independently of the plasma parameters.

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Observation of Betatron X-Ray Radiation in a Self-Modulated Laser Wakefield Accelerator Driven with Picosecond Laser Pulses

Cited by 59 publications

References 37 publications

High-resolution μCT of a mouse embryo using a compact laser-driven X-ray betatron source

High-resolution μCT of a mouse embryo using a compact laser-driven X-ray betatron source

Production of relativistic electrons at subrelativistic laser intensities

Radiation emission in laser-wakefields driven by structured laser pulses with orbital angular momentum

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