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Journal articleTresca O, Dover NP, Cook N, et al., 2015,
Spectral Modification of Shock Accelerated Ions Using a Hydrodynamically Shaped Gas Target
, PHYSICAL REVIEW LETTERS, Vol: 115, ISSN: 0031-9007- Author Web Link
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- Citations: 30
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Journal articleCole JM, Wood J, Lopes NC, et al., 2015,
Laser-wakefield accelerators as hard x-ray sources for 3D medical imaging of human bone
, Scientific Reports, Vol: 5, ISSN: 2045-2322A bright μm-sized source of hard synchrotron x-rays (critical energy Ecrit > 30 keV) based on the betatron oscillations of laser wakefield accelerated electrons has been developed. The potential of this source for medical imaging was demonstrated by performing micro-computed tomography of a human femoral trabecular bone sample, allowing full 3D reconstruction to a resolution below 50 μm. The use of a 1 cm long wakefield accelerator means that the length of the beamline (excluding the laser) is dominated by the x-ray imaging distances rather than the electron acceleration distances. The source possesses high peak brightness, which allows each image to be recorded with a single exposure and reduces the time required for a full tomographic scan. These properties make this an interesting laboratory source for many tomographic imaging applications.
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Journal articleSavert, Mangles SPD, Schnell M, et al., 2015,
Direct observation of the injection dynamics of a laser wakefield accelerator using few-femtosecond shadowgraphy
, Physical Review Letters, Vol: 115, ISSN: 1079-7114We present few-femtosecond shadowgraphic snapshots taken during the non-linear evolution of the plasma wave in a laser wakefield accelerator with transverse synchronized few-cycle probe pulses. These snapshots can be directly associated with the electron density distribution within the plasma wave and give quantitative information about its size and shape. Our results show that self-injection of electrons into the first plasma wave period is induced by a lengthening of the first plasma period. Three dimensional particle in cell simulations support our observations.
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Journal articleMirfayzi SR, Kar S, Ahmed H, et al., 2015,
Calibration of time of flight detectors using laser-driven neutron source
, REVIEW OF SCIENTIFIC INSTRUMENTS, Vol: 86, ISSN: 0034-6748- Author Web Link
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- Citations: 21
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Journal articleKrygier AG, Morrison JT, Kar S, et al., 2015,
Selective deuterium ion acceleration using the Vulcan petawatt laser
, Physics of Plasmas, Vol: 22, ISSN: 1089-7674We report on the successful demonstration of selective acceleration of deuterium ions by targetnormalsheath acceleration (TNSA) with a high-energy petawatt laser. TNSA typically produces amulti-species ion beam that originates from the intrinsic hydrocarbon and water vapor contaminantson the target surface. Using the method first developed by Morrison et al. [Phys. Plasmas 19,030707 (2012)], an ion beam with >99% deuterium ions and peak energy 14 MeV/nucleon is producedwith a 200 J, 700 fs, >1020W=cm2 laser pulse by cryogenically freezing heavy water (D2O)vapor onto the rear surface of the target prior to the shot. Within the range of our detectors(0!–8.5!), we find laser-to-deuterium-ion energy conversion efficiency of 4.3% above 0.7 MeV/nucleon while a conservative estimate of the total beam gives a conversion efficiency of 9.4%.
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Journal articleSarri G, Poder K, Cole JM, et al., 2015,
Generation of neutral and high-density electron-positron pair plasmas in the laboratory
, Nature Communications, Vol: 6, ISSN: 2041-1723Electron-positron pair plasmas represent a unique state of matter, whereby there exists an intrinsic and complete symmetry between negatively charged (matter) and positively charged (antimatter) particles. These plasmas play a fundamental role in the dynamics of ultra-massive astrophysical objects and are believed to be associated with the emission of ultra-bright gamma-ray bursts. Despite extensive theoretical modelling, our knowledge of this state of matter is still speculative, owing to the extreme difficulty in recreating neutral matter-antimatter plasmas in the laboratory. Here we show that, by using a compact laser-driven setup, ion-free electron-positron plasmas with unique characteristics can be produced. Their charge neutrality (same amount of matter and antimatter), high-density and small divergence finally open up the possibility of studying electron-positron plasmas in controlled laboratory experiments.
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Conference paperSeely J, Feldman U, Hudson L, et al., 2015,
Betatron x-ray spectra recorded by a transmission crystal spectrometer in the 10 keV to 70 keV photon energy range
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Conference paperSarri G, Corvan DJ, Cole JM, et al., 2015,
Laser-driven Thomson scattering for the generation of ultra-bright multi-MeV gamma-ray beams
, Conference on Laser Acceleration of Electrons, Protons, and Ions III and Medical Applications of Laser-Generated Beams of Particles III, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X- Author Web Link
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- Citations: 1
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Journal articleWillingale L, Nagel SR, Thomas AGR, et al., 2015,
Characterization of laser-driven proton beams from near-critical density targets using copper activation
, JOURNAL OF PLASMA PHYSICS, Vol: 81, ISSN: 0022-3778- Author Web Link
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- Citations: 1
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Journal articleHooker SM, Bartolini R, Mangles SPD, et al., 2014,
Multi-pulse laser wakefield acceleration: a new route to efficient, high-repetition-rate plasma accelerators and high flux radiation sources
, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 47, ISSN: 0953-4075- Author Web Link
- Open Access Link
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- Citations: 26
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Journal articleSarri G, Corvan DJ, Schumaker W, et al., 2014,
Ultrahigh brilliance multi-MeV gamma-Ray beams from nonlinear relativistic Thomson scattering
, Physical Review Letters, Vol: 113, Pages: 1-5, ISSN: 0031-9007We report on the generation of a narrow divergence (θγ<2.5 mrad), multi-MeV (Emax≈18 MeV) and ultrahigh peak brilliance (>1.8×1020 photons s−1 mm−2 mrad−2 0.1% BW) γ-ray beam from the scattering of an ultrarelativistic laser-wakefield accelerated electron beam in the field of a relativistically intense laser (dimensionless amplitude a0≈2). The spectrum of the generated γ-ray beam is measured, with MeV resolution, seamlessly from 6 to 18 MeV, giving clear evidence of the onset of nonlinear relativistic Thomson scattering. To the best of our knowledge, this photon source has the highest peak brilliance in the multi-MeV regime ever reported in the literature.
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Journal articleAlejo A, Kar S, Ahmed H, et al., 2014,
Characterisation of deuterium spectra from laser driven multi-species sources by employing differentially filtered image plate detectors in Thomson spectrometers
, REVIEW OF SCIENTIFIC INSTRUMENTS, Vol: 85, ISSN: 0034-6748- Author Web Link
- Open Access Link
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- Citations: 26
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Journal articleGreen JS, Dover NP, Borghesi M, et al., 2014,
Enhanced proton beam collimation in the ultra-intense short pulse regime
, PLASMA PHYSICS AND CONTROLLED FUSION, Vol: 56, ISSN: 0741-3335- Author Web Link
- Open Access Link
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- Citations: 17
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Journal articleKamperidis C, Dimitriou V, Mangles SPD, et al., 2014,
Low energy spread electron beams from ionization injection in a weakly relativistic laser wakefield accelerator
, PLASMA PHYSICS AND CONTROLLED FUSION, Vol: 56, ISSN: 0741-3335- Author Web Link
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- Citations: 13
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Journal articleAlbert F, Thomas AGR, Mangles SPD, et al., 2014,
Laser wakefield accelerator based light sources: potential applications and requirements
, PLASMA PHYSICS AND CONTROLLED FUSION, Vol: 56, ISSN: 0741-3335- Author Web Link
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- Citations: 67
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Journal articleNajmudin Z, Kneip S, Bloom MS, et al., 2014,
Compact laser accelerators for X-ray phase-contrast imaging
, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, Vol: 372, ISSN: 1364-503X- Author Web Link
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- Citations: 25
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Conference paperMangles SPD, Bloom MS, Bryant J, et al., 2014,
Producing bright X-rays for imaging applications using a laser wakefield accelerator
, Conference on Lasers and Electro-Optics (CLEO), Publisher: IEEE, ISSN: 2160-9020 -
Conference paperSarri G, Schumaker W, Di Piazza A, et al., 2013,
Laser-driven generation of collimated ultra-relativistic positron beams
, 40th Conference of the European-Physical-Society on Plasma Physics, Publisher: IOP PUBLISHING LTD, ISSN: 0741-3335- Author Web Link
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- Citations: 28
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Journal articleThaury C, Phuoc KT, Corde S, et al., 2013,
Probing electron acceleration and x-ray emission in laser-plasma accelerators
, PHYSICS OF PLASMAS, Vol: 20, ISSN: 1070-664X- Author Web Link
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- Citations: 2
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Journal articleGenoud G, Bloom MS, Vieira J, et al., 2013,
Increasing energy coupling into plasma waves by tailoring the laser radial focal spot distribution in a laser wakefield accelerator
, PHYSICS OF PLASMAS, Vol: 20, ISSN: 1070-664X- Author Web Link
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- Citations: 5
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Journal articlePalmer CAJ, Schreiber J, Nagel SR, et al., 2012,
Rayleigh-Taylor Instability of an Ultrathin Foil Accelerated by the Radiation Pressure of an Intense Laser
, PHYSICAL REVIEW LETTERS, Vol: 108, ISSN: 0031-9007- Author Web Link
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- Citations: 104
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Journal articleKneip S, McGuffey C, Dollar F, et al., 2011,
X-ray phase contrast imaging of biological specimens with femtosecond pulses of betatron radiation from a compact laser plasma wakefield accelerator
, APPLIED PHYSICS LETTERS, Vol: 99, ISSN: 0003-6951- Author Web Link
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- Citations: 101
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Journal articleStreeter MJV, Foster PS, Cameron FH, et al., 2011,
Relativistic plasma surfaces as an efficient second harmonic generator
, NEW JOURNAL OF PHYSICS, Vol: 13, ISSN: 1367-2630- Author Web Link
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- Citations: 25
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Journal articlePalmer CAJ, Dover NP, Pogorelsky I, et al., 2011,
Monoenergetic Proton Beams Accelerated by a Radiation Pressure Driven Shock
, PHYSICAL REVIEW LETTERS, Vol: 106, ISSN: 0031-9007- Author Web Link
- Open Access Link
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- Citations: 181
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Journal articleSchreiber J, Bellei C, Mangles SPD, et al., 2010,
Complete Temporal Characterization of Asymmetric Pulse Compression in a Laser Wakefield
, PHYSICAL REVIEW LETTERS, Vol: 105, ISSN: 0031-9007- Author Web Link
- Open Access Link
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- Citations: 47
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Journal articleKneip S, McGuffey C, Martins JL, et al., 2010,
Bright spatially coherent synchrotron X-rays from a table-top source
, NATURE PHYSICS, Vol: 6, Pages: 980-983, ISSN: 1745-2473- Author Web Link
- Open Access Link
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- Citations: 336
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Journal articleKneip S, McGuffey C, Martins JL, et al., 2010,
A Bright Spatially-Coherent Compact X-ray Synchrotron Source
, Nature Physics, ISSN: 1745-2473Each successive generation of x-ray machines has opened up new frontiers inscience, such as the first radiographs and the determination of the structureof DNA. State-of-the-art x-ray sources can now produce coherent high brightnesskeV x-rays and promise a new revolution in imaging complex systems on nanometreand femtosecond scales. Despite the demand, only a few dedicated synchrotronfacilities exist worldwide, partially due the size and cost of conventional(accelerator) technology. Here we demonstrate the use of a recently developedcompact laser-plasma accelerator to produce a well-collimated,spatially-coherent, intrinsically ultrafast source of hard x-rays. This methodreduces the size of the synchrotron source from the tens of metres tocentimetre scale, accelerating and wiggling a high electron chargesimultaneously. This leads to a narrow-energy spread electron beam and x-raysource that is >1000 times brighter than previously reported plasma wiggler andthus has the potential to facilitate a myriad of uses across the whole spectrumof light-source applications.
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Journal articleWillingale L, Thomas AGR, Nilson PM, et al., 2010,
Fast Advection of Magnetic Fields by Hot Electrons
, PHYSICAL REVIEW LETTERS, Vol: 105, ISSN: 0031-9007- Author Web Link
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- Citations: 43
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Journal articleBellei C, Nagel SR, Kar S, et al., 2010,
Micron-scale fast electron filaments and recirculation determined from rear-side optical emission in high-intensity laser-solid interactions
, NEW JOURNAL OF PHYSICS, Vol: 12, ISSN: 1367-2630- Author Web Link
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- Citations: 14
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Journal articleWillingale L, Nilson PM, Kaluza MC, et al., 2010,
Proton deflectometry of a magnetic reconnection geometry
, PHYSICS OF PLASMAS, Vol: 17, ISSN: 1070-664X- Author Web Link
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- Citations: 52
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Journal articleNilson PM, Mangles SPD, Willingale L, et al., 2009,
Generation of Ultrahigh-Velocity Ionizing Shocks with Petawatt-Class Laser Pulses
, PHYSICAL REVIEW LETTERS, Vol: 103, ISSN: 0031-9007- Author Web Link
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- Citations: 18
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Journal articleKneip S, Nagel SR, Martins SF, et al., 2009,
Near-GeV Acceleration of Electrons by a Nonlinear Plasma Wave Driven by a Self-Guided Laser Pulse
, PHYSICAL REVIEW LETTERS, Vol: 103, ISSN: 0031-9007- Author Web Link
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- Citations: 238
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Journal articleWillingale L, Nagel SR, Thomas AGR, et al., 2009,
Characterization of High-Intensity Laser Propagation in the Relativistic Transparent Regime through Measurements of Energetic Proton Beams
, PHYSICAL REVIEW LETTERS, Vol: 102, ISSN: 0031-9007- Author Web Link
- Open Access Link
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- Citations: 89
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Journal articleThomas AGR, Murphy CD, Mangles SPD, et al., 2008,
Monoenergetic electronic beam production using dual collinear laser pulses
, PHYSICAL REVIEW LETTERS, Vol: 100, ISSN: 0031-9007- Author Web Link
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- Citations: 22
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Journal articleKneip S, Nagel SR, Bellei C, et al., 2008,
Observation of synchrotron radiation from electrons accelerated in a petawatt-laser-generated plasma cavity
, PHYSICAL REVIEW LETTERS, Vol: 100, ISSN: 0031-9007- Author Web Link
- Open Access Link
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- Citations: 170
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Journal articleThomas AGR, Najmudin Z, Mangles SPD, et al., 2007,
Effect of laser-focusing conditions on propagation and monoenergetic electron production in laser-wakefield accelerators
, PHYSICAL REVIEW LETTERS, Vol: 98, ISSN: 0031-9007- Author Web Link
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- Citations: 91
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Journal articleThomas AGR, Mangles SPD, Najmudin Z, et al., 2007,
Measurements of wave-breaking radiation from a laser-wakefield accelerator
, PHYSICAL REVIEW LETTERS, Vol: 98, ISSN: 0031-9007- Author Web Link
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- Citations: 45
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Journal articleNilson PM, Willingale L, Kaluza MC, et al., 2006,
Magnetic reconnection and plasma dynamics in two-beam laser-solid interactions
, PHYSICAL REVIEW LETTERS, Vol: 97 -
Journal articleWillingale L, Mangles SPD, Nilson PM, et al., 2006,
Collimated multi-MeV ion beams from high-intensity laser interactions with underdense plasma
, PHYSICAL REVIEW LETTERS, Vol: 96, ISSN: 0031-9007- Author Web Link
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- Citations: 147
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Journal articleMangles SPD, Thomas AGR, Kaluza MC, et al., 2006,
Laser-wakefield acceleration of monoenergetic electron beams in the first plasma-wave period
, PHYSICAL REVIEW LETTERS, Vol: 96, ISSN: 0031-9007- Author Web Link
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- Citations: 152
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Journal articleKrushelnick K, Najmudin Z, 2006,
Plasmas surf the high-energy frontier
, PHYSICS WORLD, Vol: 19, Pages: 24-28, ISSN: 0953-8585 -
Journal articleMangles SPD, Walton BR, Tzoufras M, et al., 2005,
Electron acceleration in cavitated channels formed by a petawatt laser in low-density plasma
, PHYSICAL REVIEW LETTERS, Vol: 94, ISSN: 0031-9007- Author Web Link
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- Citations: 155
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Journal articleWei MS, Mangles SPD, Najmudin Z, et al., 2004,
Ion acceleration by collisionless shocks in high-intensity-laser-underdense-plasma interaction
, PHYSICAL REVIEW LETTERS, Vol: 93, ISSN: 0031-9007- Author Web Link
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- Citations: 123
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Journal articleMangles SPD, Murphy CD, Najmudin Z, et al., 2004,
Monoenergetic beams of relativistic electrons from intense laser-plasma interactions
, NATURE, Vol: 431, Pages: 535-538, ISSN: 0028-0836- Author Web Link
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- Citations: 1647
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Journal articleNajmudin Z, Tatarakis M, Pukhov A, et al., 2001,
Measurements of the inverse Faraday effect from relativistic laser interactions with an underdense plasma
, PHYSICAL REVIEW LETTERS, Vol: 87, ISSN: 0031-9007- Author Web Link
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- Citations: 100
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Journal articleSantala MIK, Najmudin Z, Clark EL, et al., 2001,
Observation of a hot high-current electron beam from a self-modulated laser wakefield accelerator
, PHYSICAL REVIEW LETTERS, Vol: 86, Pages: 1227-1230, ISSN: 0031-9007- Author Web Link
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- Citations: 105
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Journal articleKrushelnick K, Tatarakis M, Dangor AE, 1999,
Multi MeV production from high intensity laser interactions with underdense plasmas
, Physical Review Letters, Vol: 83, Pages: 737-740 -
Journal articleMODENA A, NAJMUDIN Z, DANGOR AE, et al., 1995,
ELECTRON ACCELERATION FROM THE BREAKING OF RELATIVISTIC PLASMA-WAVES
, NATURE, Vol: 377, Pages: 606-608, ISSN: 0028-0836- Author Web Link
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- Citations: 777
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