Development of a Platform at the Matter in Extreme Conditions End Station for Characterization of Matter Heated by Intense Laser-Accelerated Protons

Bhutwala, Krish; Bailly-Grandvaux, M.; Kim, Joohwan; Dozières, Maylis; Galtier, E.; Curry, C. B.; Gauthier, M.; Cunningham, Eric; Lee, Hae Ja; Forestier-Colleoni, P.; Higginson, A.; Aybar, Nicholas; Hua, Rui; Edghill, Brandon; Strehlow, Joseph; Dyer, Gilliss; Glenzer, S. H.; Kim, Jongjin B.; Alexander, Neil B.; Rio, Eduardo Del; Wei, M. S.; Ping, Yuan; McKelvey, Andrew; Collins, G. W.; Beg, F. N.; McGuffey, C.

doi:10.1109/tps.2020.3009639

Cited by 5 publications

(4 citation statements)

References 27 publications

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“…The quasi-isotropic nature of the x-ray bremsstrahlung radiation poses a challenge for the full suite of x-ray diagnostics that are situated at small distances from the laser-plasma target, including x-ray diffraction, x-ray fluorescence, and inelastic x-ray scattering [29,30]. Diagnostic techniques such as x-ray phase contrast imaging [31][32][33] and small angle x-ray scattering (SAXS) [34], where the detectors are located several meters away from the interaction and leverage the directionality and high brightness of the XFEL, have not suffered from the same issues of x-ray background.…”

Section: Jinst 17 T04004mentioning

confidence: 99%

Investigation of hard x-ray emissions from terawatt laser-irradiated foils at the Matter in Extreme Conditions instrument of the Linac Coherent Light Source

et al. 2022

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In this technical report, we investigate the hard x-ray background produced at the Matter in Extreme Conditions (MEC) instrument of the Linac Coherent Light Source (LCLS) from the interaction of a high-intensity (∼1019 W/cm2) femtosecond laser with solid μm-thick aluminum and polypropylene targets. This background is dominated by bremsstrahlung from laser-generated relativistic electrons, and a measurement of the broadband x-ray spectrum via differential x-ray energy filtering was used to infer the existence of two electron distributions with electron temperatures of Thot = 500 ± 300 keV and Tcold = 5.0 ± 0.5 keV. Simultaneous single-shot measurements of the proton energies accelerated from laser-irradiated solid targets could be correlated with these measurements to further constrain the on-target laser parameters. Measurements of the hard x-ray photon background generated from laser-irradiated foils can be used to directly monitor and test the signal-to-background limits of silicon-based hybrid pixel array x-ray detectors at laser intensities approaching 1019 W/cm2.

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Section: Jinst 17 T04004mentioning

confidence: 99%

Investigation of hard x-ray emissions from terawatt laser-irradiated foils at the Matter in Extreme Conditions instrument of the Linac Coherent Light Source

et al. 2022

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“…It opens up the possibility to generate multi-MeV protons up to 100 MeV energy 4 and ion beams with high brilliance and relatively short time duration at high repetition rate. The strongly localized energy deposition of ions in matter, due to the existence of the Bragg Peak, is an important characteristic for many applications, including proton therapy 5 , 6 , ion-induced isochoric heating of matter 7 – 10 , proton radiography 11 , 12 , alpha particle heating in inertial confinement fusion (ICF) 13 , 14 , the proton fast ignition approach to ICF 15 , and heavy ion fusion 16 , 17 .…”

Section: Introductionmentioning

confidence: 99%

A quasi-monoenergetic short time duration compact proton source for probing high energy density states of matter

Apiñaniz

Malko

Fedosejevs

et al. 2021

Sci Rep

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We report on the development of a highly directional, narrow energy band, short time duration proton beam operating at high repetition rate. The protons are generated with an ultrashort-pulse laser interacting with a solid target and converted to a pencil-like narrow-band beam using a compact magnet-based energy selector. We experimentally demonstrate the production of a proton beam with an energy of 500 keV and energy spread well below 10$$\% $$ % , and a pulse duration of 260 ps. The energy loss of this beam is measured in a 2 $$\upmu $$ μ m thick solid Mylar target and found to be in good agreement with the theoretical predictions. The short time duration of the proton pulse makes it particularly well suited for applications involving the probing of highly transient plasma states produced in laser-matter interaction experiments. This proton source is particularly relevant for measurements of the proton stopping power in high energy density plasmas and warm dense matter.

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“…Lasers can accelerate MeV ions in an intense lasermatter interaction of relativistic irradiances, that is, Iλ 2 > 10 18 W cm −2 µm 2 [1]. This process is of tremendous interest because of the broad range of applications of energetic ions that include ion radiography of dense plasmas [2], ion fast ignition for inertial confinement [3], and the generation and probing of warm dense matter states [4,5], among others. The ion beams have current densities of ∼10 10 A cm −2 [6] and a short, picosecond bunch length, allowing for rapid dose deposition and time resolution that cannot be achieved with the nanosecond bunch length in conventional radiofrequency accelerators [7].…”

Section: Introductionmentioning

confidence: 99%

The effects of laser pulse length and collisional ionization on the acceleration of titanium ions

Strehlow

Kawahito

Bailly-Grandvaux

et al. 2021

Plasma Phys. Control. Fusion

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The interaction of a relativistic laser pulse ( > 1018 W cm−2 µm2) with foil targets can accelerate ions to energies of tens of MeV u−1 with optimized laser and target parameters. We report the results on simulations of the interaction of a 6.0 × 1020 W cm−2 laser pulse incident on ultrathin (10–500 nm) titanium foils to investigate the roles of laser pulse duration and ionization mechanisms in the acceleration of titanium ions. While holding peak intensity constant, two laser pulse durations were investigated, 140 and 650 fs. The optimum thickness is dependent on pulse duration, as it requires the concurrence of target transparency with the incidence of the peak laser intensity. The collisional processes do not play a significant role in Ti ion beam generation from the 140 fs laser pulse duration at the optimum thickness (30 nm). However, for the 650 fs laser optimum, collisions improve the conversion efficiency of highly energetic ( > 10 MeV u−1), high charge titanium (Ti21 − 22 +) by a factor of 20, and the titanium ion cutoff energy by ∼15%. This improvement is due to the fact that collisional ionization increases the electron density of the plasma, which delays the time of relativistic transparency, causing collisions to decrease the optimum foil thickness from 150 to 100 nm. Additionally, collisional ionization increases the charge-to-mass ratio of the titanium, and injects more electrons into the accelerating sheath field. At the optimum thickness, target normal sheath acceleration is the dominant mechanism of acceleration, with additional contributions from radiation pressure and shock wave acceleration.

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Development of a Platform at the Matter in Extreme Conditions End Station for Characterization of Matter Heated by Intense Laser-Accelerated Protons

Cited by 5 publications

References 27 publications

Investigation of hard x-ray emissions from terawatt laser-irradiated foils at the Matter in Extreme Conditions instrument of the Linac Coherent Light Source

Investigation of hard x-ray emissions from terawatt laser-irradiated foils at the Matter in Extreme Conditions instrument of the Linac Coherent Light Source

A quasi-monoenergetic short time duration compact proton source for probing high energy density states of matter

The effects of laser pulse length and collisional ionization on the acceleration of titanium ions

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