Absolute keV x-ray yield and conversion efficiency in over dense Si sub-petawatt laser plasma

Sergey N. Ryazantsev; Artem S. Martynenko; Maksim V. Sedov; Igor Yu Skobelev; Mikhail D. Mishchenko; Yaroslav S. Lavrinenko; Christopher D. Baird; Nicola Booth; Phil Durey; Leonard N.K. Döhl; Damon Farley; Kathryn L. Lancaster; Paul McKenna; Christopher D. Murphy; Tatiana A. Pikuz; Christopher Spindloe; Nigel Woolsey; Sergey A. Pikuz

doi:10.1088/1361-6587/ac8b33

Absolute keV x-ray yield and conversion efficiency in over dense Si sub-petawatt laser plasma

Sergey N. Ryazantsev^*, Artem S. Martynenko, Maksim V. Sedov, Igor Yu Skobelev, Mikhail D. Mishchenko, Yaroslav S. Lavrinenko, Christopher D. Baird, Nicola Booth, Phil Durey, Leonard N.K. Döhl, Damon Farley, Kathryn L. Lancaster, Paul McKenna, Christopher D. Murphy, Tatiana A. Pikuz, Christopher Spindloe, Nigel Woolsey, Sergey A. Pikuz

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Laser-produced plasmas are bright, short sources of x-rays commonly used for time-resolved imaging and spectroscopy. Their usage implies accurate knowledge of laser-to-x-ray conversion efficiency (CE), spectrum, photon yield and angular distribution. Here, we report on soft x-ray emission in the direction close to the target normal from a thin Si foil irradiated by a sub-PW picosecond laser pulse. These absolute measurements cover a continuous and broad spectral range that extends from 4.75 to 7.3 Å (1.7-2.6 keV). The x-ray spectrum consists of spectral line transitions from highly charged ions and broadband emission with contributions from recombination and free-free processes that occur when electrons decelerate in plasma electromagnetic fields. Angular distribution of the emission was investigated via particle-in-cell simulations, which allowed to estimate the yield into the full solid angle. We find that experimental and simulation estimations of laser to free-free emission CE are in good agreement.

Original language	English
Article number	105016
Number of pages	12
Journal	Plasma Physics and Controlled Fusion
Volume	64
Issue number	10
DOIs	https://doi.org/10.1088/1361-6587/ac8b33
Publication status	Published - 7 Sept 2022

Bibliographical note

This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

Keywords

absolute emissivity of laser plasma
crystal x-ray spectrometer
laser to x-rays conversion efficiency
PW laser plasma

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Ryazantsev, S. N., Martynenko, A. S., Sedov, M. V., Skobelev, I. Y., Mishchenko, M. D., Lavrinenko, Y. S., Baird, C. D., Booth, N., Durey, P., Döhl, L. N. K., Farley, D., Lancaster, K. L., McKenna, P., Murphy, C. D., Pikuz, T. A., Spindloe, C., Woolsey, N., & Pikuz, S. A. (2022). Absolute keV x-ray yield and conversion efficiency in over dense Si sub-petawatt laser plasma. Plasma Physics and Controlled Fusion, 64(10), Article 105016. https://doi.org/10.1088/1361-6587/ac8b33

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title = "Absolute keV x-ray yield and conversion efficiency in over dense Si sub-petawatt laser plasma",

abstract = "Laser-produced plasmas are bright, short sources of x-rays commonly used for time-resolved imaging and spectroscopy. Their usage implies accurate knowledge of laser-to-x-ray conversion efficiency (CE), spectrum, photon yield and angular distribution. Here, we report on soft x-ray emission in the direction close to the target normal from a thin Si foil irradiated by a sub-PW picosecond laser pulse. These absolute measurements cover a continuous and broad spectral range that extends from 4.75 to 7.3 {\AA} (1.7-2.6 keV). The x-ray spectrum consists of spectral line transitions from highly charged ions and broadband emission with contributions from recombination and free-free processes that occur when electrons decelerate in plasma electromagnetic fields. Angular distribution of the emission was investigated via particle-in-cell simulations, which allowed to estimate the yield into the full solid angle. We find that experimental and simulation estimations of laser to free-free emission CE are in good agreement.",

keywords = "absolute emissivity of laser plasma, crystal x-ray spectrometer, laser to x-rays conversion efficiency, PW laser plasma",

author = "Ryazantsev, {Sergey N.} and Martynenko, {Artem S.} and Sedov, {Maksim V.} and Skobelev, {Igor Yu} and Mishchenko, {Mikhail D.} and Lavrinenko, {Yaroslav S.} and Baird, {Christopher D.} and Nicola Booth and Phil Durey and D{\"o}hl, {Leonard N.K.} and Damon Farley and Lancaster, {Kathryn L.} and Paul McKenna and Murphy, {Christopher D.} and Pikuz, {Tatiana A.} and Christopher Spindloe and Nigel Woolsey and Pikuz, {Sergey A.}",

note = "This is an author-produced version of the published paper. Uploaded in accordance with the publisher{\textquoteright}s self-archiving policy. Further copying may not be permitted; contact the publisher for details",

year = "2022",

month = sep,

day = "7",

doi = "10.1088/1361-6587/ac8b33",

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Ryazantsev, SN, Martynenko, AS, Sedov, MV, Skobelev, IY, Mishchenko, MD, Lavrinenko, YS, Baird, CD, Booth, N, Durey, P, Döhl, LNK, Farley, D, Lancaster, KL, McKenna, P, Murphy, CD, Pikuz, TA, Spindloe, C, Woolsey, N & Pikuz, SA 2022, 'Absolute keV x-ray yield and conversion efficiency in over dense Si sub-petawatt laser plasma', Plasma Physics and Controlled Fusion, vol. 64, no. 10, 105016. https://doi.org/10.1088/1361-6587/ac8b33

TY - JOUR

T1 - Absolute keV x-ray yield and conversion efficiency in over dense Si sub-petawatt laser plasma

AU - Ryazantsev, Sergey N.

AU - Martynenko, Artem S.

AU - Sedov, Maksim V.

AU - Skobelev, Igor Yu

AU - Mishchenko, Mikhail D.

AU - Lavrinenko, Yaroslav S.

AU - Baird, Christopher D.

AU - Booth, Nicola

AU - Durey, Phil

AU - Döhl, Leonard N.K.

AU - Farley, Damon

AU - Lancaster, Kathryn L.

AU - McKenna, Paul

AU - Murphy, Christopher D.

AU - Pikuz, Tatiana A.

AU - Spindloe, Christopher

AU - Woolsey, Nigel

AU - Pikuz, Sergey A.

N1 - This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

PY - 2022/9/7

Y1 - 2022/9/7

N2 - Laser-produced plasmas are bright, short sources of x-rays commonly used for time-resolved imaging and spectroscopy. Their usage implies accurate knowledge of laser-to-x-ray conversion efficiency (CE), spectrum, photon yield and angular distribution. Here, we report on soft x-ray emission in the direction close to the target normal from a thin Si foil irradiated by a sub-PW picosecond laser pulse. These absolute measurements cover a continuous and broad spectral range that extends from 4.75 to 7.3 Å (1.7-2.6 keV). The x-ray spectrum consists of spectral line transitions from highly charged ions and broadband emission with contributions from recombination and free-free processes that occur when electrons decelerate in plasma electromagnetic fields. Angular distribution of the emission was investigated via particle-in-cell simulations, which allowed to estimate the yield into the full solid angle. We find that experimental and simulation estimations of laser to free-free emission CE are in good agreement.

AB - Laser-produced plasmas are bright, short sources of x-rays commonly used for time-resolved imaging and spectroscopy. Their usage implies accurate knowledge of laser-to-x-ray conversion efficiency (CE), spectrum, photon yield and angular distribution. Here, we report on soft x-ray emission in the direction close to the target normal from a thin Si foil irradiated by a sub-PW picosecond laser pulse. These absolute measurements cover a continuous and broad spectral range that extends from 4.75 to 7.3 Å (1.7-2.6 keV). The x-ray spectrum consists of spectral line transitions from highly charged ions and broadband emission with contributions from recombination and free-free processes that occur when electrons decelerate in plasma electromagnetic fields. Angular distribution of the emission was investigated via particle-in-cell simulations, which allowed to estimate the yield into the full solid angle. We find that experimental and simulation estimations of laser to free-free emission CE are in good agreement.

KW - absolute emissivity of laser plasma

KW - crystal x-ray spectrometer

KW - laser to x-rays conversion efficiency

KW - PW laser plasma

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U2 - 10.1088/1361-6587/ac8b33

DO - 10.1088/1361-6587/ac8b33

M3 - Article

AN - SCOPUS:85138195126

SN - 0741-3335

VL - 64

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 10

M1 - 105016

ER -

Absolute keV x-ray yield and conversion efficiency in over dense Si sub-petawatt laser plasma

Abstract

Bibliographical note

Keywords

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