Relativistic Doppler-boosted γ-rays in high fields

Remi Capdessus, Martin King, Dario Del Sorbo, Matthew Duff, Christopher P. Ridgers, Paul McKenna

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The relativistic Doppler effect is one of the most famous implications of the principles of special relativity and is intrinsic to moving radiation sources, relativistic optics and many astrophysical phenomena. It occurs in the case of a plasma sail accelerated to relativistic velocities by an external driver, such as an ultra-intense laser pulse. Here we show that the relativistic Doppler effect on the high energy synchrotron photon emission (∼ 10 MeV), strongly depends on two intrinsic properties of the plasma (charge state and ion mass) and the transverse extent of the driver. When the moving plasma becomes relativistically transparent to the driver, we show that the γ-ray emission is Doppler-boosted and the angular emission decreases; optimal for the highest charge-to-mass ratio ion species (i.e. a hydrogen plasma). This provides new fundamental insight into the generation of γ-rays in extreme conditions and informs related experiments using multi-petawatt laser facilities.
LanguageEnglish
Article number9155
Number of pages12
JournalScientific Reports
Volume8
DOIs
Publication statusPublished - 14 Jun 2018

Fingerprint

Doppler effect
gamma rays
relativistic velocity
hydrogen plasma
radiation sources
mass ratios
lasers
relativity
astrophysics
synchrotrons
ions
optics
photons
pulses
energy

Keywords

  • Doppler effect
  • high energy
  • synchrotron photon emission
  • plasma

Cite this

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title = "Relativistic Doppler-boosted γ-rays in high fields",
abstract = "The relativistic Doppler effect is one of the most famous implications of the principles of special relativity and is intrinsic to moving radiation sources, relativistic optics and many astrophysical phenomena. It occurs in the case of a plasma sail accelerated to relativistic velocities by an external driver, such as an ultra-intense laser pulse. Here we show that the relativistic Doppler effect on the high energy synchrotron photon emission (∼ 10 MeV), strongly depends on two intrinsic properties of the plasma (charge state and ion mass) and the transverse extent of the driver. When the moving plasma becomes relativistically transparent to the driver, we show that the γ-ray emission is Doppler-boosted and the angular emission decreases; optimal for the highest charge-to-mass ratio ion species (i.e. a hydrogen plasma). This provides new fundamental insight into the generation of γ-rays in extreme conditions and informs related experiments using multi-petawatt laser facilities.",
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author = "Remi Capdessus and Martin King and {Del Sorbo}, Dario and Matthew Duff and Ridgers, {Christopher P.} and Paul McKenna",
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Relativistic Doppler-boosted γ-rays in high fields. / Capdessus, Remi; King, Martin; Del Sorbo, Dario; Duff, Matthew; Ridgers, Christopher P.; McKenna, Paul.

In: Scientific Reports, Vol. 8, 9155, 14.06.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Relativistic Doppler-boosted γ-rays in high fields

AU - Capdessus, Remi

AU - King, Martin

AU - Del Sorbo, Dario

AU - Duff, Matthew

AU - Ridgers, Christopher P.

AU - McKenna, Paul

PY - 2018/6/14

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AB - The relativistic Doppler effect is one of the most famous implications of the principles of special relativity and is intrinsic to moving radiation sources, relativistic optics and many astrophysical phenomena. It occurs in the case of a plasma sail accelerated to relativistic velocities by an external driver, such as an ultra-intense laser pulse. Here we show that the relativistic Doppler effect on the high energy synchrotron photon emission (∼ 10 MeV), strongly depends on two intrinsic properties of the plasma (charge state and ion mass) and the transverse extent of the driver. When the moving plasma becomes relativistically transparent to the driver, we show that the γ-ray emission is Doppler-boosted and the angular emission decreases; optimal for the highest charge-to-mass ratio ion species (i.e. a hydrogen plasma). This provides new fundamental insight into the generation of γ-rays in extreme conditions and informs related experiments using multi-petawatt laser facilities.

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