Electron bunch length measurements from laser-accelerated electrons using single-shot THz time-domain interferometry

A. Debus, M. Bussman, Ulrich Schramm, R. Sauerbrey, C.D. Murphy, Zs. Major, R. Hörlein, L. Veisz, Jordan Gerard Gallacher, D.A. Jaroszynski

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

Laser-plasma wakefield-based electron accelerators are expected to deliver ultrashort electron bunches with unprecedented peak currents. However, their actual pulse duration has never been directly measured in a single-shot experiment. We present measurements of the ultrashort duration of such electron bunches by means of THz time-domain interferometry. With data obtained using a 0.5 J, 45 fs, 800 nm laser and a ZnTe-based electro-optical setup, we demonstrate the duration of laser-accelerated, quasimonoenergetic electron bunches [best fit of 32 fs (FWHM) with a 90% upper confidence level of 38 fs] to be shorter than the drive laser pulse, but similar to the plasma period.
LanguageEnglish
Article number084802
Number of pages4
JournalPhysical Review Letters
Volume104
Issue number8
DOIs
Publication statusPublished - 26 Feb 2010

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shot
interferometry
lasers
electrons
electron accelerators
laser plasmas
confidence
pulse duration
pulses

Keywords

  • wakefield accelerator
  • plasma interactions
  • beams
  • radiation
  • pulses

Cite this

Debus, A. ; Bussman, M. ; Schramm, Ulrich ; Sauerbrey, R. ; Murphy, C.D. ; Major, Zs. ; Hörlein, R. ; Veisz, L. ; Gallacher, Jordan Gerard ; Jaroszynski, D.A. / Electron bunch length measurements from laser-accelerated electrons using single-shot THz time-domain interferometry. In: Physical Review Letters. 2010 ; Vol. 104, No. 8.
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Debus, A, Bussman, M, Schramm, U, Sauerbrey, R, Murphy, CD, Major, Z, Hörlein, R, Veisz, L, Gallacher, JG & Jaroszynski, DA 2010, 'Electron bunch length measurements from laser-accelerated electrons using single-shot THz time-domain interferometry' Physical Review Letters, vol. 104, no. 8, 084802 . https://doi.org/10.1103/PhysRevLett.104.084802

Electron bunch length measurements from laser-accelerated electrons using single-shot THz time-domain interferometry. / Debus, A.; Bussman, M.; Schramm, Ulrich; Sauerbrey, R.; Murphy, C.D.; Major, Zs.; Hörlein, R.; Veisz, L.; Gallacher, Jordan Gerard; Jaroszynski, D.A.

In: Physical Review Letters, Vol. 104, No. 8, 084802 , 26.02.2010.

Research output: Contribution to journalArticle

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T1 - Electron bunch length measurements from laser-accelerated electrons using single-shot THz time-domain interferometry

AU - Debus, A.

AU - Bussman, M.

AU - Schramm, Ulrich

AU - Sauerbrey, R.

AU - Murphy, C.D.

AU - Major, Zs.

AU - Hörlein, R.

AU - Veisz, L.

AU - Gallacher, Jordan Gerard

AU - Jaroszynski, D.A.

N1 - Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.

PY - 2010/2/26

Y1 - 2010/2/26

N2 - Laser-plasma wakefield-based electron accelerators are expected to deliver ultrashort electron bunches with unprecedented peak currents. However, their actual pulse duration has never been directly measured in a single-shot experiment. We present measurements of the ultrashort duration of such electron bunches by means of THz time-domain interferometry. With data obtained using a 0.5 J, 45 fs, 800 nm laser and a ZnTe-based electro-optical setup, we demonstrate the duration of laser-accelerated, quasimonoenergetic electron bunches [best fit of 32 fs (FWHM) with a 90% upper confidence level of 38 fs] to be shorter than the drive laser pulse, but similar to the plasma period.

AB - Laser-plasma wakefield-based electron accelerators are expected to deliver ultrashort electron bunches with unprecedented peak currents. However, their actual pulse duration has never been directly measured in a single-shot experiment. We present measurements of the ultrashort duration of such electron bunches by means of THz time-domain interferometry. With data obtained using a 0.5 J, 45 fs, 800 nm laser and a ZnTe-based electro-optical setup, we demonstrate the duration of laser-accelerated, quasimonoenergetic electron bunches [best fit of 32 fs (FWHM) with a 90% upper confidence level of 38 fs] to be shorter than the drive laser pulse, but similar to the plasma period.

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