Cited by 111Laser-Plasma Interactions and DiagnosticsParticle Accelerators and Free-Electron LasersTerahertz technology and applications

Terahertz radiation from laser accelerated electron bunches

Open access
Leemans, W. P., van Tilborg, J., Faure, J., Geddes, C. G. R., Tóth, Cs., Schroeder, C. B., Esarey, E., Fubiani, G. +1 more·2004·Physics of Plasmas

Abstract

Coherent terahertz and millimeter wave radiation from laser accelerated electron bunches has been measured. The bunches were produced by tightly focusing (spot diameter ≈6 μm) a high peak power (up to 10 TW), ultra-short (⩾50 fs) laser pulse from a high repetition rate (10 Hz) laser system (0.8 μm), onto a high density (>1019 cm−3) pulsed gas jet of length ≈1.5 mm. As the electrons exit the plasma, coherent transition radiation is generated at the plasma-vacuum boundary for wavelengths long compared to the bunch length. Radiation in the 0.3–19 THz range and at 94 GHz has been measured and found to depend quadratically on the bunch charge. The measured radiated energy for two different collection angles is in good agreement with theory. Modeling indicates that optimization of this table-top source could provide more than 100 μJ/pulse. Together with intrinsic synchronization to the laser pulse, this will enable numerous applications requiring intense terahertz radiation. This radiation can also be used as a powerful tool for measuring the properties of laser accelerated bunches at the exit of the plasma accelerator. Preliminary spectral measurements indicates that bunches as short as 30–50 fs have been produced in these laser driven accelerators.

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Crossref · 10.1063/1.1652834

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  • Femtosecond bunches have been produced containing 2x10^9 electrons with geometric and normalized RMS emittances ε_x below 0.05 to 0.01 π-mm-mrad and below 1 to 2 π-mm-mrad RMS, respectively.

    “Femtosecond bunches have hence been produced 25 containing 2x10 9 electrons with geometric and normalized RMS emittances ε x below 0.05 to 0.01 π-mm-mrad and below 1 to 2 π-mm-mrad RMS, respectively.”

    From High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding (2004) · cites this paper as [25]

    The Abstract reports preliminary evidence of 30–50 fs bunches, and Radiation measurements reports bunches of about 0.3 nC, approximately 2×10^9 electrons. Electron beam properties estimates a geometric rms “emittance” of 0.01 mm-mrad, but cautions that a proper emittance value requires further measurements. It does not report the claimed normalized rms emittance below 1–2 π-mm-mrad; the normalized value it mentions is 3 mm-mrad from a similar setup. (LLM, conf=0.87)

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Cites

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Research works printed but not linked: 3

  1. E. Esarey, P. Sprangle, J. Krall, and A. Ting, IEEE Trans. Plasma Sci. 24, 252 ͑1996͒.
  2. E. Budiarto, J. Margolies, S. Jeong, J. Son, and J. Bokor, IEEE J. Quantum Electron. 32, 1839 ͑1996͒.
  3. G. Fubiani, G. Dugan, W. Leemans, E. Esarey, and J. L. Bobin, ''Semi- analytical 6d space charge model for dense electron bunches with large energy spreads,'' in Proceedings of the 2002 Advanced Accelerator Con- cepts Workshop, edited by C. E. Clayton and P. Muggli ͑American Insti- tute of Physics, Melville, NY, 2002͒, Vol. 647, pp. 203-212.

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Authors
Leemans, W. P., van Tilborg, J., Faure, J., Geddes, C. G. R., Tóth, C., Schroeder, C. B., Esarey, E., Fubiani, G., & Dugan, G.
Affiliations
  • Lawrence Berkeley National Laboratory (US)
  • Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720
  • Cornell University (US)
Venue
Physics of Plasmas
Published
2004-05-01
Volume
11
Issue
5
Pages
2899-2906
ISSN
  • 1070-664X (ISSN-L)
  • 1089-7674
OpenAlex
W1986991938
Cited by
111
References
26
Citations by year
2025: 1 · 2024: 6 · 2023: 4 · 2021: 2 · 2020: 2 · 2019: 6 · 2018: 2 · 2017: 8 · 2016: 6 · 2015: 7 · 2014: 3 · 2013: 4 · 2012: 7
FWCI
5.28
Type
journal article
Language
en
Open access
Locations
  • Physics of Plasmas (publishedVersion)
  • University of North Texas Digital Library (University of North Texas) (submittedVersion)
  • TU/e Research Portal (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • TU/e Research Portal (submittedVersion, other-oa)
Funders
  • U.S. Department of Energy (DE-AC03-?, DEAC03-76SF0098)
  • Hertz Foundation
Topics
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Laser-Plasma Interactions and Diagnostics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Particle Accelerators and Free-Electron Lasers
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
Keywords
terahertz radiation, coherent transition radiation, plasma-vacuum boundary, millimeter wave, high repetition rate lasers, ultrashort laser pulses, plasma accelerators, bunch length

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