Powerful, pulsed, THz radiation from laser accelerated relativistic electron bunches

Cs Tóth; J. Van Tilborg; C. G.R. Geddes; G. Fubiani; C. B. Schroeder; E. Esarey; J. Faure; G. Dugan; W. P. Leemans

doi:10.1117/12.548945

Powerful, pulsed, THz radiation from laser accelerated relativistic electron bunches

Cs Tóth
, J. Van Tilborg
, C. G.R. Geddes
, G. Fubiani
, C. B. Schroeder
, E. Esarey
, J. Faure
, G. Dugan
, W. P. Leemans

Research output: Contribution to journal › Conference article › peer-review

Abstract

Coherent THz radiation was produced from relativistic electron bunches of subpicosecond duration. The electron beam was produced by strongly focused (≈ 6 μm), high peak power (up to 10 TW), ultra-short (∼ 50 fs) laser pulses of a 10 Hz repetition rate Ti:sapphire chirped pulse amplification (CPA) laser system via self-modulated laser wakefield acceleration (SM-LWFA) in a high density (> 10¹⁹ cm^-3) pulsed gas jet. 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 yield in the 0.3 to 19 THz range and at 94 GHz has been measured and found to depend quadratically on the bunch charge. The measured total radiated energy in the THz range 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 applied as a useful tool for measuring the properties of laser accelerated bunches at the exit of the plasma accelerator.

Original language	English
Article number	54
Pages (from-to)	491-504
Number of pages	14
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5448
Issue number	PART 1
DOIs	https://doi.org/10.1117/12.548945
Publication status	Published - 1 Dec 2004
Event	High-Power Laser Ablation V - Taos, NM, United States Duration: 25 Apr 2004 → 30 Apr 2004

Keywords

Electron-acceleration
Laser-plasma
THz-emission
Transition radiation
Ultra-short
Ultrahigh-fields
Wakefield

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10.1117/12.548945

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@article{14a30084ac804408a3e7df92deed9ac7,

title = "Powerful, pulsed, THz radiation from laser accelerated relativistic electron bunches",

abstract = "Coherent THz radiation was produced from relativistic electron bunches of subpicosecond duration. The electron beam was produced by strongly focused (≈ 6 μm), high peak power (up to 10 TW), ultra-short (∼ 50 fs) laser pulses of a 10 Hz repetition rate Ti:sapphire chirped pulse amplification (CPA) laser system via self-modulated laser wakefield acceleration (SM-LWFA) in a high density (> 1019 cm-3) pulsed gas jet. 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 yield in the 0.3 to 19 THz range and at 94 GHz has been measured and found to depend quadratically on the bunch charge. The measured total radiated energy in the THz range 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 applied as a useful tool for measuring the properties of laser accelerated bunches at the exit of the plasma accelerator.",

keywords = "Electron-acceleration, Laser-plasma, THz-emission, Transition radiation, Ultra-short, Ultrahigh-fields, Wakefield",

author = "Cs T{\'o}th and \{Van Tilborg\}, J. and Geddes, \{C. G.R.\} and G. Fubiani and Schroeder, \{C. B.\} and E. Esarey and J. Faure and G. Dugan and Leemans, \{W. P.\}",

year = "2004",

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doi = "10.1117/12.548945",

language = "English",

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pages = "491--504",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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TY - JOUR

T1 - Powerful, pulsed, THz radiation from laser accelerated relativistic electron bunches

AU - Tóth, Cs

AU - Van Tilborg, J.

AU - Geddes, C. G.R.

AU - Fubiani, G.

AU - Schroeder, C. B.

AU - Esarey, E.

AU - Faure, J.

AU - Dugan, G.

AU - Leemans, W. P.

PY - 2004/12/1

Y1 - 2004/12/1

N2 - Coherent THz radiation was produced from relativistic electron bunches of subpicosecond duration. The electron beam was produced by strongly focused (≈ 6 μm), high peak power (up to 10 TW), ultra-short (∼ 50 fs) laser pulses of a 10 Hz repetition rate Ti:sapphire chirped pulse amplification (CPA) laser system via self-modulated laser wakefield acceleration (SM-LWFA) in a high density (> 1019 cm-3) pulsed gas jet. 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 yield in the 0.3 to 19 THz range and at 94 GHz has been measured and found to depend quadratically on the bunch charge. The measured total radiated energy in the THz range 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 applied as a useful tool for measuring the properties of laser accelerated bunches at the exit of the plasma accelerator.

AB - Coherent THz radiation was produced from relativistic electron bunches of subpicosecond duration. The electron beam was produced by strongly focused (≈ 6 μm), high peak power (up to 10 TW), ultra-short (∼ 50 fs) laser pulses of a 10 Hz repetition rate Ti:sapphire chirped pulse amplification (CPA) laser system via self-modulated laser wakefield acceleration (SM-LWFA) in a high density (> 1019 cm-3) pulsed gas jet. 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 yield in the 0.3 to 19 THz range and at 94 GHz has been measured and found to depend quadratically on the bunch charge. The measured total radiated energy in the THz range 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 applied as a useful tool for measuring the properties of laser accelerated bunches at the exit of the plasma accelerator.

KW - Electron-acceleration

KW - Laser-plasma

KW - THz-emission

KW - Transition radiation

KW - Ultra-short

KW - Ultrahigh-fields

KW - Wakefield

U2 - 10.1117/12.548945

DO - 10.1117/12.548945

M3 - Conference article

AN - SCOPUS:5044240251

SN - 0277-786X

VL - 5448

SP - 491

EP - 504

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

IS - PART 1

M1 - 54

T2 - High-Power Laser Ablation V

Y2 - 25 April 2004 through 30 April 2004

ER -

Powerful, pulsed, THz radiation from laser accelerated relativistic electron bunches

Abstract

Keywords

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