Nonuniform discharge currents in active plasma lenses

doi:10.1103/PhysRevAccelBeams.20.032803

Title: Nonuniform discharge currents in active plasma lenses

Abstract

Active plasma lenses have attracted interest in novel accelerator applications due to their ability to provide large-field-gradient (short focal length), tunable, and radially symmetric focusing for charged particle beams. However, if the discharge current is not flowing uniformly as a function of radius, one can expect a radially varying field gradient as well as potential emittance degradation. We have investigated this experimentally for a 1-mm-diameter active plasma lens. The measured near-axis field gradient is approximately 35% larger than expected for a uniform current distribution, and at overfocusing currents ring-shaped electron beams are observed. These observations are explained by simulations.

Authors:: van Tilborg, J.; Barber, S. K.; Tsai, H. -E.; Swanson, K. K.; Steinke, S.; Geddes, C. G. R.; Gonsalves, A. J.; Schroeder, C. B.; Esarey, E.; Bulanov, S. S.; Bobrova, N. A.; Sasorov, P. V.; Leemans, W. P.

Publication Date:: 2017-03-24

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1348281

Alternate Identifier(s):: OSTI ID: 1439217

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Published Article

Journal Name:: Physical Review Accelerators and Beams

Additional Journal Information:: Journal Name: Physical Review Accelerators and Beams Journal Volume: 20 Journal Issue: 3; Journal ID: ISSN 2469-9888

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS

Citation Formats


                    van Tilborg, J., Barber, S. K., Tsai, H. -E., Swanson, K. K., Steinke, S., Geddes, C. G. R., Gonsalves, A. J., Schroeder, C. B., Esarey, E., Bulanov, S. S., Bobrova, N. A., Sasorov, P. V., and Leemans, W. P. Nonuniform discharge currents in active plasma lenses.  United States: N. p., 2017. 
        Web.  doi:10.1103/PhysRevAccelBeams.20.032803.

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                    van Tilborg, J., Barber, S. K., Tsai, H. -E., Swanson, K. K., Steinke, S., Geddes, C. G. R., Gonsalves, A. J., Schroeder, C. B., Esarey, E., Bulanov, S. S., Bobrova, N. A., Sasorov, P. V., & Leemans, W. P. Nonuniform discharge currents in active plasma lenses.  United States.  doi:10.1103/PhysRevAccelBeams.20.032803.

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                    van Tilborg, J., Barber, S. K., Tsai, H. -E., Swanson, K. K., Steinke, S., Geddes, C. G. R., Gonsalves, A. J., Schroeder, C. B., Esarey, E., Bulanov, S. S., Bobrova, N. A., Sasorov, P. V., and Leemans, W. P. Fri .  
        "Nonuniform discharge currents in active plasma lenses".  United States.  doi:10.1103/PhysRevAccelBeams.20.032803.

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@article{osti_1348281,

  title        = {Nonuniform discharge currents in active plasma lenses},

  author       = {van Tilborg, J. and Barber, S. K. and Tsai, H. -E. and Swanson, K. K. and Steinke, S. and Geddes, C. G. R. and Gonsalves, A. J. and Schroeder, C. B. and Esarey, E. and Bulanov, S. S. and Bobrova, N. A. and Sasorov, P. V. and Leemans, W. P.},

  abstractNote = {Active plasma lenses have attracted interest in novel accelerator applications due to their ability to provide large-field-gradient (short focal length), tunable, and radially symmetric focusing for charged particle beams. However, if the discharge current is not flowing uniformly as a function of radius, one can expect a radially varying field gradient as well as potential emittance degradation. We have investigated this experimentally for a 1-mm-diameter active plasma lens. The measured near-axis field gradient is approximately 35% larger than expected for a uniform current distribution, and at overfocusing currents ring-shaped electron beams are observed. These observations are explained by simulations.},

  doi          = {10.1103/PhysRevAccelBeams.20.032803},

  journal      = {Physical Review Accelerators and Beams},

  number       = 3,

  volume       = 20,

  place        = {United States},

  year         = {2017},

  month        = {3}

}

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DOI: 10.1103/PhysRevAccelBeams.20.032803

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Cited by: 13 works

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Figures / Tables:

FIG. 1.: MHD simulations of a 1-mm-diameter plasma lens yield the radial distribution of (a) the electron temperature and plasma density, (b) the transverse current density, and (c) the magnetic field profile. A simplified model was proposed (plotted as solid blue curves), based on J(r) ∝ T_e(r)^3/2, with T_e(r) ∝more »

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Similar Records

Title: Nonuniform discharge currents in active plasma lenses

Abstract

Citation Formats

Figures / Tables:

High-Resolution γ -Ray Radiography Produced by a Laser-Plasma Driven Electron Source journal, January 2005

z -pinch plasma lens focusing of a heavy-ion beam journal, April 1991

Broadband single-shot electron spectrometer for GeV-class laser-plasma-based accelerators journal, May 2008

Guiding of 35 TW laser pulses in ablative capillary discharge waveguides journal, November 2009

The ultimate speed of magnetic switching in granular recording media journal, April 2004

Imaging laser-wakefield-accelerated electrons using miniature magnetic quadrupole lenses journal, May 2011

Monoenergetic beams of relativistic electrons from intense laser–plasma interactions journal, September 2004

Investigation of a hydrogen plasma waveguide journal, December 2000

Multi-GeV Electron Beams from Capillary-Discharge-Guided Subpetawatt Laser Pulses in the Self-Trapping Regime journal, December 2014

Electron diffraction using ultrafast electron bunches from a laser-wakefield accelerator at kHz repetition rate journal, February 2013

A Z-Pinch Plasma Lens for Focusing High-Energy Particles in an Accelerator journal, January 1987

Quasi-monoenergetic and tunable X-rays from a laser-driven Compton light source journal, November 2013

Enhancement of Electron Energy to the Multi-GeV Regime by a Dual-Stage Laser-Wakefield Accelerator Pumped by Petawatt Laser Pulses journal, October 2013

Adjustable, short focal length permanent-magnet quadrupole based electron beam final focus system journal, July 2005

Demonstration of a high repetition rate capillary discharge waveguide journal, January 2016

Quasi-monoenergetic femtosecond photon sources from Thomson Scattering using laser plasma accelerators and plasma channels journal, November 2014

Active Plasma Lensing for Relativistic Laser-Plasma-Accelerated Electron Beams journal, October 2015

Demonstration Scheme for a Laser-Plasma-Driven Free-Electron Laser journal, September 2012

Compact X-ray Free-Electron Laser from a Laser-Plasma Accelerator Using a Transverse-Gradient Undulator journal, November 2012

MeV-Energy X Rays from Inverse Compton Scattering with Laser-Wakefield Accelerated Electrons journal, April 2013

Simulations of a hydrogen-filled capillary discharge waveguide journal, December 2001

A laser–plasma accelerator producing monoenergetic electron beams journal, September 2004

High-Brightness High-Energy Electron Beams from a Laser Wakefield Accelerator via Energy Chirp Control journal, September 2016

GeV electron beams from a centimetre-scale accelerator journal, September 2006

High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding journal, September 2004

Laser-driven plasma-wave electron accelerators journal, March 2009

Dynamics of a z pinch for focusing high‐energy charged particles journal, November 1987

Physics of laser-driven plasma-based electron accelerators journal, August 2009

Formation of hollow heavy ion beams in plasma lens journal, December 2010

Multistage coupling of independent laser-plasma accelerators journal, February 2016

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Towards a free electron laser based on laser plasma accelerators journal, November 2014

High-Resolution $γ$ -Ray Radiography Produced by a Laser-Plasma Driven Electron Source
journal, January 2005

z -pinch plasma lens focusing of a heavy-ion beam
journal, April 1991

Broadband single-shot electron spectrometer for GeV-class laser-plasma-based accelerators
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Guiding of 35 TW laser pulses in ablative capillary discharge waveguides
journal, November 2009

The ultimate speed of magnetic switching in granular recording media
journal, April 2004

Imaging laser-wakefield-accelerated electrons using miniature magnetic quadrupole lenses
journal, May 2011

Monoenergetic beams of relativistic electrons from intense laser–plasma interactions
journal, September 2004

Investigation of a hydrogen plasma waveguide
journal, December 2000

Multi-GeV Electron Beams from Capillary-Discharge-Guided Subpetawatt Laser Pulses in the Self-Trapping Regime
journal, December 2014

Electron diffraction using ultrafast electron bunches from a laser-wakefield accelerator at kHz repetition rate
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A Z-Pinch Plasma Lens for Focusing High-Energy Particles in an Accelerator
journal, January 1987

Quasi-monoenergetic and tunable X-rays from a laser-driven Compton light source
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