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Related Experiment Videos

Ultralow emittance, multi-MeV proton beams from a laser virtual-cathode plasma accelerator.

T E Cowan1, J Fuchs, H Ruhl

  • 1General Atomics, San Diego, California 92121, USA.

Physical Review Letters
|June 1, 2004
PubMed
Summary

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High-current, multi-MeV proton beams generated by lasers exhibit remarkable laminarity. These laser-driven beams show significantly lower emittance than conventional accelerator beams, paving the way for advanced applications.

Area of Science:

  • Plasma Physics
  • Particle Acceleration
  • Laser-Matter Interactions

Background:

  • Conventional accelerators face limitations in producing high-quality, high-current beams.
  • Ultraintense lasers offer a novel approach to particle acceleration.
  • Understanding beam quality is crucial for applications in various scientific fields.

Purpose of the Study:

  • To measure the laminarity of high-current multi-MeV proton beams produced by laser-irradiated metallic foils.
  • To compare the emittance of these laser-driven proton beams with those from conventional accelerators.
  • To identify factors limiting the beam laminarity.

Main Methods:

  • Production of proton beams using ultraintense laser irradiation of thin metallic foils.
  • Measurement of transverse and longitudinal emittance for proton energies >10 MeV.

Related Experiment Videos

  • Characterization of the ion beam source size.

    • Main Results:

    • Proton beams with energies >10 MeV demonstrated exceptional laminarity.
    • Transverse emittance <0.004 mm mrad and longitudinal emittance <10(-4) eV s were achieved.
    • Beam emittance was found to be 100- to 10,000-fold better than conventional accelerator beams.
    • Ion beam source size was measured to be <15 microm (FWHM).

    Conclusions:

    • Laser-driven proton acceleration produces highly laminar beams with ultra-low emittance.
    • Collisions with fast electrons appear to be the primary limitation to beam laminarity.
    • These findings highlight the potential of laser-based accelerators for generating high-quality particle beams.