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Note: A pulsed laser ion source for linear induction accelerators.

H Zhang1, K Zhang1, Y Shen1

  • 1Institute of Fluid Physics, China Academy of Engineering Physics, P.O. Box 919-106, Mianyang 621900, China.

The Review of Scientific Instruments
|February 2, 2015
PubMed
Summary
This summary is machine-generated.

A novel high-current laser ion source was developed for induction accelerators, producing over 10(12) copper ions per pulse with a low-intensity laser. This advancement enables efficient generation of high-current ion beams for accelerator applications.

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Area of Science:

  • Plasma Physics
  • Accelerator Technology
  • Laser-Material Interactions

Background:

  • Induction accelerators require high-current ion sources for efficient operation.
  • Existing ion sources may face limitations in current density or beam quality.
  • Laser-produced plasmas offer a versatile method for ion generation.

Purpose of the Study:

  • To develop and characterize a high-current laser ion source for induction accelerators.
  • To investigate the generation of copper ions using a frequency-quadrupled Nd:YAG laser.
  • To evaluate the performance of the ion source in terms of ion yield, beam current density, and emittance.

Main Methods:

  • Irradiation of a copper target with a 266 nm Nd:YAG laser at intensities of 10(8) W/cm(2).
  • Observation of plasma emission spectra to determine electron temperature (approx. 1 eV).
  • Extraction of ion beams using an induction voltage adder from a plasma-prefilled gap.
  • Measurement of normalized beam emittance using a pepper-pot method.

Main Results:

  • Generation of a large number of Cu(+) ions (∼10(12) ions/pulse) with a duration of several microseconds.
  • Extraction of high-current ion beams exceeding 0.5 A/cm(2).
  • Achieved normalized beam emittance smaller than 1 π mm mrad.

Conclusions:

  • The developed laser ion source is effective in producing high-current ion beams suitable for induction accelerators.
  • The source demonstrates high ion yield and excellent beam quality (low emittance).
  • This technology represents a significant advancement for particle accelerator applications.