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Spark discharge coupled laser multicharged ion source.

Md Haider A Shaim1, Hani E Elsayed-Ali1

  • 1Department of Electrical and Computer Engineering and the Applied Research Center, Old Dominion University, Norfolk, Virginia 23529, USA.

The Review of Scientific Instruments
|August 3, 2015
PubMed
Summary
This summary is machine-generated.

Coupling a spark discharge to a laser ion source significantly enhances multicharged ion generation and charge states. This method boosts ion yield without increasing target ablation, enabling efficient ion production with lower laser energy.

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Area of Science:

  • Plasma Physics
  • Atomic and Molecular Physics
  • Ion Source Technology

Background:

  • Laser-produced plasmas are used for generating multicharged ions.
  • Enhancing ion yield and charge states from laser ion sources is crucial for applications.
  • Current methods may require high laser energy or cause significant target ablation.

Purpose of the Study:

  • To investigate the effect of spark discharge coupling on laser multicharged ion source performance.
  • To determine the enhancement in multicharged ion generation and charge states.
  • To assess the impact on target ablation and laser energy requirements.

Main Methods:

  • A spark discharge system was coupled to a laser multicharged ion source.
  • Electrodes were positioned in front of the laser-ablated target.
  • Aluminum targets were used with a Nd:YAG laser.
  • Ion yield and charge states were measured using a Faraday cup.
  • Spark discharge parameters (capacitance, voltage) were varied.

Main Results:

  • Spark discharge significantly enhanced multicharged ion generation by up to a factor of ~9.
  • Higher charge states were observed, reaching Al(6+) compared to Al(3+) with laser alone.
  • Charge amplification by a factor of ~13 was achieved with reduced laser energy (45 mJ).
  • Increased ion generation occurred without a corresponding increase in target ablation.

Conclusions:

  • Coupling spark discharge to a laser ion source is an effective method for enhancing multicharged ion production.
  • This technique allows for higher ion yields and charge states at lower laser energies.
  • The spark discharge amplification stage offers a promising approach for efficient and less damaging ion generation.