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Proton generation from hydrocarbon polymer targets for laser ion source.
Kazumasa Takahashi1, Yuki Matsumoto1, Masayuki Kuzumoto1
1Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan.
The Review of Scientific Instruments
|January 3, 2020
Summary
Researchers demonstrated proton beam generation using laser ion sources with hydrocarbon polymers like polyethylene. Increasing laser intensity effectively boosts proton particle yield, showing similar results across different polymer targets.
Area of Science:
- Plasma Physics
- Laser-Matter Interaction
- Ion Beam Generation
Background:
- Laser ion sources offer intense pulsed ion beams from solid targets.
- Generating proton beams necessitates hydrogen-containing compound targets.
Purpose of the Study:
- To demonstrate proton generation from various hydrocarbon polymer targets using a laser ion source.
- To investigate the effect of laser intensity on proton particle yield.
Main Methods:
- Utilized a Nd:YAG laser (532 nm/17 ns, 0.2 J) to irradiate polyethylene, polypropylene, and polystyrene targets.
- Measured ion current and species fraction using a Faraday cup and electrostatic ion analyzer.
Main Results:
- Similar peak proton currents and fractions were observed across polyethylene, polypropylene, and polystyrene targets.
- Higher laser intensity significantly increased the number of proton particles and total charge.
Conclusions:
- Hydrocarbon polymers are effective targets for laser-driven proton beam generation.
- Laser intensity is a critical parameter for optimizing proton yield in laser ion sources.
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