Iron plasma generation using a Nd:YAG laser pulse of several hundred picoseconds

Journal Article · Mon Feb 15 04:00:00 EST 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4938258· OSTI ID:22482920

Tamura, Jun ^[1]; Kumaki, Masafumi ^[2]; Kondo, Kotaro ^[3]; Kanesue, Takeshi; Okamura, Masahiro ^[4]

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1. J-PARC Center, Japan Atomic Energy Agency, Ibaraki 319-1195 (Japan)
2. Research Institute for Science and Engineering, Waseda University, Tokyo 169-8555 (Japan)
3. Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Tokyo 152-8550 (Japan)
4. Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)

We investigated the high intensity plasma generated by using a Nd:YAG laser to apply a laser-produced plasma to the direct plasma injection scheme. The capability of the source to generate high charge state ions strongly depends on the power density of the laser irradiation. Therefore, we focused on using a higher power laser with several hundred picoseconds of pulse width. The iron target was irradiated with the pulsed laser, and the ion current of the laser-produced iron plasma was measured using a Faraday cup and the charge state distribution was investigated using an electrostatic ion analyzer. We found that higher charge state iron ions (up to Fe{sup 21+}) were obtained using a laser pulse of several hundred picoseconds in comparison to those obtained using a laser pulse of several nanoseconds (up to Fe{sup 19+}). We also found that when the laser irradiation area was relatively large, the laser power was absorbed mainly by the contamination on the target surface.

• OSTI ID: 22482920
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 87; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CHARGE STATES
FARADAY CUPS
IRON IONS
LASER RADIATION
LASER-PRODUCED PLASMA
NEODYMIUM LASERS
POWER DENSITY
PULSES
SURFACES