Analysis of laser wavelength and energy dependences of the impulse in a magnetic thrust chamber system for a laser fusion rocket

Akihiro Maeno, Naoji Yamamoto, Shinsuke Fujioka, Yoshitaka Mori, Atsushi Sunahara, Tomoyuki Johzaki, Hideki Nakashima

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Experiments using a pendulum thrust stand are performed to determine the dependences of the impulse on the laser wavelength and energy in a magnetic thrust chamber system for a laser fusion rocket. The impulse is generated by the interaction between a diamagnetic current in a laser-produced plasma and a magnetic field. The plasma is produced by irradiating a spherical polyacetal target with a single-beam glass laser (laser pulse duration: 1.3 ns; laser wavelengths: 1,053, 527 and 351 nm; laser energy: 30-900 J). The magnetic field is generated by a cylindrical neodymium permanent magnet (50mm diameter and 40mm long) placed in a position 33mm from the target. Impulses in the range 0.02- 10 mNs are measured using a pendulum thrust stand. The experiments reveal that the impulse for 2ω is similar to that for 3ω, and is larger than that for ω.

Original languageEnglish
Pages (from-to)170-172
Number of pages3
JournalTransactions of the Japan Society for Aeronautical and Space Sciences
Volume56
Issue number3
DOIs
Publication statusPublished - May 1 2013

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thrust chambers
Laser fusion
laser fusion
Rockets
rockets
impulses
thrust
laser
Pendulums
wavelength
Wavelength
Lasers
pendulums
Acetal resins
wavelengths
Magnetic fields
lasers
Laser produced plasmas
energy
Glass lasers

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science

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Analysis of laser wavelength and energy dependences of the impulse in a magnetic thrust chamber system for a laser fusion rocket. / Maeno, Akihiro; Yamamoto, Naoji; Fujioka, Shinsuke; Mori, Yoshitaka; Sunahara, Atsushi; Johzaki, Tomoyuki; Nakashima, Hideki.

In: Transactions of the Japan Society for Aeronautical and Space Sciences, Vol. 56, No. 3, 01.05.2013, p. 170-172.

Research output: Contribution to journalArticle

Maeno, Akihiro ; Yamamoto, Naoji ; Fujioka, Shinsuke ; Mori, Yoshitaka ; Sunahara, Atsushi ; Johzaki, Tomoyuki ; Nakashima, Hideki. / Analysis of laser wavelength and energy dependences of the impulse in a magnetic thrust chamber system for a laser fusion rocket. In: Transactions of the Japan Society for Aeronautical and Space Sciences. 2013 ; Vol. 56, No. 3. pp. 170-172.
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