Analysis of Laser Wavelength and Energy Dependences of the Impulse in a Magnetic Thrust Chamber System for a Laser Fusion Rocket

作者：Maeno Akihiro^*; Yamamoto Naoji; Fujioka Shinsuke; Mori Yoshitaka; Sunahara Atsushi; Johzaki Tomoyuki; Nakashima Hideki

来源：Transactions of the Japan Society for Aeronautical and Space Sciences, 2013, 56(3): 170-172.

DOI：10.2322/tjsass.56.170

• Propulsion
• Laser-Produced Plasma
• Magnetic Thrust Chamber System
• Laser Fusion Rocket

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 (50 mm diameter and 40 mm long) placed in a position 33 mm 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 2 omega is similar to that for 3 omega, and is larger than that for omega.

• 出版日期2013-5