Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p31a1387k&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #P31A-1387
Physics
5405 Atmospheres (0343, 1060), 5420 Impact Phenomena, Cratering (6022, 8136), 6022 Impact Phenomena (5420, 8136)
Scientific paper
We accelerate glass and aluminium spheres with a size of 0.1 - 0.4 mm to a velocity higher than 10 km/s using a high-power laser, GEKKO XII - HIPER at Institute of Laser Engineering, Osaka University. Using an x- ray backlight system, in which we observe the projectiles in a shadow of intense x-ray, we can estimate the velocity of projectiles by a streak camera. Also, using this system, their shape can be observed by a framing camera. The projectiles are finally collided to LiF targets. It is expected that LiF does not vaporize with an impact velocity lower than 10 km/s. We observe some lines of Li when a glass projectile collide LiF at ~ 20 km/s, using a time-resolved spectrometer after an estimated impact time. This is the first observation of the impact vaporization with a higher velocity than 10 km/s.
Fujioka Shinsuke
Fujiwara Takanori
Hironaka Yoichiro
Kadono Toshihiko
Kurosawa Kiichi
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