Affiliations: [a] School of Equipment Engineering, Shenyang Ligong
University, Shenyang, Liaoning, China | [b] State Key Laboratory of Explosion Science and
Technology, Beijing Institute of Technology, Beijing, China
Abstract: To investigate light flash produced during hypervelocity impact in
the laboratory, we have conducted a series of experiments on a two-stage light
gas gun at different impact velocities and the same impact angle. Light flash
were acquired through optical fiber pyrometer measurement system during the
whole physical process in hypervelocity impact, Experimental results showed
that the maximum light flash intensity decreases with impact velocity
increasing, and maximum light flash intensity should exist a critical impact
velocity for polycarbonate projectile impacting natural dolomite plate, which
may be between 2.52 km/s and 4.21 km/s at the wavelength of 550 nm–700 nm. In
addition, the light flash intensity peak value was 0.4 ∼ 0.5 mW.cm^{-2}.nm^{-1} in the
experimental conditions in the paper.
