Strong Shock Waves

Shock waves traveling at speeds in excess of ${10}^8$ cm/sec (Mach number ≥ 1000) in deuterium gas at 50 mTorr and room temperature ($n_1=1.3\mathrm{}\times {10}^{15}$ ${\mathrm{cm}}^{-3\mathrm{}}$) have been created in a 3-m-long, electromagnetically driven coaxial shock tube, and neutrons have been observed.