title: Energetic cavitation collapse generates 3.2 Mbar plasma with a 1.4 J driver.
abstract: A tabletop device uses 1.4 J to drive the symmetric collapse of a 1.8 mm radius vapor bubble in water at 22 bar. Single shot streak imaging reveals a stagnation plasma of 28 micron radius at over 12,000 K and an unprecedented pressure of 3.2 Mbar. Compared to sonoluminescence, the most commonly studied cavitation mechanism, this event is greater by factors of 30-40 in size, 1,000,000 in energy, and 100 in stagnation pressure. This regime of high energy density has previously been accessible only in massive facilities with very low repetition rates.
authors.affiliation: Department of Mechanical Engineering, Vanderbilt University, VU Station B #351592, 2301 Vanderbilt Place, Nashville, Tennessee 37235-1592, USA.
authors.forename: Marc C
authors.initials: MC
authors.lastname: Ramsey
authors.affiliation: Department of Mechanical Engineering, Vanderbilt University, VU Station B #351592, 2301 Vanderbilt Place, Nashville, Tennessee 37235-1592, USA.
authors.forename: Robert W
authors.initials: RW
authors.lastname: Pitz