Velocity distributions in a gas-gun microparticle accelerator

BARRIOS, SIRIA; LANCE, PEDRO; ABATE, ANABELLA A.; PRIETO, GERMAN; GARCÍA, NICOLÁS A.; PIQUERAS, CRISTIAN M.; VEGA, DANIEL A.; SATTI, ANGEL; GÓMEZ, LEOPOLDO R.

REVIEW OF SCIENTIFIC INSTRUMENTS

AMER INST PHYSICS

Año: 2022 vol. 93

0034-6748

Here, we build and characterize a single-stage gas-gun microparticle accelerator, where a pressurized gas expands and launches particles on atarget. The microparticles in the range of 60–250 μm are accelerated by the expansion of pressurized nitrogen. By using a high-speed camera,we study how the velocity distribution of accelerated particles is modified by particle size, pressure in the gas reservoir, valve’s opening time,and diaphragm’s thickness and composition. We employ this microparticle accelerator to study the impact of glass particles with diametersof (69 ± 6) μm accelerated at moderate velocities ∼ (10–25) m/s, using films of poly-dimethylsiloxane as targets.