  Emission of muonium ($\mu^+e^-$) atoms from a laser-processed aerogel surface
into vacuum was studied for the first time. Laser ablation was used to create
hole-like regions with diameter of about 270$~\mu$m in a triangular pattern
with hole separation in the range of 300--500$~\mu$m. The emission probability
for the laser-processed aerogel sample is at least eight times higher than for
a uniform one.

Instrumentation and Detectors;High Energy Physics - Experiment;Atomic Physics