Abstract

Holographic methods have been proposed to record bubble tracks of high-energy particles in large bubble chambers like the one at Fermi National Accelerator Lab.¹ It has been shown that the high-power densities of standard Q-switched laser pulses Induce parasitic boiling in the chamber liquid which blurs the hologram.² Rectangular stretched light pulses of 1–5-μs duration are needed to provide the required beam energy but at significantly reduced power densities. Apparently, reproducible spikefree rectangular laser pulses of >0.5 μs have not been achieved before, although attempts have been made by several groups.³

© 1988 Optical Society of America