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We present a novel application of lasers for removing particle deposits on inaccessible optical windows. The particular example arises with respect to cryostats filled with liquid helium. We explain the observation in terms of the radiation force acting on the adhering particles. We estimate the radiation forces to be much larger than all other forces acting on the particle.
author list (cited authors)
Karpetis, A. N., White, C. M., & Sreenivasan, K. R.