Intense pulsed helium droplet beams

Abstract

Pulsed (30 - 100 microseconds) nozzle beams have been used to generate helium droplets (<N> = 10^4-10^5). The dependence of the beam intensity and the mean droplet size on the source stagnation pressure and temperature are studied via mass spectroscopy and laser induced fluorescence of embedded phthalocyanine molecules. In comparison to a cw beam the pulsed source for the same pressure and temperature has a factor of 100 higher flux and the droplet sizes are an order of a magnitude larger.

Accepted by Review of Scientific Instruments

References in corpus (2)

• Helium nanodroplet isolation ro-vibrational spectroscopy: methods and recent results
• Helium nanodroplets and trapped Bose-Einstein condensates as prototypes of finite quantum fluids

Cited by in corpus (5)

• Spectroscopy and dynamics in helium nanodroplets
• Photoionizaton of Pure and Doped Helium Nanodroplets
• Catching proteins in liquid helium droplets
• Spectroscopy of free radicals and radical containing entrance-channel complexes in superfluid helium nano-droplets
• Thomson scattering from near-solid density plasmas using soft x-ray free electron lasers