Rapidly pulsed helium droplet source

Journal Article · Wed Apr 15 00:00:00 EDT 2009 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3117196· OSTI ID:22053463

Pentlehner, Dominik; Riechers, Ricarda; Dick, Bernhard; Slenczka, Alkwin ^[1]; Even, Uzi; Lavie, Nachum; Brown, Raviv; Luria, Kfir ^[2]

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1. Institute for Physical and Theoretical Chemistry, University of Regensburg, 93053 Regensburg (Germany)
2. Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Ramat Aviv, 69978 Tel Aviv (Israel)

A pulsed valve connected to a closed-cycle cryostat was optimized for producing helium droplets. The pulsed droplet beam appeared with a bimodal size distribution. The leading part of the pulse consists of droplets suitable for doping with molecules. The average size of this part can be varied between 10{sup 4} and 10{sup 6} helium atoms, and the width of the distribution is smaller as compared to a continuous-flow droplet source. The system has been tested in a single pulse mode and at repetition rates of up to 500 Hz with almost constant intensity. The droplet density was found to be increased by more than an order of magnitude as compared to a continuous-flow droplet source.

• OSTI ID: 22053463
• Journal Information: Review of Scientific Instruments, Vol. 80, Issue 4; Other Information: (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CRYOSTATS
DENSITY
DISTRIBUTION
DROPLETS
HELIUM
MOLECULES
PARTICLE BEAMS
PULSES
VALVES