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Title: Rapidly pulsed helium droplet source

Abstract

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.

Authors:
; ; ;  [1]; ; ; ;  [2]
  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)
Publication Date:
OSTI Identifier:
22053463
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 80; Journal Issue: 4; Other Information: (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Pentlehner, Dominik, Riechers, Ricarda, Dick, Bernhard, Slenczka, Alkwin, Even, Uzi, Lavie, Nachum, Brown, Raviv, and Luria, Kfir. Rapidly pulsed helium droplet source. United States: N. p., 2009. Web. doi:10.1063/1.3117196.
Pentlehner, Dominik, Riechers, Ricarda, Dick, Bernhard, Slenczka, Alkwin, Even, Uzi, Lavie, Nachum, Brown, Raviv, & Luria, Kfir. Rapidly pulsed helium droplet source. United States. https://doi.org/10.1063/1.3117196
Pentlehner, Dominik, Riechers, Ricarda, Dick, Bernhard, Slenczka, Alkwin, Even, Uzi, Lavie, Nachum, Brown, Raviv, and Luria, Kfir. 2009. "Rapidly pulsed helium droplet source". United States. https://doi.org/10.1063/1.3117196.
@article{osti_22053463,
title = {Rapidly pulsed helium droplet source},
author = {Pentlehner, Dominik and Riechers, Ricarda and Dick, Bernhard and Slenczka, Alkwin and Even, Uzi and Lavie, Nachum and Brown, Raviv and Luria, Kfir},
abstractNote = {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.},
doi = {10.1063/1.3117196},
url = {https://www.osti.gov/biblio/22053463}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 4,
volume = 80,
place = {United States},
year = {Wed Apr 15 00:00:00 EDT 2009},
month = {Wed Apr 15 00:00:00 EDT 2009}
}