Rapidly pulsed helium droplet source

Review of Scientific Instruments - Tập 80 Số 4 - 2009
Dominik Pentlehner1, Ricarda Riechers1, Bernhard Dick1, Alkwin Slenczka1, U. Even2, N. Lavie2, Raviv Brown2, Kfir Luria2
1University of Regensburg 1 Institute for Physical and Theoretical Chemistry, , 93053 Regensburg, Germany
2Tel Aviv University 2 Sackler Faculty of Exact Sciences, School of Chemistry, , Ramat Aviv, 69978 Tel Aviv, Israel

Tóm tắt

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 104 and 106 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.

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Review of Scientific Instruments

Tập 80 Số 4

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