Hannover 2016 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 8: Experimental Techniques
MO 8.3: Vortrag
Dienstag, 1. März 2016, 11:30–11:45, f142
Piezo-electric detection of a pulsed supersonic beam — •Wolfgang Christen1, Paul Saftien1, and Karsten Lange2 — 1Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Str. 2, 12489 Berlin — 2Sensor- und Lasertechnik, Schulstr. 15, 15366 Neuenhagen
Supersonic molecular beams obtained by the adiabatic expansion of a gas under high pressure into vacuum constitute a powerful and versatile technique in modern physics, with applications in analytical chemistry, cluster science, metrology, optical spectroscopy, quantum physics, and surface science. Accordingly, various techniques have been developed for beam detection, with each method providing characteristic features.
Here we report on the development of a piezo-electric based detection of pulsed supersonic beams in an ultrahigh vacuum environment. Key benefits of this technique are a fast detector response and the fact that no ionisation is required. Besides characteristic features of the detection we present first experimental results for supersonic beams of helium, argon, and carbon dioxide, in a wide range of source conditions (source pressures between 5 and 120 bar, source temperatures between −40 and 110 ∘C).