The Geyser effect in the expansion of solid helium into vacuum
| Autor: | P. Nieto, Giorgio Benedek, J. P. Toennies |
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| Přispěvatelé: | Benedek, G, Nieto, P, Toennies, J |
| Rok vydání: | 2010 |
| Předmět: |
Materials science
solid vacuum expansion Flow (psychology) Solid helium Orifice plate Thermodynamics chemistry.chemical_element Pressure regulator Mechanics Condensed Matter Physics quantum solid Electronic Optical and Magnetic Materials Chamber pressure Pulse (physics) law.invention Physics::Fluid Dynamics chemistry law Spark plug FIS/03 - FISICA DELLA MATERIA Body orifice Helium |
| Zdroj: | The European Physical Journal B. 76:237-249 |
| ISSN: | 1434-6036 1434-6028 |
| Popis: | The mechanism behind the intensity oscillations accompanying the flow of solid helium through a micron-sized orifice into vacuum, called the geyser effect, is investigated by measuring the pressure pulses at various locations in the entire flow system. The new results reveal that the source chamber pressure pulses have the same shape as the external detector pulses monitored in the previous experiments [G. Benedek et al., Phys. Rev. Lett. 95, 095301 (2005)]. New experiments in which the external gas reservoir is isolated from the pressure regulator provide direct information on the mechanism of the collapse leading to the geyser pulses. Thus each geyser pulse is triggered by the breakdown of a plug located upstream of the source chamber. The flow of liquid through the orifice determines the shape of the subsequent geyser pulse. © 2010 EDP Sciences, Società Italiana di Fisica, Springer-Verlag. |
| Databáze: | OpenAIRE |
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