R. Hipplera aInstitute of Physics, University of Greifswald, Greifswald, Germany bJülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, Outstation at MLZ, Lichterberg Str. 1, Garching, 85747, Germany cJoint Institute for High Temperatures, Russian Academy of Sciences, ul. Izhorskaya 13/19, Moscow, 127412, Russian Federation
The example of a gas flowing through an orifice into the rarefied surrounding space is used to demonstrate the possibility of using clusters for diagnosing gas flows. For conditions studied (it takes a cluster about the same time to relax to the gas velocity is it does to reach the orifice), information on the flow parameters inside the chamber is obtained from the measurement of the cluster drift velocity after the passage through the orifice for various gas consumptions. Other possible uses of clusters in gas flow diagnostics are discussed as well.