Measurement devices for cryogenic turbulence research

Recent interest in the study of turbulence using liquid and gaseous helium has prompted the need for high-quality fluid dynamical measurements in a cryogenic environment. To meet this need we have been developing two measurement tools specifically designed to operate below 10 K. The first is a high-accuracy pressure transducer capable of resolving over five orders of magnitude in pressure at both room temperature and at low temperatures. The second is a I MHz cryogenic thermal sensor that can be used as a hot film anemometer to measure velocity fluctuations. In this paper we report on the design features of the devices and measurement results. (C) 2001 Elsevier Science Ltd. All rights reserved.