New type detectors of particles and radiation based on HTSC materials

We developed an open-flat coil preparation technology allowing to make coils with high Q-factor values. It permits to develop a new measuring device based on a tunnel diode oscillator with such nontraditional open-flat coil. Such devices are very sensitive to the small changes of distances between the metallic planes and the coil's flat surface. The resolution is about (3-4) /spl Aring/. It permits to study small changes of the magnetic penetration depth in HTSC with the same resolution. New method allow to detect the S/N transitions of both the spherical shape single tin (Sn) grains with diameters up-to (2-3) /spl mu/m and 0.5 /spl mu/m thick and 4 /spl mu/m/spl times/5 /spl mu/m YBCO films. Such high resolution permits to use such devices in various areas of science and technology. Particularly, they may be used for the creation of a new detectors of particles and radiation based on HTSC materials. The basic principles and few designs of new detectors are presented suitable for various applications. The sensitivities achieved are: about 10/sup -11/ W/cm/sup 2/ for the visible spectrum radiation; about 0.1 mOe/cm/sup 2/ for the magnetic fields, and 0.1 /spl mu/A/cm/sup 2/ for the currents in HTSC films. Possible directions of the further improvement of the devices' features and also improvement of detectors' parameters are also suggested.