On the Possibility of the Creation of Radically New Type Detectors of Particles and Radiation Based on High-T_c Superconductors

Abstract

Some aspects of high-T c superconductors (HTSC) electrophysical properties, which could be successfully applied to the detection of particles and radiation are discussed. The possibilities and the perspectives of the creation of completely new type detectors of elementary particles and ionizing radiation, based on HTSC materials, are considered. At this, the use of the unusual open-flat measuring (pick-up) coils made of, in particular, the HTSC materials, as a detecting element in known tunnel diode oscillator technique it seems of considerable promise and may find also a number of other applications in different areas of science and technology. The results of the HTSC thin-film structures real use for the detection of the visible and infrared spectrum radiations as well as constant magnetic fields and also direct currents passing through the HTSC film structures are presented. Three designs of these detectors are proposed suitable for various applications. The achieved up-to-date sensitivity is about 10-11 Wt/cm2/Hz-1/2 for the 0.63 μm and 0.8 μm wavelength radiations, about 0.1 mOe/cm2/Hz-1/2 for the constant magnetic fields and about 0.1 μA/cm2/Hz-1/2 for the direct currents passing through the HTSC thin-film structures. Capabilities of new detectors are evaluated and possible directions of further essential improvement of their parameters are also suggested.

Highly sensitive open-flat coil magnetometer for the λ(H,T) measurements in plate-like high-Tc cuprates

“…Such superiority in the resolution of the improved LC resonator method makes it attractive for a creation of various new types of high resolution testing and detecting techniques. 23,28,29 The measured change in the oscillator resonant frequency, ␦F, can then be linearly related to the length, S , of magnetic shielding by the sample of the testing electromagnetic field generated by a flat coil: S ϭϪG•␦F. In general, the measured magnetic shielding length S , we deal with at the experiments, is not the same as the superconducting London penetration depth, L , in the Meissner state or the pinning penetration depth, pin , in the mixed state.…”

“…23,24 As a consequence, we created a number of TD oscillators ͑the OFC magnetometers͒ with highly stable frequency and low power ͑Ͻ10 W͒ for different applications. They operate between 4.2 and 300 K with a frequency stability ␦F/Fϳ10 Ϫ6 -10 Ϫ7 /h ͑depending on the level of diffused external rf fields near the testing coil͒ at 300 K and a better stability than ␦F/Fϳ10 Ϫ7 /h below 100 K under the temperature stability better than a few mK/h ͑see Fig.…”

“…5͒. 23,24,28,29 The very high stability of the TD oscillator ͓(␦F) stab ϳ1 -3 Hz for 23 MHz at 300 K and slightly better at low temperatures͔ and the flat coil preparation technology enabled us to assemble the highly sensitive OFC magnetometer with the resolution of about ⌬ S ϭG w •(␦F) stab ϳ1 -3 Å. In this case, the relative resolution is better than ⌬ S / S ϭ(␦F) stab /(␦F) exp film ϭ(1 -3) Hz/3 MHzϳ10 Ϫ6 .…”

“…Some additional ways to improve the OFC based techniques are discussed in Ref. 23. Such improvements will allow us to reach the level of detection of a destruction of the superconductivity in a few micrometer size specimens by a few flux quantum.…”

Newly-Proposed Methods for Early Detection of Incoming Earthquakes, Tsunamis & Tidal Motion

“…ment of the resolution of measurements by 3-4 orders of magnitude (especially, in studies of thin, plate-like HTS materials [1,[3][4][5][6][7][8]). For comparison, typical values of the filling factor for solenoid coils are 10  4 10  3 for the said samples.…”