CRYOSTAT Russian patent published in 2003 - IPC

FIELD: study of optical and galvanomagnetic properties of materials by means of cryogenic equipment. SUBSTANCE: cryostat has vacuum chamber with bottom, object holder with radiation screen, specimen cooling chamber made from material possessing high heat conductivity at low temperature. This chamber is connected with vacuum chamber of cryostat in upper portion through thin-walled tube at low heat conductivity. Unit provided in upper portion of thin-walled tube has electrical contacts for connection with specimen, branch pipe with cocks for evacuation, filling thin-walled tube and specimen cooling chamber with gas and exhausting vapors from them. Bottom of vacuum chamber of cryostat and specimen cooling chamber have matched surface made in form of truncated cone. Movable unit available in upper portion of vacuum chamber of cryostat in used for bringing surfaces having form of truncated cone in and out of contact. Multi-layer shield-vacuum insulation is wound on specimen cooling chamber above which sorbent reservoir is located. Optical ports are made in lower portion of specimen cooling chamber and in bottom of vacuum chamber. EFFECT: reduced consumption of liquefied gas. 2 cl, 3 dwg