JPS6418706U

JPS6418706U -

Info

Publication number: JPS6418706U
Application number: JP1987114435U
Authority: JP
Priority date: 1987-07-24
Filing date: 1987-07-24
Publication date: 1989-01-30

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す縦断面図、第２
図は第１図の―線断面図、第３図は第１図の
部の断面詳細図、第４図は第２図の部の詳細
図、第５図は第４図の―線断面図である。１……クライオスタツト本体（外壁）、２……
電磁石、３……液体ヘリウム槽、４……液体窒素
槽、５……内側シールド層、６……外側シールド
層、７……活性炭（除湿体）、５１……内側断熱
空間、５２……中間断熱空間（内側断熱空間）、
６１……外側断熱空間。 Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is a sectional view taken along the line - - of Fig. 1, Fig. 3 is a detailed sectional view of the part shown in Fig. 1, Fig. 4 is a detailed view of the part shown in Fig. 2, and Fig. 5 is a sectional view taken along the line - - of Fig. 4. It is. 1... Cryostat main body (outer wall), 2...
Electromagnet, 3...Liquid helium tank, 4...Liquid nitrogen tank, 5...Inner shield layer, 6...Outer shield layer, 7...Activated carbon (dehumidifier), 51...Inner heat insulation space, 52...Intermediate Heat insulation space (inner heat insulation space),
61...Outer insulation space.

Claims

[Scope of utility model registration request]

A shield layer is arranged around the liquid helium tank to form an inner heat insulating space, a liquid nitrogen tank is provided outside the inner heat insulating space, and an outer heat insulating space is formed outside the liquid nitrogen tank and sealed by an outer wall. This outer wall is provided with a vacuum port that communicates with the outer heat insulation space, and each of the above heat insulation spaces communicates with each other, and a dehumidifier is attached to the surface of the liquid nitrogen tank to maintain each of the above heat insulation spaces in a vacuum. A cryostat characterized in that a liquid nitrogen tank is filled with liquid nitrogen and a liquid helium tank is filled with liquid helium.