Low-noise cooling apparatus
AssigneeKorea Research Institute of Standards and Science
InventorsKi-woong Kim, Chan Seok Kang, Seong-min Hwang, Seong-Joo Lee, Yong-Ho Lee
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Abstract
A low-noise cooling apparatus is provided. The cooling apparatus includes an outer container and an inner container. A thermal insulation layer in a vacuum state is disposed between the outer container and the inner container. The inner container includes a Dewar containing a liquid refrigerant, a prepolarization coil arranged inside the inner container and immersed in the liquid refrigerant, a pick-up coil immersed in the liquid refrigerant, and a superconducting quantum interference device (SQUID) electrically connected to the pick-up coil and immersed in the liquid refrigerant. The prepolarization coil is made of a superconductor.
Claims17
A low-noise cooling apparatus comprising:
- a Dewar including an outer container and an inner container containing a liquid refrigerant;
- a prepolarization coil disposed inside the inner container and immersed in the liquid refrigerant;
- a pick-up coil immersed in the liquid refrigerant;
- and
- a superconducting quantum interference device (SQUID) electrically connected to the pick-up coil and immersed in the liquid refrigerant,
- wherein the prepolarization coil is made of a superconductor,
- wherein a gap between the outer container and the inner container is functioned as a thermal insulation layer in vacuum,
- wherein a sample is magnetized by the prepolarization coil and becomes a measurement target of the pick-up coil, and
- wherein the Dewar has a concave shape with a recessed space in which the sample is disposed.
A low-noise cooling apparatus comprising:
- an outer container;
- an inner container disposed inside the outer container and including an inner neck part and an inner body part;
- at least one conductive thermal shield layer connected to the inner neck part and disposed to cover at least a side of the inner body part;
- an electrically non-conductive auxiliary thermal shield layer disposed in contact with the conductive thermal shield layer in a region adjacent to a sample disposed below the outer container;
- a prepolarization coil disposed inside the inner container and immersed in a liquid refrigerant;
- a pick-up coil disposed paraxial to the prepolarization coil and immersed in the liquid refrigerant;
- and
- a superconducting quantum interference device (SQUID) electrically connected to the pick-up coil and immersed in the liquid refrigerant,
- wherein a gap between the outer container and the inner container is functioned as a thermal insulation layer in vacuum.
Dependencies are inferred from the claim text.