Magnetometer device with a Dewar vessel for measuring weak magnetic fields
First Claim
1. A magnetometer device for measuring weak magnetic fields, of at least one field source comprising:
- a Dewar vessel arranged below or laterally to the at least one field source and having an interior region and a neck, said interior region being accessed via said neck;
an insertion vessel disposed in the interior region of the Dewar vessel in which liquid refrigerant can be retained;
a plurality of superconducting gradiometers and associated SQUIDs arranged in the interior region of the Dewar vessel, the SQUIDs being positioned in or at the insertion vessel;
a pipeline terminating in said insertion vessel and extending through the neck feeding liquid refrigerant through the neck from outside the Dewar vessel;
at least one hose line extending from the insertion vessel to the superconducting gradiometers feeding gaseous refrigerant to said gradiometers; and
a throttling device positioned in the neck for inhibiting warmer gaseous refrigerant from flowing back into the interior region, said pipeline extending through said throttling device.
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Accused Products
Abstract
A magnetometer device for measuring the magnetic fields caused by field sources includes a Dewar vessel that has an interior with access through a neck. The interior contains several superconducting gradiometers as well as corresponding SQUIDs. The Dewar vessel is arranged underneath or laterally to the field source. An insertion vessel for a liquid refrigerant which is thermally coupled to the SQUIDs and is located in the interior. The gaseous refrigerant taken from the insertion vessel is supplied to the gradiometers through hose lines. The refrigerant escaping into the interior is discharged to the outside via the neck. A throttling device is inserted into the neck to prevent warmer gaseous refrigerant from entering the interior.
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Citations
19 Claims
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1. A magnetometer device for measuring weak magnetic fields, of at least one field source comprising:
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a Dewar vessel arranged below or laterally to the at least one field source and having an interior region and a neck, said interior region being accessed via said neck; an insertion vessel disposed in the interior region of the Dewar vessel in which liquid refrigerant can be retained; a plurality of superconducting gradiometers and associated SQUIDs arranged in the interior region of the Dewar vessel, the SQUIDs being positioned in or at the insertion vessel; a pipeline terminating in said insertion vessel and extending through the neck feeding liquid refrigerant through the neck from outside the Dewar vessel; at least one hose line extending from the insertion vessel to the superconducting gradiometers feeding gaseous refrigerant to said gradiometers; and a throttling device positioned in the neck for inhibiting warmer gaseous refrigerant from flowing back into the interior region, said pipeline extending through said throttling device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification