2020
DOI: 10.3390/instruments4010008
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Retro-Fitting Earth-Field Compensation Coils to the Vertical Cryostat GERSEMI in FREIA

Abstract: We describe the design and construction of coils to compensate the Earth’s magnetic field in the vertical cryostat GERSEMI in the FREIA laboratory at Uppsala University.

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Cited by 3 publications
(5 citation statements)
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“…The three vertically mounted coils have a height of 3.7 m and can be powered independently to provide any horizontal field component. The field quality within a circle of 0.4 m radius is below 4 µT at an excitation of 60 µT, or below 3 % [18].…”
Section: "Gersemi" the Vertical Cryostatmentioning
confidence: 96%
See 1 more Smart Citation
“…The three vertically mounted coils have a height of 3.7 m and can be powered independently to provide any horizontal field component. The field quality within a circle of 0.4 m radius is below 4 µT at an excitation of 60 µT, or below 3 % [18].…”
Section: "Gersemi" the Vertical Cryostatmentioning
confidence: 96%
“…It was planned to use the shield when testing superconducting cavities and to remove it when testing superconducting magnets. Since such a magnetic shield would be rather fragile, we replaced it by an active earth-field compensation magnetic system consisting of three horizontal and three vertical coils that surround the vessel of the cryostat [17]. Three horizontal coils, spaced 1 m apart, produce a reasonably constant vertical field component, provided they are excited in a 1, 2/3, 1 pattern.…”
Section: "Gersemi" the Vertical Cryostatmentioning
confidence: 99%
“…The three vertically mounted coils have a height of 3.7 m and can be powered independently to provide any horizontal field component. The field quality within a circle of 0.4 m radius is below 4 μT at an excitation of 60 μT, or below 3% [18].…”
Section: "Gersemi" the Vertical Cryostatmentioning
confidence: 97%
“…It was planned to use the shield when testing superconducting cavities and to remove it when testing superconducting magnets. Since such a magnetic shield would be rather fragile, we replaced it by an active earthfield compensation magnetic system consisting of three horizontal and three vertical coils that surround the vessel of the cryostat [17]. Three horizontal coils, spaced 1 m apart, produce a reasonably constant vertical field component, provided they are excited in a 1, 2/3, 1 pattern.…”
Section: "Gersemi" the Vertical Cryostatmentioning
confidence: 99%
“…Equation 7 is already quite useful to determine the fields of systems containing a finite number of current-carrying wires. We previously used it to design earth-field compensation coils [4].…”
Section: Field Of a Filamentmentioning
confidence: 99%