A sensor configuration for a 304 SQUID vector magnetometer.
A novel SQUID vector magnetometer system is introduced which has been specially designed for the use inside the strongly magnetically shielded room BMSR-2 of PTB. The system is housed in a dewar with a flat bottom and an inner diameter of Ø 250 mm. The SQUIDs are arranged so that in addition to the usually measured Z-component of the field the horizontal magnetic fields are measured too. A total of 304 DC-SQUID magnetometers are divided up into 19 identical modules. The 16 low-Tc SQUIDs of each module are located in such a way that an estimation of the magnetic field in all three dimensions is possible at three points inside the module. The 57 SQUIDs of the lowest Z plane of all modules form a hexagonal grid with a base length of 29 mm. The design criteria and the physical principle behind the complex SQUID arrangement are explained.
Schnabel
A
A
Physikalisch-Technische Bundesanstalt, Abbestr. 2-12, 10587 Berlin, Germany. Allard.Schnabel@PTB.de
Burghoff
M
M
Hartwig
S
S
Petsche
F
F
Steinhoff
U
U
Drung
D
D
Koch
H
H
D004574:Electromagnetic Fields; D004867:Equipment Design / Q000379:methods*; D008280:Magnetics / Q000295:instrumentation*