Title :
Magnetic Disturbance Due to the Hemispherical Hole in the Ground for a Building at the Magnetic Test Site
Author :
Yamazaki, Keita ; Hyakusoku, Yasutoshi ; Muramatsu, Kazuhiro ; Kitamura, Hideki ; Fujiwara, Koji ; Kobayashi, Koichiro
Author_Institution :
Res. & Dev. Inst., Takenaka Corp.
Abstract :
At the Japan Aerospace Exploration Agency, a zero magnetic field is required to test the magnetic characteristics of spacecrafts, satellites and to calibrate magnetometers. This zero-magnetic field is realized by means of a three-axis coil system which can cancel the uniform earth´s magnetic field, but cannot cancel magnetic disturbance because of no magnetically shielded room. Therefore, the magnetic disturbance within and in the vicinity of the zero-magnetic field of a Spacecraft Magnetic Test Site (SMTS) is investigated by comparing the results of three-dimensional (3-D) finite-element analysis with measurements. Distributions of the magnetic disturbance due to three hemispherical objects-the roof, the foundation made of concrete, and the hole in the ground for the SMTS building-are analyzed and compared with those measured by a proton magnetometer. Consequently, it is shown that the hemispherical hole in the ground for the SMTS building, which has weak magnetism and is a little higher than that of concrete, generates a weak magnetic disturbance in the zero-magnetic field of the SMTS
Keywords :
aerospace test facilities; finite element analysis; magnetic fields; magnetometers; Japan Aerospace Exploration Agency; finite-element analysis; hemispherical hole; magnetic characteristic; magnetic disturbance; proton magnetometer; spacecraft magnetic test site; zero magnetic field; Aerospace testing; Coils; Concrete; Magnetic analysis; Magnetic field measurement; Magnetic shielding; Magnetometers; Satellites; Space vehicles; Surface-mount technology; Hemispherical hole in the ground for a building; three-dimensional (3-D) finite-element analysis; weak magnetic disturbance; zero-magnetic field of a Spacecraft Magnetic Test Site;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.879158