Magnetic Field within Empty Room
The magnetic shielding room was constructed by NKK plant construction Co. Ltd (maybe inaccurate).
Active shild is not used.
Results of magnetic noise level at 2 microtesla magnetic field without the room.
| fT/cm/sqrt(Hz) | all | planar gradiometer |
magnetometer |
|---|---|---|---|
| Nov 30,2004 | 2.663 | 2.519 | 2.951 |
| Jan 31,2005 | 2.623 | 2.527 | 2.816 |
| Feb 7,2005 | 2.610 | 2.516 | 2.797 |
| Feb 21,2005 | 2.642 | 2.51 | 2.906 |
| Feb 25,2005 | 2.659 | 2.499 | 2.98 |
| Oct 23,2005 | 2.605 | 2.511 | 2.793 |
| Nov 14,2005 | 2.596 | 2.532 | 2.722 |
| Feb 27,2006 | 2.567 | 2.542 | 2.618 |
| Mar 27,2006 | 2.478 | 2.446 | 2.543 |