Measurement of the magnetic fields at KAGRA site

We measured the magnetic field and seismic activities in 21-25 October
Participants: Uchiyama, Miyakawa, Hayama, Ono, Yano

o Study on the environmental magnetic field at KAGRA site. Getting data which help to deicide the configuration of a coil-magnet actuator which controls a mirror.

o To obtain transfer function of the magnetic fields outside to inside in order to know influence of Schumann resonance.

o To see whether our magnetometers are enough sensitive to measure the environmental magnetic field or not. If the data is occupied by internal noise of the magnetometer, we need to have better magnetometer.

o To get several PEM data (magnetic fields and accelerometer)

magnetic field:
AC
3 dimensional
DC
3 dimensional

seismic noise:
3 dimenstional
North-South, East-West, Vertical

http://gwclio.icrr.u-tokyo.ac.jp/lcgtsubgroup/detectorcharacterization/