Ground magnetometer data have been providing important knowledge of magnetic pulsations (or ULF waves) for more than a hundred years. With the advance of modern technologies, the accuracy of measurements is constantly improving. In addition, more arrays of magnetometer stations have been established. However, the usage of magnetometer arrays for studying magnetic pulsations has not been fully e...

Precise control of UAV (Unmanned Aerial Vehicle) or MAV (Micro Aerial Vehicle), requires the accurate determination of vehicle orientation. Attitude and heading reference systems (AHRS) are popularly used for vehicle orientation determination. In these systems, Euler angle estimation is more appropriate than quaternion estimation because the accelerometer measurement and magnetometer measuremen...

We present a design for a magnetometer capable of operating at temperatures down to 50 mK and magnetic fields up to 15 T with integrated sample temperature measurement. Our design is based on the concept of a Faraday force magnetometer with a load-sensing variable capacitor. A plastic body allows for fast sweep rates and sample temperature measurement, and the possibility of regulating the init...

We report on a two-channel magnetometer based on non-linear magneto optical rotation in Cs buffered glass cell. The Cs atoms are optically pumped and probed by free running diode lasers tuned to the D2 line. A wide frequency modulation of the pump laser is used to produce both synchronous Zeeman optical pumping and hyperfine repumping. The magnetometer works in an unshielded environment and spu...

A magnetometer instrument, based on a proposal submitted to the Europa Orbiter Announcement of Opportunity, is described. The primary science aim of the instrument would be to characterize the electromagnetic fields which are induced around Europa, Ganymede and Callisto. These signatures will then be interpreted in light of the internal structure of the moons. The design of the instrument consi...

A K-3He co-magnetometer has been developed for a test of Lorentz and CPT symmetry. Polarized K vapor forms a spin-exchange relaxation-free (SERF) magnetometer that has record sensitivity of about 1 fT/ √ Hz. The polarized 3He effectively suppresses sensitivity to the magnetic fields and gradients. Together, the K-3He comagnetometer retains sensitivity to anomalous, CPTand Lorentz-violating fiel...

Sentinel lymph node dissection (sLND) using a magnetometer and superparamagnetic iron oxide nanoparticles (SPIONs) as a tracer was successfully applied in prostate cancer (PCa). Radioisotope-guided sLND combined with extended pelvic LND (ePLND) achieved better node removal, increasing the number of affected nodes or the detection of sentinel lymph nodes outside the established ePLND template. W...

We describe a portable four-channel array of chip-scale atomic magnetometers in a flexible flying-lead configuration. These microfabricated, uncooled sensors with volumes below 1 cm 3 demonstrate sensitivities around 100 fT/Hz 1/2 and bandwidths of several hundred hertz. Performance limits are discussed, as the design is easily scalable to different sensor sizes and large arrays. Initial measur...

This article introduces the influence of laser’s spin projection noise on the sensitivity of Cs atom magnetometer and concludes that the theoretical value of the spin projection noise is about1.23fT·Hz under the optimization conditions of the atom steam chest, namely temperature as 105°C, volume as 0.0785cm and molecular density as 1.7×10 cm. Such research has provided us with the necessary bas...