We report the latest results from a Wellcome Trust-funded collaborative project between the University of Nottingham and the University College of London investigating OPM based multichannel MEG to be presented at the Workshop on Optically Pumped Magnetometers (WOPM ‘17). Elena Boto and coworkers at Nottingham report, “We have shown the ability to beamform sources to… Read more »
An ideal sensor is stable and exhibits very low drift between the measured value and the actual value, a task often difficult to achieve at low frequencies over long measurement times. Our QTFM attains high, low-frequency stability and high sensitivity by implementing low-noise/low-drift electronics, and by stabilizing to a high degree every operating parameter of the… Read more »
QuSpin’s first public demonstration of our QTFM magnetometer product was at the Navy Forum for SBIR/STTR Transition held April 3-5, 2017 at the Gaylord Convention Center in National Harbor, MD. This demonstration showcased the progress QuSpin has made in the Phase I and Phase II development towards Navy SBIR topic N141-004. The high-sensitivity mags are small, low… Read more »
In an important step towards building a full-head MEG system with OPMs, researchers at University of Nottingham and University College of London published results on their studies with a single OPM channel. A custom 3D printed MEG helmet was fabricated with slots to hold OPM at various locations. MEG evoked response was measured from 13 different… Read more »
Young Kim and Igor Savukov at Los Alamos National Labs demonstrate a new room temperature magnetic microscope. They used QZFM as the sensor element and a ferrite flux guide to transport magnetic field from a tiny test object to the sensor. In their experimental work, the authors used a 0.75 mm coil as the test… Read more »
Hari Eswaran and coworkers at the University of Arkansas published results from a head-on comparison between fetal Magnetocardiography recordings made with a SQUID system (CTF, 151 sensor SARA) and an OPM system (QuSpin, 2 sensors). The authors conclude: “Our preliminary results indicate that OPMs are potentially capable of replacing SQUIDs for fMCG systems. With further studies, we… Read more »
The picture above shows one our very early OPM prototypes (made back in Dec. 2012) which helped convince ourselves (and NIH) the feasibility of building practical, non-cryogenic sensors to potentially replace the SQUIDs. The prototypes were fragile and needed fiber-coupled external high power lasers and complex laboratory electronics, but the performance was very good even in the… Read more »