A5013833048- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Functional Brain Connectivity Studies
- Magnetic and transport properties of perovskites and related materials
- Advanced MRI Techniques and Applications
- Advanced Frequency and Time Standards
- Quantum Mechanics and Applications
- Quantum, superfluid, helium dynamics
- Reflective Practices in Education
- Ionosphere and magnetosphere dynamics
- Educational and Psychological Assessments
- EFL/ESL Teaching and Learning
University of Edinburgh
1991
Optically-pumped magnetometers (OPMs) are highly sensitive, compact magnetic field sensors, which offer a viable alternative to cryogenic sensors (superconducting quantum interference devices – SQUIDs) for magnetoencephalography (MEG). With the promise of wearable system that offers lifespan compliance, enables movement during scanning, and provides higher quality data, OPMs could drive step change in MEG instrumentation. However, this potential can only be realised if background fields...
Magnetically shielded rooms (MSRs) use multiple layers of materials such as MuMetal to screen external magnetic fields that would otherwise interfere with high precision field measurements magnetoencephalography (MEG). Optically pumped magnetometers (OPMs) have enabled the development wearable MEG systems which potential provide a motion tolerant functional brain imaging system spatiotemporal resolution. Despite significant promise, OPMs impose stringent shielding requirements, operating...
Magnetoencephalography (MEG) has been revolutionised by optically pumped magnetometers (OPMs). "OPM-MEG" offers higher sensitivity, better spatial resolution, and lower cost than conventional instrumentation based on superconducting quantum interference devices (SQUIDs). Moreover, because OPMs are small, lightweight, portable they offer the possibility of lifespan compliance (with control background field) motion robustness, dramatically expanding range MEG applications. However, OPM-MEG...
Non-invasive imaging has transformed neuroscientific discovery and clinical practice, providing a non-invasive window into the human brain. However, whilst techniques like MRI generate ever more precise images of brain structure, in many cases, it's function within neural networks that underlies disease. Here, we review potential for quantum-enabled magnetic field sensors to shed light on such activity. Specifically, describe how optically pumped magnetometers (OPMs) enable...
Recent advances in the understanding and control of quantum technologies, such as those based on cold atoms, have resulted devices with extraordinary metrological performance. To realise this potential outside a lab environment size, weight power consumption need to be reduced. Here we demonstrate use laser powder bed fusion, an additive manufacturing technique, production technique relevant manufacture sensors. As demonstration constructed two key components using manufacturing, namely...
Here, a benchtop hybrid magnetic shield containing four mumetal cylinders and nine internal flexible printed circuit boards is designed, constructed, tested, operated. The designed specifically as test-bed for building operating ultra-sensitive quantum magnetometers. geometry spacing of the are optimized to maximize shielding efficiency while maintaining Johnson noise < 15 fT/ √ Hz. Experimental measurements at shield's center show passive (1.0 ± 0.1)×10 <sup...
This article falls into two parts. In the first part, some general issues affecting teacher supervision will be discussed. The supervisory dialogue is seen as a crucial stage in process. A simple 'key stage' observation schedule for proposed. second part of article, implementation these ideas within context 'microsupervision' workshop ELT educators and field supervisors Sri Lanka described evaluated.
The accurate control of magnetic fields is a cornerstone multiple emerging quantum technologies. These technologies often require passive high permeability shielding and internal active field-generating coils to create their own bespoke field landscape. However, generated by are distorted shielding, preventing the efficient generation desired environment. Here, we design cylindrical four-layer shield with an interior hybrid active-passive coil system that explicitly optimised include...
Wearable magnetoencephalography based on optically pumped magnetometers (OPM-MEG) offers non-invasive and high-fidelity measurement of human brain electrophysiology. The flexibility OPM-MEG also means it can be deployed in participants all ages permits scanning during movement. However, the magnetic fields generated by neuronal currents - which form basis signal are much smaller than environmental fields, this measurements highly sensitive to interference. Further, OPMs have a low dynamic...
Recent advances in the understanding and control of quantum technologies, such as those based on cold atoms, have resulted devices with extraordinary metrological sensitivities. To realise this potential outside a lab environment size, weight power consumption need to be reduced. Here we demonstrate use laser powder bed fusion, an additive manufacturing technique, production technique for components that make up sensors. As demonstration constructed two key using manufacturing, namely...
ABSTRACT Magnetoencephalography (MEG) has been revolutionised in recent years by optically pumped magnetometers (OPMs). “OPM-MEG” offers higher sensitivity, better spatial resolution and lower cost than conventional instrumentation based on superconducting quantum interference devices (SQUIDS). Moreover, OPMs offer the possibility of motion robustness lifespan compliance, dramatically expanding range MEG applications. However, OPM-MEG remains nascent technology; it places stringent...