A5045256043- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Optical Coatings and Gratings
- Geophysics and Sensor Technology
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Microwave and Dielectric Measurement Techniques
- Mechanical and Optical Resonators
- Microwave Engineering and Waveguides
- Electromagnetic Compatibility and Noise Suppression
- Optical measurement and interference techniques
- Laser Design and Applications
- Dark Matter and Cosmic Phenomena
- Geophysical and Geoelectrical Methods
University of Birmingham
2020-2024
University of Bath
1985
We outline the experimental concept and key scientific capabilities of AION (Atom Interferometer Observatory Network), a proposed programme using cold strontium atoms to search for ultra-light dark matter, explore gravitational waves in mid-frequency range between peak sensitivities LISA LIGO/Virgo/ KAGRA/INDIGO/Einstein Telescope/Cosmic Explorer experiments, probe other frontiers fundamental physics. would complement planned searches as well mergers involving intermediate-mass black holes...
This paper outlines the centralized design and production of ultra-high-vacuum sidearm laser-stabilization systems for AION Ultra-Cold Strontium Laboratories. Commissioning data on residual gas steady-state pressures in chambers, magnetic field quality, laser stabilization, loading rate 3D magneto-optical trap are presented. Streamlining stabilization enabled Collaboration to build equip parallel five state-of-the-art Laboratories within 24 months by leveraging key expertise collaboration....
The inset dielectric guide (IDG) is an easy-to-fabticate alternative to image line and also less sensitive loss by radiation at discontinuities. This paper presents a rigorous variational analysis in space domain based on field network considerations (transverse resonance diffraction). approach yields accurate transverse equivalent for the fundamental mode suitable evaluation desktop calculator. Theoretical experimental results are excellent agreement.
Abstract Large-scale atom interferometers promise unrivaled strain sensitivity to mid-band gravitational waves, and will probe a new parameter space in the search for ultra-light scalar dark matter. These proposals require gradiometry with kilometer-scale baselines, momentum separation above 10 4 ℏ k between interferometer arms, optical transitions long-lived clock states reach target sensitivities. Prohibitively high power wavefront flatness requirements have thus far limited maximum...
Borehole gravity sensing can be used in a number of applications to measure features around well, including rock-type change mapping and determination reservoir porosity. Quantum technology sensors, based on atom interferometry, have the ability offer increased survey speeds reduced need for calibration. While surface sensors been demonstrated real world environments, significant improvements robustness reductions radial size, weight, power consumption are required such devices deployed...
We propose and demonstrate a scheme for Doppler compensated optical cavity enhancement of atom interferometers at significantly increased mode diameters. This overcomes the primary limitations in interferometry, circumventing linewidth limit enabling spatial filtering, power enhancement, large beam diameter simultaneously. approach combines magnified linear with an intracavity Pockels cell. The cell induces voltage-controlled birefringence allowing frequencies to follow Raman lasers as they...
This paper presents the loss analysis of Inset Dielectric Guide (IDG). IDG offers potential for practical low circuits operating at frequencies above 100 GHz. The formulation components is discussed and computed a straight section given compared with measured values. insertion two 90 degree bends in are presented finally theoretical comparison Image Insular line given.
This paper presents an analysis of the inset dielectric guide which is easy to manufacture transmission medium for microwave and millimetre waves. Transverse Resonance Diffraction used form a system two coupled integral eigenvalue equations propagation constant. solved by Galerkin's method leading scalar transverse equivalent circuit mode similar that discontinuity in waveguide. The basis functions are chosen so as take into account correct boundary conditions field at metal edges. Computed...
Sensors deployed down boreholes offer a glimpse into Earth's subsurface properties. This article presents the first step towards new generation of borehole deployable quantum gravity sensors based on cold atoms. Sensors, which once developed, have potential to reveal hidden depths with unparalleled precision.
Large scale atom interferometers promise unrivaled strain sensitivity to midband (0.1 - 10 Hz) gravitational waves, and will probe a new parameter space in the search for ultra-light scalar dark matter. These require momentum separation above 10^4 \hbar k between interferometer arms order reach target sensitivity. Prohibitively high optical intensity wavefront flatness requirements have thus far limited maximum achievable splitting. We propose scheme cavity enhanced interferometry, using...