A5081464492- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Ionosphere and magnetosphere dynamics
- Quantum Mechanics and Applications
- Laser-induced spectroscopy and plasma
- Laser Design and Applications
- Geophysics and Sensor Technology
- Scientific Measurement and Uncertainty Evaluation
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Radioactive Decay and Measurement Techniques
- Atmospheric Ozone and Climate
- Spectroscopy Techniques in Biomedical and Chemical Research
- Spectroscopy and Laser Applications
- Geophysics and Gravity Measurements
- Planetary Science and Exploration
- Spacecraft Design and Technology
- Space Satellite Systems and Control
- Spacecraft and Cryogenic Technologies
- Advanced Materials Characterization Techniques
- Advanced Chemical Physics Studies
- Laser-Matter Interactions and Applications
- Quantum, superfluid, helium dynamics
- Cardiovascular Syncope and Autonomic Disorders
Jet Propulsion Laboratory
2004-2024
California Institute of Technology
2003-2006
The University of Texas at Austin
1995-2000
Deployment of ultracold atom interferometers (AI) into space will capitalize on quantum advantages and the extended freefall persistent microgravity to provide high-precision measurement capabilities for gravitational, Earth, planetary sciences, enable searches subtle forces signifying physics beyond General Relativity Standard Model. NASA's Cold Atom Lab (CAL) operates onboard International Space Station as a multi-user facility fundamental studies atoms mature space-based technologies. We...
Microgravity eases several constraints limiting experiments with ultracold and condensed atoms on ground. It enables extended times of flight without suspension eliminates the gravitational sag for trapped atoms. These advantages motivated numerous initiatives to adapt operate experimental setups microgravity platforms. We describe design payload, motivations choices, capabilities Bose-Einstein Condensate Cold Atom Laboratory (BECCAL), a NASA-DLR collaboration. BECCAL builds heritage...
Lifetimes and bimolecular quenching rate constants have been determined for two-photon laser excited states of Xe*(5p56p,5p56p′,5p57p) Kr*(4p55p) in krypton xenon buffer gases. Collisional mixing between Kr*5p[5/2]2 Kr*5p[5/2]3 is observed analyzed using a coupled two-state model to obtain the mixing. The measured Xe*(6p′,7p) by are 15%–20% smaller than those previously while rates Kr*(5p) an order magnitude larger buffer. Measurements state-to-state deactivation excitation transfer also...
An intense cold-atom beam source based on a modified pyramidal magneto-optical trap has been developed and characterized. We have produced slow of cold cesium atoms with continuous flux 2.2× 109 atoms/s at mean velocity 15 m/s divergence mrad. The corresponding radiant intensity is 1.2×1013 atom s-1 sr-1. characterized the performance our over range operating conditions, measured values for flux, velocity, are in good agreement results from detailed Monte Carlo numerical simulations.
An investigation has been conducted of the characteristics a freely expanding pulsed plasma jet originating from an electrothermal capillary source. The evolution was investigated using temporally-resolved emission imaging with gated intensified CCD camera and temporally- spatially-resolved spectroscopy. images reveal highly underexpanded that forms distinct barrel shock structure, luminous Mach disk. structure reaches approximately quasi-steady state about 70 ps after initiation plasma....
Ultracold atomic gases hold unique promise for space science by capitalizing on quantum advantages and extended freefall, afforded in a microgravity environment, to enable next-generation precision sensors. Atom interferometers are class of sensors which can use freely falling atoms cooled sub-photon-recoil temperatures provide unprecedented sensitivities accelerations, rotations, gravitational forces, currently being developed space-based applications gravitational, earth, planetary...
A compact cold atom beam source based on a multistage two-dimensional magneto-optical trap (MOT) has been demonstrated and characterized. The multiple-stage design greatly reduces the overall size of apparatus while providing high flux atoms. was used to load separate MOT in ultrahigh vacuum, we obtained an actual loading rate 1.5 x 109 atoms/s using only 20 mW total laser power for source. entire apparatus, including optics, can fit into 4 cm 13 volume.
Abstract We briefly describe a ‘third generation’ follow-on to the Cold Atom Lab mission, currently operating aboard ISS and Bose–Einstein Condensate which is expected launch in 2026. This mission would feature modular design that allow critical hardware be optimized for specific investigations while allowing easy exchange with other enable multi-user facility.
Existing space-based cold atom experiments have demonstrated the utility of microgravity for improvements in observation times and minimizing expansion energy rate a freely evolving coherent matter wave. In this paper we explore potential to extend limits ultracold atoms utilizing not just microgravity, but also other aspects space environment such as exceptionally good vacuums extremely temperatures. The tantalizing possibility that may one day be able probe physics quantum objects with...
Abstract We give experimental evidence to confirm that the coherence length of a cold atomic wave packet remains constant while packet's overall physical size increases in time. Doppler sensitive atom interferometry allows for atoms be prepared regime where de Broglie wavelengths are much more comparable lengths than thermal regime. Atomic interactions function which is determined by initial velocity spread wave. Acknowledgements This research was carried out at Jet Propulsion Laboratory,...
We generate a bright atomic beam containing laser-cooled rubidium and cesium, we use this to load mixed-species ultrahigh-vacuum (UHV) magneto-optical trap. have characterized our two-species over range of operating conditions, obtain similar atom fluxes for each species. Within the UHV trap, interspecies inelastic collisions are observed in form enhanced decay rates given species presence second trapped analyze trap decays loss rate due heteronuclear cold collisions, compare result...
The Cold Atom Laboratory (CAL) is a quantum facility for studying ultra-cold gases in the microgravity environment of International Space Station. It enables research temperature regime and force-free inaccessible to terrestrial laboratories. In environment, observation times over few seconds temperatures below 100 pK are achievable, unlocking potential observe new phenomena. CAL launched Station May 2018 has been operating since then as world's first multi-user ultra\-cold atoms space....
The Cold Atom Lab (CAL) launched to the International Space Station (ISS) in May 2018 and has been entirely remotely operated from NASA's Jet Propulsion Laboratory since then as world's first multi-user facility for studying ultra-cold atoms space. CAL uses lasers magnetic traps cool down less than a degree above absolute zero. When clouds of reach these ultracold temperatures, they form fifth state matter called Bose-Einstein Condensate (BEC). Distinct gasses, liquids, solids, plasmas, BEC...
An investigation has been conducted of the characteristics a freely expanding pulsed plasma jet originating from an electrotherma l capillary source. The evolution was investigated using temporally-resolved emission imaging with gated intensified CCD camera and temporally- spatially-resolved spectroscopy. images reveal highly underexpanded that forms distinct barrel shock structure, luminous Mach disk. structure reaches approximately quasi-steady state about 70 us after initiation plasma....
We report on the development of a compact and robust instrument for multi-line ultraviolet resonant Raman spectroscopy. This will be able to collect simultaneous full-range (800-4000 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> ) high-resolution spectra resulting from resonance-enhanced excitation at multiple UV laser wavelengths. The matrix allow identification analysis several organic chemical compounds interest detection...
Gravity gradiometers based on atom-wave interferometry hold the promise for increased sensitivity, and suitability space applications. This capability will significantly advance our knowledge of solid Earth oceans, as well other solar system planets their moons. The quantum interferometer gravity gradiometer is interferometry, intrinsically more sensitive than laser interferometers, because finite mass atom shorter de Broglie wavelengths associated with waves. Recent advances in cooling...