A5039369604- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Advanced Chemical Physics Studies
- Spectroscopy and Laser Applications
- Quantum optics and atomic interactions
- Laser-Matter Interactions and Applications
- Spectroscopy and Quantum Chemical Studies
- Mass Spectrometry Techniques and Applications
- Laser Design and Applications
- Nuclear Physics and Applications
- Inorganic Fluorides and Related Compounds
- Laser-Plasma Interactions and Diagnostics
- Electron and X-Ray Spectroscopy Techniques
- Advanced Frequency and Time Standards
- Advanced Fiber Laser Technologies
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
University of Colorado Boulder
2017-2021
National Institute of Standards and Technology
2021
Harvard University
2021
Imperial College London
2018
Joint Institute for Laboratory Astrophysics
2012-2018
Vacuum ultraviolet (VUV) light at 118 nm has been shown to be a powerful tool ionize molecules for various gas-phase chemical studies. A convenient table top source of can produced by frequency tripling 355 from Nd:YAG laser in xenon gas. This process low efficiency, typically producing only nJ/pulse VUV light. Simple models the predict power should increase quadratically with increasing pressure. However, experimental production observed reach maximum and then decrease zero Here, we...
Controlling high voltage is a critical aspect of Stark deceleration, technique that uses electric fields to produce slow molecules. Traditionally, deceleration required only commercial high-voltage switches operate. However, new continuous version which promises significantly improved performance, requires chirped sinusoidal voltages. The complexity the electronics needed run this decelerator has restricted implementation for all but few groups. challenge create amplifiers have frequency...
Trapping cold, chemically important molecules with electromagnetic fields is a useful technique to study small and their interactions. Traps provide long interaction times that are needed precisely examine these low density molecular samples. However, the trapping lead non-uniform distributions in systems. Therefore, it be able experimentally characterize spatial distribution trap. Ionizing different locations trap using resonance enhanced multiphoton ionization (REMPI) detecting resulting...
Producing high densities of molecules is a fundamental challenge for low-temperature, ion-molecule reaction studies. Traveling-wave Stark decelerators promise to deliver density beams cold, polar but require non-trivial control high-voltage potentials. We have overcome this experimental and demonstrate continuous deceleration ND3 from 385 10 m/s, while driving the decelerator electrodes with kV amplitude sinewave. In addition, we test an alternative slowing scheme, which increases time delay...
The dynamics of electron-induced reactions in condensed trifluoroiodomethane (CF3I) were studied under ultrahigh vacuum conditions. Seven CF3I radiolysis products (C2F6, C2F5I, C2F3I, CF2I2, C2F4I2, CFI3 and C2F3I3) identified using temperature-programmed desorption experiments conducted after irradiation with 4 eV electrons. Although C2F6 formation at energies above is ascribed to electronic excitation followed by prompt dissociation the C-I bond form [Formula: see text] radicals that...
Stark deceleration is a technique that uses time-varying inhomogeneous electric fields to decelerate polar molecules for various molecular beam and trapping experiments. New ring-geometry decelerators with continuously varying voltages offer method produce more intense source of in called traveling-wave deceleration. However, this type experimentally challenging than the typically used crossed-pin geometry pulsed voltages. Here, we present an experimental realization decelerator using either...