A5032121453- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Quantum, superfluid, helium dynamics
- Quantum Chromodynamics and Particle Interactions
- Laser-induced spectroscopy and plasma
- Atomic and Molecular Physics
- Cosmology and Gravitation Theories
- Spectroscopy and Laser Applications
- Nuclear physics research studies
- Nuclear and radioactivity studies
- Geophysical and Geoelectrical Methods
- Nuclear reactor physics and engineering
- Advancements in Photolithography Techniques
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Ionosphere and magnetosphere dynamics
- Nuclear Physics and Applications
- Laser Design and Applications
- High-Energy Particle Collisions Research
Lawrence Berkeley National Laboratory
2019-2024
University of California, Berkeley
2019-2024
University of Edinburgh
2024
University of Oxford
2021
Deutsches Elektronen-Synchrotron DESY
2021
Max Planck Institute for Nuclear Physics
2021
Moscow Engineering Physics Institute
2019
University of Arkansas at Fayetteville
1977
Optical excitation functions produced by low-energy electron impact are reported for several rotational lines originating from the E,F1Σ+g and H1Σ+g electronic states of neutral H2. The E1Σ+g→B1Σ+u, F1Σ+g→B1Σ+u, →B1Σ+u band systems observed at an effective spectral slit width ?2 Å, over energy range 0–300 eV. transitions identified as v′=2,3,4 vibrational levels E state, v′=5 level F v′=2 H state. Absolute emission cross section measurements obtained 200 eV 30 mtorr H2 gas pressure through...
As noble liquid time projection chambers grow in size their high voltage requirements increase, and detailed, reproducible studies of dielectric breakdown the onset electroluminescence are needed to inform design. The Xenon Breakdown Apparatus (XeBrA) is a 5-liter cryogenic chamber built characterize DC behavior xenon argon. Electrodes with areas up 33~cm$^2$ were tested while varying cathode-anode separation from 1 6~mm difference 75~kV. A power-law relationship between field electrode area...
The optical excitation function for the G¹∑g+→B¹∑u+ transition of H2 spectrum has been determined electron impact energies in range 0–500 eV and at gas pressures ≤ 30 mtorr. Measurements absolute emission cross section λ = 4634 Å [G → B(0, 0) P1,R2,R3] vibration-rotational line blend have carried out 200 incident energy. G¹∑g+(ν′=0) state radiative lifetime also yield a single-mode decay, with ∼ ns. Both dc intensity time-solved measurements are observed to be independent pressure beam...
Maintaining the electric fields necessary for current generation of noble liquid time projection chambers (TPCs), with drift lengths exceeding 1 m, requires a large negative voltage applied to their cathode. Delivering such high is associated an elevated risk electrostatic discharge and electroluminescence, which would be detrimental performance experiment. The Xenon Breakdown Apparatus (XeBrA) 5-l, test chamber built investigate contributing factors electrical breakdown in liquids. In this...
Maintaining the electric fields necessary for current generation of noble liquid time projection chambers (TPCs), with drift lengths exceeding one meter, requires a large negative voltage applied to their cathode. Delivering such high is associated an elevated risk electrostatic discharge and electroluminescence, which would be detrimental performance experiment. The Xenon Breakdown Apparatus (XeBrA) five-liter, test chamber built investigate contributing factors electrical breakdown in...