A5079760570- Nuclear reactor physics and engineering
- Nuclear Materials and Properties
- Nuclear Physics and Applications
- Graphite, nuclear technology, radiation studies
- Particle Accelerators and Free-Electron Lasers
- Astrophysical Phenomena and Observations
- Advanced X-ray Imaging Techniques
- Spacecraft and Cryogenic Technologies
- Planetary Science and Exploration
- Radiation Effects in Electronics
- Advanced Thermodynamic Systems and Engines
- Nuclear and radioactivity studies
- Gas Dynamics and Kinetic Theory
- X-ray Spectroscopy and Fluorescence Analysis
- Particle Detector Development and Performance
- Radiative Heat Transfer Studies
- Hybrid Renewable Energy Systems
- Thermal Radiation and Cooling Technologies
- Advancements in Photolithography Techniques
University of Tennessee at Knoxville
2018-2022
Knoxville College
2020
Oak Ridge National Laboratory
2020
Pennsylvania State University
2017-2019
Abstract We present the methodology used to fabricate an X-ray reflection grating and describe a technique for replication. Further, we experimental procedure results of study measure diffraction efficiency replicated in extreme off-plane geometry. The blazed demonstrates total ∼60% from 0.34 1.2 keV at grazing angle ∼1.°5, with single-order ranging ∼35% 65% energies within blaze envelope. measured relative reflectivity metal coating averages ∼90% above keV. Data collected as function beam...
A high temperature steady-state experiment was used to generate levels up 1300 K. This level provides sufficient thermal energy for radiative heat transfer studies. Series of experiments were conducted with varying emissivity environments. These performed using OUTSET heated by 200 W direct-current power and an internal pressure below 1.3 Pa. The experimental results compare leading modeling software packages various solution methods. compared against COMSOL ANSYS Mechanical. Within the...
The Water Recovery X-ray Rocket (WRXR) is a sounding rocket payload that will launch from the Kwajalein Atoll in April 2018 and seeks to be first astrophysics water recovered by NASA. WRXR's primary instrument grating spectrometer consists of mechanical collimator, reflection gratings, grazing-incidence mirrors, hybrid CMOS detector. obtain spectrum diffuse soft emission northern part Vela supernova remnant optimized for 3rd 4th order OVII emission. Utilizing field view 3.25° × resolving...
The Water Recovery X-Ray Rocket (WRXR) was a suborbital rocket payload that launched and recovered in April 2018. WRXR flew two technologies being developed for future large x-ray missions: reflection gratings hybrid CMOS detector (HCD). large-format replicated on the were measured ground calibrations to have absolute single-order diffraction efficiency of ∼60 % , ∼50 ∼35 at CVI, OVII, OVIII emission energies, respectively. HCD operated with ∼6 e<sup> − </sup> read noise ∼88 eV energy...
The Water Recovery X-ray Rocket (WRXR) is a sounding rocket payload that launched from the Kwajalein Atoll in April 2018 and was first NASA astrophysics to be recovered water. WRXR's primary instrument grating spectrometer consists of mechanical collimator, reflection gratings, grazing-incidence mirrors, hybrid CMOS detector. We present here design WRXR spectrometer's gratings mirrors.
Nuclear thermal propulsion (NTP) demonstrated a reported technology readiness level of 5 during the work performed in 1950s–1970s under Rover program. This capability was achieved through design, construction, and use 22 experimental ground tests. These experiments served as testbeds for designs, materials, instrumentation at prototypical NTP conditions. To continue investigation into system components, fuels, modern testbed has been designed implemented. A steady-state, high-temperature,...
The development of nuclear rocket technology is critical for further exploration extra-terrestrial bodies. Nuclear rockets can provide various advantages over current chemical rockets. However, the harsh environment provides several challenges regarding instrument performance. Temperature extremes, radiation (reactor and space), inability to conduct traditional maintenance activities lead severe degradation in To better understand effects on instrumentation, an irradiation campaign has been...
A high-temperature, steady-state, in-pile experiment was developed to simulate prototypical nuclear thermal propulsion conditions. The experimental development of the resistively heated test apparatus involved spatially scaling device a larger region from previous smaller out-of-pile prototype. series tests and investigations were conducted replicate system’s success achieving 2500 K. However, limitations within assembly identified; specifically, heater filament design does not scale well....