SEARCH · Engineering Papers
Results for “LAB”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Lab Testing of Inverters: 100 kW and below [Slides]
The report summarizes the laboratory testing results of a 33kW string inverter. The inverter is a legacy inverter and does not have the capabilities required in IEEE 1547 2018.
SRF Cavity Emulator for PIP-II LLRF Lab and Field Testing
There are many stages in the LLRF and RF system development process for any new accelerator that can take advantage of hardware emulation of the high-power RF system and RF cavities. LLRF development, bench testing, control system development and testing of installed systems must happen well before SRF cavities are available for test. The PIP-II Linac has three frequencies of SRF cavities, 162.5 MHz, 325 MHz and 650 MHz and a simple analog emulator design has been chosen that can meet the cavity bandwidth requirements, provide tuning errors to emulate Lorentz force detuning and microphonics for all cavity types. This emulator design utilizes a quartz crystal with a bandwidth of 65Hz at an IF of ~ 4 MHz, providing a Q of ~ 1.3 x 10^7 at 650MHz. This paper will discuss the design and test results of this emulator.
INVESTIGATION OF HYDROGEN GENERATION IN SNF CANISTERS USING LAB-SCALE "MINI-CANISTER" RADIOLYSIS TESTING
Explore the source record for details and available documents.
INL Carbon Characterization Lab
What goes into AGC Graphite Characterization
From Lab to Algorithm: Cloud-based Biological Data Preparation, Tracking, and Checking for AI-Readiness
Explore the source record for details and available documents.
ABF Industry Engagement Lab Call with Danimer Scientific
This Agile BioFoundry Directed Funding Opportunity project with Danimer Scientific focuses on the development of a strain and a corresponding bioprocess to convert bio-based feedstocks to mixed composition polyhydroxyalkanoates (PHAs). Danimer Scientific produces PHAs today at industrial scale in proprietary strains and for many applications where bio-based, biodegradable materials are advantaged. The project team consists of NREL to lead the strain engineering efforts, PNNL to conduct systems biology experiments that will inform further strain engineering, and Danimer to conduct bioprocess development and materials development. To date, we have on-boarded Danimer strains and demonstrated successful engineering thereof. We anticipate conducting systems biology studies in Spring 2023. Overall, the impact of this DFO project could be improved material properties accessed through the Design-Build-Test-Learn cycle for designer PHA production.
UCOP Lab Fee Research Program Information Session
Explore the source record for details and available documents.
Some highlights of the Jefferson Lab program at 6 and 12 GeV
Explore the source record for details and available documents.
MEASUREMENT OF HYDROGEN GENERATION FROM SNF CLADDING SURROGATES IN A LAB-SCALE "MINI-CANISTER"
Explore the source record for details and available documents.
CTEQ-Jefferson Lab (CJ) Global Analysis of Parton Distributions
We present new sets of next-to-leading order parton distribution functions (PDFs) determined by global fits to a wide variety of data for hard scattering processes. The analysis includes target mass and higher twist corrections needed for the description of deep-inelastic scattering data at large x and low Q2, and nuclear corrections for deuterium targets. The PDF sets correspond to three different models for the nuclear effects, and provide a more realistic uncertainty range for the d quark PDF compared with previous fits. Applications to particle production cross sections at colliders are also discussed.
Mott Polarimeter Upgrade at Jefferson Lab
A Mott polarimeter with a design optimized for 5.5 MeV/c has been in routine use at the CEBAF accelerator for well over a decade, providing polarization measurements approaching 1\% accuracy. Measurements with different target elements (Au, Ag, Cu) over decades of target thicknesses (100 -- 10,000 angstroms), and beam energies between 2 and 8 MeV allow us to determine the effective analyzing power with a high degree of certainty. Recent and planned improvements in our polarimeter configuration, detectors and data acquisition system, coupled with a low 31 MHz repetition rate beam allow us to distinguish and suppress electrons that do not originate from the target foil. This work coupled with a significant effort to produce a detailed GEANT4 model of the polarimeter is part of an effort to determine systematic uncertainties at the level of the theoretically calculated analyzing power. We describe our activities and a series of planned measurements that will allow us to demonstrate and possibly improve the precision and accuracy of polarization measurements at JLab, as required for future parity violation experiments.
High-Intensity Continuous Wave Slow Positron Source at Jefferson Lab
We present a novel concept of an electron linac-based slow positron source with projected intensity on the order of 10^10 slow e+/s. The key components of this concept are a Continuous Wave (CW) electron beam, a rotating positron-production target, a synchronized raster/anti-raster, a transport channel, and extraction of positrons into a field-free area through a magnetic field terminator plug for moderation in a solid Neon moderator. The feasibility calculations were completed in the framework of GEANT4 simulation and OPERA-3D magnetic field calculation code.
Parity-violating deep inelastic scattering with SoLID at Jefferson Lab
Deep inelastic electron scattering has been an invaluable tool in understanding the internal structure of the nucleon and has provided motivation for the standard model of quarks and the concept of asymptotic freedom. When coupled with parity-violating measurements through the interference of a virtual photon and weakly interacting Z boson, new linear combinations of quarks are probed which can provide information which is complementary to the standard electromagnetic interactions. Precision measurements on deuterium allows for novel tests of the standard model, possible observations of quark-level charge symmetry violation, and the study of specific higher-twist effects. Additionally, measurements on a proton target can provide a precise extraction of the parton ratio $d/u$ as the Bjorken scaling variable $x \rightarrow 1$. Presented will be an approved experimental program at Thomas Jefferson National Accelerator Facility using the Solenoidal Large Intensity Device (SoLID) to study parity-violating deep inelastic scattering.
The Heavy Photon Search Experiment at Jefferson Lab
New heavy vector bosons, also known as ``heavy photons'', ``dark photons'', or ``hidden sector photons'', are expected on very general theoretical grounds. Recent astrophysical evidence motivates the direct search for a heavy photon $A'$ in the mass range $m_{A'} \sim 20$ to 1000 MeV/c$^{2}$, with coupling to ordinary photons {\it via} a kinetic mixing term $\propto\epsilon$, expected around $10^{-5}$ to $10^{-2}$. Such a new dark force gauge boson below the GeV range would naturally mediate TeV range dark matter annihilation, and interaction with ordinary matter. Existing constraints from collider searches and beam dump experiments leave much of this preferred $(m_{A'},\epsilon)$ phase space unexplored. The detection of electroproduced $A'$ on a heavy target from their decay into $e^{+}e^{-}$ pairs comes with a copious QED trident background. Using the high luminosity and precision beam available from Jlab, and combining a silicon microstrip vertex tracker with a lead-tungstate calorimeter for triggering, the HPS experiment will hunt for the $A'$ in a large $\epsilon$ range, with unique sensitivity in the lower coupling range using vertexing to suppress the trident background. In this talk, the experimental setup and goals of the HPS experiment will be presented.
Characterization of aerogel and Photomultiplier Tubes for the 12-GeV Hall C Kaon Aerogel Detector at Jefferson Lab
Thomas Jefferson National Accelerator Facility's upgrade from 6-GeV to 12-GeV beam energy requires a new magnetic spectrometer for Hall C. At 6 GeV the High Momentum Spectrometer (HMS) made use of an aerogel threshold Cherenkov detector for particle identification of p/K/p. The HMS is not designed to operate at momenta greater than 7 GeV/c, instead a Super High Momentum Spectrometer (SHMS) will be constructed. An aerogel threshold Cherenkov detector needs to be included in the new spectrometer as well. Pions, kaons and protons of sufficient velocity produce Cherenkov radiation when passing through media with low indices of refraction. Aerogels with n = 1.020 and n = 1.030 will be used for p/K/p separation. A diffusion box, lined with millipore, will collect the light from the Cherenkov radiation. Photomultiplier tubes (PMTs) will then detect the light and convert the photons into an electrical signal that electronics will then be able to interpret. This presentation will show the dependence of the aerogel's signal strength on thickness of stack as well as the PMTs' gain dependence on high voltage.
Sandia National Labs Solving the Nation's Most Critical Space Challenges.
Abstract not provided.