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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.

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At least 145 records · Page 8
All sourcesNASA NTRSDOE OSTI
DOE OSTI2023

A 50 kA Superconducting Transformer for the Upcoming High-Field High-Current Testing Station at the BNL

Brookhaven national laboratory is upgrading its existing user facility to support R&D for High Energy Physics (HEP) and Fusion Energy Sciences (FES). The goal of this upgrade is to host the testing of the superconducting cables, conductors, joints and insert coils under high magnetic field (10 T), with currents up to 50 kA (present limit 20 kA) and at temperatures varying from 4 K to 40 K. To provide a current up to 50 kA to the sample, a superconducting core-less transformer is under construction. The superconducting transformer would additionally reduce the heat loss at the current leads at high currents. The SC transformer consists of two coaxial coils. The primary coil is inside the secondary coil. The primary coil consists of 3048 turns of rectangular wires (1.91 mm x 1.27 mm), wound in 24 layers. The secondary coil consists of 13 turns of the secondary cable (18.35 mm x 5.96 mm), wound in one layer. The parameters of the transformer are chosen to satisfy the space restrictions while using the available conductor. Here this paper presents the design of the 50-kA transformer.

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗
DOE OSTI2019

Performance of 112 MHz SRF Gun at BNL

A 112 MHz SRF electron photoinjector (gun) was developed at Brookhaven National Laboratory to produce high-brightness and high-bunch-charge bunches for the coherent electron cooling proof-of-principle experiment. The gun is designed to deliver electrons with a kinetic energy of up to 2 MeV. Electrons are generated by illuminating a high quantum efficiency (QE) K2CsSb photoemission layer with a green laser operating at a wavelength of 532 nm. The gun was able to generating 3 nC bunches at 1.7 MeV. The design goals, fabrication, performance and operational experience are reported here.

43 PARTICLE ACCELERATORS↗
DOE OSTI2012

High-brightness picosecond ion beam source based on BNL Terawatt CO 2 laser: Proof-of-principle experiments

Under the continuing DOE support, we have: o assembled the basic experiment setup and then continued expanding it to include diverse diagnostics and to accommodate gas jet targets in addition to metal foils; o conducted an extensive study of our novel laser, significantly enhanced laser beam diagnostics, and improved relevant laser parameters; o turned our experiments into a truly international endeavor with active collaboration of close to 20 researchers in US, UK, and Germany; o conducted the first ever experiments with proton and ion acceleration by lasers interacting with overcritical plasma of gas jets; o for the first time directly observed radiation pressure acceleration of protons, including quasi-monoenergetic spectra promising for future applications; o for the first time directly observed quasi-stable, bubble-like plasma structures that likely evolved from relativistic laser-plasma solitons (post-solitons). Thus, we have confirmed a strong potential of a picosecond TW CO2 laser as a research tool in laser-plasma science and as a promising vehicle for future applications of laser ion acceleration. This has led to apparent increase of the interest in mid-IR laser ion acceleration. In particular, another major research group began extensive proton acceleration experiments with their own CO2 laser at UCLA. As a result, the mechanisms responsible for laser proton acceleration in gas jets have become somewhat clearer. It is also important to note that modest DOE funding played the role of a seed support ensuring the formation of a multinational research team, whose members contributed its time and equipment with value well in excess of that seed amount.

43 PARTICLE ACCELERATORS↗
DOE OSTI2012

Multi-slit Based Emittance Measurement Study for BNL ERL

A code for determining the beam emittance from a multi-slit image has been developed. To verify its validity, we simulated a beam distribution in 4D phase space at the multi-slit position and the resulting image at a downstream profile measurement device. We applied the algorithm to this image pattern to recover the beam emittance at the slit position. The dependence of the relative difference of the inferred emittance and the input emittance on the slit width and drift length are studied in detail and presented in this report.

43 PARTICLE ACCELERATORS↗
DOE OSTI2012

Multi-slit Based Emittance Measurement Study for BNL ERL

A code for determining the beam emittance from a multi-slit image has been developed. To verify its validity, we simulated a beam distribution in 4D phase space at the multi-slit position and the resulting image at a downstream profile measurement device. We applied the algorithm to this image pattern to recover the beam emittance at the slit position. The dependence of the relative difference of the inferred emittance and the input emittance on the slit width and drift length are studied in detail and presented in this report.

43 PARTICLE ACCELERATORS↗
DOE OSTI2013

Proceedings of RIKEN BNL Research Center Workshop: Jet Quenching at RHIC vs LHC in Light of Recent dAu vs pPb Controls [Slides]

In the last decade of the RHIC physics program, studies of jet quenching has played an important role in the discovery and detailed characterization of the strongly interacting Quark-Gluon Plasma. However, these studies also generated several critical puzzles, such as the azimuthal anisotropy of jet quenching, heavy flavor energy loss and initial state suppression, hinting at missing ingredients in our current understanding of jet quenching. Now only two years into the data taking, LHC has produced new measurements on a variety of existing and new jet quenching observables, over a much broader kinematic range.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
DOE OSTI2015

Recycling of spent batteries from electric drive vehicles (BNL-GIPP-372)

This project seeks to develop unique, energy efficient high temperature furnace technology and auxiliary equipment (e.g. material handling, cooling and electrical circuits, etc.). The furnace technology would become a critical element of the technology for recycling and reuse of high value materials from spent lithium-ion batteries for electric vehicles.

25 ENERGY STORAGE↗
DOE OSTI2015

BNL-393: An energetically effective, technically simple and stable-acting plasma-arc furnace (PAF) having power-supply with a rectangular characteristic

The aim of the project is to develop the energetically effective, technically simple and stable-acting plasma-arc furnace having power-supply with a rectangular characteristic. In accordance with that, project provide for the development and making the demonstration sample of the electric-arc plasma furnace which will fed from the power source with a natural (no electronics, and without feedbacks), rectangular, volt-ampere characteristic (PAF-PNRCh) having capacity 50 kW.

42 ENGINEERING↗
DOE OSTI2017

Highlights from BNL and RHIC 2014

This report provides an overview of activities performed with the Relativistic Heavy Ion Collider at Brookhaven National Laboratory.

43 PARTICLE ACCELERATORS↗
DOE OSTI2017

Highlights from BNL and RHIC 2015

This report provides an overview of the activities performed with the Relativistic Heavy Ion Collider at Brookhaven National Laboratory.

43 PARTICLE ACCELERATORS↗
DOE OSTI2017

BNL Support of c-Si PVMC (Final Report)

Collaborative research to improve the performance of as-manufactured thin-wafer crystalline-silicon based solar photovoltaic devices.

99 GENERAL AND MISCELLANEOUS↗
DOE OSTI2014

A white paper: The Cornell-BNL FFAG-ERL Test Accelerator

This white paper describes a project that promises to propel high-power, high-brightness electron beam science and applications to an exciting new level. The collaborative effort between Brookhaven and Cornell will be a model for future projects between universities and national lab, taking advantage of the expertise and resources of both to investigate new topics in a timely and cost-effective manner.

43 PARTICLE ACCELERATORS↗
DOE OSTI2018

Proceedings of RIKEN BNL Research Center Workshop: The Definition of Jets in a Large Background

Jets, the collimated spray of particles produced by a high momentum quark or gluon, have been a key observable in high-energy particle and heavy ion physics. While in general, observables should be clearly defined with the same definition used in both theory and experiment, this has always been challenging for measurements of jets. Since the fragmentation of partons into final state hadrons is not calculable perturbatively and final state particles cannot be assigned unambiguously to particular partons, jet definitions rely on algorithms to reconstruct jets and select which particles are clustered into which jet. Defining a jet is particularly challenging when the jets are surrounded by particles from a high multiplicity underlying event such as those in heavy ion collisions, high luminosity proton-proton or electron-ion collisions. The community currently faces similar issues regarding jet definitions to those faced in particle physics in the preceding decades.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗