Temperature-Tunable Heliconical and Ferroelectric Nematics for White Lasing. [PDF]
Adv MaterThe discovery of the ferroelectric nematic (NF) phase in 2017 and the spontaneous symmetry‐breaking of the ferroelectric twist‐bend nematic (NTBF)phase in 2024 have made major breakthroughs in the context of self‐assembly materials. This study presents pioneering temperature and voltage‐tunable lasing in both phases, demonstrating multicolor and in ...
Szukalska AB +6 more
europepmc +2 more sources
Understanding Volatile Electrical Switching in hBN Nanodevices by Fully Optical Operando Investigation. [PDF]
SmallOperando optical characterization of vertical two‐terminal monolayer hexagonal Boron Nitride devices is used to gain new insight into the key role of defects in the dynamics of switching. Characterization of photoluminescence and dark‐field scattering light signals during electrical switching indicates that the formation of conductive filaments of gold
Kelly DM +4 more
europepmc +2 more sources
Two-Color Pyrometer for Process Temperature Measurement During Machining [PDF]
, 2016 A fast fiber-optic two-color pyrometer operating on the optical communication bands is designed for temperature measurements in machining processes. Off-the-shelf low-loss fiber-optic demultiplexers and optoelectronics equipment are used in order to ...
Díaz Álvarez, José +3 more
core +2 more sources
Evolution of Tungsten Fiber‐Reinforced Tungsten‐Remarks on Production and Joining
Advanced Engineering Materials, Volume 25, Issue 19, October 2023., 2023 Material challenges for future fusion reactors demand advanced materials. W‐fiber‐reinforced W‐composite (W f/W) with improved toughness is a promising candidate. It can be produced via chemical vapor deposition or powder metallurgical routes. This review focuses on upscaling W f/W production for fusion applications.
Jan Willem Coenen +8 more
wiley +1 more source
Scanning optical pyrometer for measuring temperatures in hollow cathodes [PDF]
, 2007 Life-limiting processes in hollow cathodes are determined largely by the temperature of the electron emitter. To support cathode life assessment, a noncontact temperature measurement technique which employs a stepper motor-driven fiber optic probe was ...
Dang, L. +5 more
core +1 more source
One‐step fabrication of Li2TiO3 ceramic pebbles using pulsed YAG laser
Journal of the American Ceramic Society, Volume 106, Issue 10, Page 5735-5742, October 2023., 2023 One‐step fabrication of Li2TiO3 pebble using pulsed YAG laser Abstract A large amount of Li‐containing ceramic breeder pebbles is packed in the solid breeding blanket of a nuclear fusion reactor. Several pebble fabrication technologies have been proposed in previous studies, including wet process, emulsion method, extrusion spheronization, additive ...
Keisuke Mukai
wiley +1 more source
Influence of cutting fluid on tool edge temperature in end milling titanium alloy
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2015 This study investigates the influence of cutting fluid on the cutting temperature in end milling of a titanium alloy. As the cutting temperature, the tool edge temperature was measured using a two-color pyrometer with an optical fiber.
Ryutaro TANAKA +4 more
doaj +1 more source
Contributed Review: Absolute spectral radiance calibration of fiber-optic shock-temperature pyrometers using a coiled-coil irradiance standard lamp [PDF]
, 2015 We describe an accurate and precise calibration procedure for multichannel optical pyrometers such as the 6-channel, 3-ns temporal resolution instrument used in the Caltech experimental geophysics laboratory. We begin with a review of calibration sources
Asimow, P. D., Fat’yanov, O. V.
core +1 more source
Construction and Calibration of a Streaked Optical Spectrometer for Shock Temperature
, 2020 Here we describe the implementation and calibration of a streaked visible spectrometer (SVS) for optical pyrometry and emission/absorption spectroscopy on light gas gun platforms in the UC Davis Shock Compression Laboratory. The diagnostic consists of an
Davies, Erik J. +2 more
core +1 more source
A noncontact measurement technique for the density and thermal expansion coefficient of solid and liquid materials [PDF]
, 1996 A noncontact measurement technique for the density and the thermal expansion coefficient of refractory materials in their molten as well as solid phases is presented.
Chung, Sang K. +2 more
core +2 more sources