Results 151 to 160 of about 6,501 (284)
High Voltage, EarlyView.ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang +4 more
wiley +1 more source
Improved image reconstruction in coherent diffraction imaging using self‐seeded XFEL pulses
Journal of Synchrotron Radiation, EarlyView.This study demonstrates that the superior coherence of narrow‐bandwidth self‐seeded X‐ray pulses significantly improves the quality and reliability of image reconstruction in coherent diffraction imaging compared with conventional broad‐bandwidth SASE pulses.
Jaeyong Shin +7 more
wiley +1 more source
Multi-layer Shack-Hartmann wavefront sensing in the point source regime. [PDF]
Biomed Opt Express, 2021 Akondi V, Dubra A.
europepmc +1 more source
Shaped electrodes for adaptive X‐ray optics
Journal of Synchrotron Radiation, EarlyView.For adaptive X‐ray optics on high‐performance beamline optical systems, we describe an approach to mirror figure and slope control using patterned, shaped electrodes to control the local curvature on a lithium niobate substrate from a single applied voltage. Longitudinally continuous electrode patterns achieve target shapes without discontinuities, and
Kenneth A. Goldberg +2 more
wiley +1 more source
Fast eikonal phase retrieval for high‐throughput beamlines
Journal of Synchrotron Radiation, EarlyView.Fast eikonal phase retrieval with complementary local (sub‐pixel) and non‐local (multi‐pixel) solvers strongly suppresses nonlinear streak artefacts in long‐distance propagation‐based phase‐contrast micro‐tomography at high computational efficiency.A fast eikonal phase retrieval formulation is introduced that accelerates eikonal phase retrieval by more
Alessandro Mirone +5 more
wiley +1 more source
Analysis of the astroclimate parameters associated with the tropospheric conditions and their time evolution at Roque de Los Muchachos Observatory [PDF]
, 2012 The early 1970's saw the start of a new era in astronomy with the rst approach to building large telescopes (2 to 5 meters class telescope) and locating them in the right places.
GUERRA-RAMON, JUAN,CARLOS +1 more
core
Air attenuation of high power XFEL beams
Journal of Synchrotron Radiation, EarlyView.The transmission of air, which is used to contain X‐ray beams for radiation safety, is observed to significantly increase with X‐ray power.The Linac Coherent Light Source II, a high‐repetition‐rate X‐ray free‐electron laser (FEL), produces high average power as well as high peak power.
Philip Heimann +11 more
wiley +1 more source
Fundamental Limits to Wavefront Sensing in the Submillimeter
, 2006 With the advent of large-format submillimeter wavelength detector arrays, and a new 25 m diameter submillimeter telescope under consideration, the question of optimal wavefront sensing methods is timely. Indeed, not only should bolometric array detectors
Serabyn, Eugene
core
Journal of Synchrotron Radiation, EarlyView.Lapped Si(111) crystals in a double‐crystal monochromator provide high‐flux, spectrally pure, and moderate‐bandwidth X‐ray beams at 100 keV, offering a robust and cost‐effective alternative to perfect‐crystal and multilayer optics.Lapping the surfaces of Si(111) crystals in a double‐crystal monochromator significantly increases the intensity of high ...
Hiroshi Yamazaki +3 more
wiley +1 more source
EUV and Hard X-ray Hartmann Wavefront Sensing for Optical Metrology, Alignment and Phase Imaging. [PDF]
Sensors (Basel), 2021 de La Rochefoucauld O +7 more
europepmc +1 more source