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Improvement of the accuracy in measuring cryogenic hot spot mix by multi-channel Ross filter pairs through a two-temperature model of hot spot electron temperature.
Rev Sci Instrum
January 2025
Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China.
In inertial confinement fusion experiments, hot spot mix caused by hydrodynamic instabilities is a critical performance limitation. Currently, multi-channel Ross filter pair imaging is used to quantitatively diagnose the mix mass of cryogenic hot spots driven by 100 kJ energy, but this method brings significant uncertainty. To measure the level of mix more accurately, we have developed a two-temperature model to modify the fitted bremsstrahlung spectra based on the characteristics of cryogenic implosion hot spots.
View Article and Find Full Text PDFProbing hidden leptonic scalar portals using the NA64 experiment at CERN.
Eur Phys J C Part Fields
October 2024
Bogoliubov Laboratory of Theoretical Physics, JINR, 141980 Dubna, Russia.
In this study, we demonstrate the potential of the NA64 experiment at CERN SPS to search for New Physics processes involving transitions after the collision of 100 GeV electrons with target nuclei. A new Dark Sector leptonic portal in which a scalar boson could be produced in the lepton-flavor-changing bremsstrahlung-like reaction, , is used as benchmark process. In this work, we develop a realistic Monte Carlo simulation of the NA64 experimental setup implementing the differential and total production cross-section computed at exact tree-level and applying the Weiszäcker-Williams phase space approximation.
View Article and Find Full Text PDFVoxel-based tumor dose correlates to complete pathologic necrosis after transarterial radioembolization for hepatocellular carcinoma.
Eur J Nucl Med Mol Imaging
October 2024
Department of Radiology, University of California San Diego, 200 West Arbor Drive, Mail Code 8756, San Diego, CA, USA.
Purpose: The transarterial radioembolization (TARE) dose is traditionally calculated using the single-compartment Medical Internal Radiation Dose (MIRD) formula. This study utilized voxel-based dosimetry to correlate tumor dose with explant pathology in order to identify dose thresholds that predicted response.
Methods: All patients with HCC treated with TARE using yttrium-90 [Y] glass microspheres at a single institution between January 2015 - June 2023 who underwent liver transplantation were eligible.
Toward a multi-layer micro-structured detector for high-energy electron radiotherapy.
Med Phys
September 2024
Brigham and Women's Hospital, Boston, Massachusetts, USA.
Background: The use of electron beams has been rekindled by the advent of ultra-high-dose rate radiotherapy (FLASH) and very high energy electrons (VHEE). The need for development of novel technology for beam monitoring and dosimetry of such beams is of paramount importance prior to their clinical translation.
Purpose: In this work we explore the potential of a multi-layer nanoporous aerogel High-Energy-Current (HEC) detector as a dosimeter for electron beam.
New structural-optical effect in LiF-LiBO thin-film structures in the crystallization.
Luminescence
April 2024
Institute of Electron Physics, Uzhhorod, Ukraine.
The effect of optical radiation during the phase transition from the amorphous to the crystalline state of matter was investigated for the first time. The results were obtained on nanoscale films of (LiF)(LiBO) compositions by sputtering on cold Ni substrates. The starting materials for films were chosen due to their wide use for tissue-equivalent ionizing radiation dosimetry.
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