Many modern accelerators rely on superconducting radio-frequency (SRF) cavities to accelerate particles. When these cavities are cooled to the superconducting state, a fraction of the ambient magnetic field (e.g., Earth's magnetic field) may be trapped in the superconductor. This trapped flux can significantly increase the power dissipation of the SRF cavities. It is, therefore, crucial to understand the underlying mechanism of how magnetic flux is trapped and what treatments and operating conditions can reduce the flux-trapping efficiency. A new experiment was designed that enables a systemic investigation of flux trapping. It allows for independent control of cooldown conditions, which might have an influence on flux trapping: temperature gradient across the superconductor during cooldown, cooldown rate, and ambient magnetic field. For exhaustive studies, the setup was designed for quick thermal cycling, permitting up to 300 superconducting transitions in one day. In this paper, the setup and operation is described in detail and an estimation of the measurement errors is given. Exemplary data are presented to illustrate the efficacy of the system.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1063/5.0202546 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Volcanic aerosols captured by plants: A study of nanoparticles and their chemical composition.
Sci Total Environ
January 2025
Université Paris Cité - Institut de Physique du globe de Paris, CNRS, F75005 Paris, France.
Nanoparticles (NPs) exhibit high reactivity and mobility in the environment, and a significant capacity to penetrate living organisms, potentially leading to harmful effects. Volcanoes are the second major source of natural NPs emitted into the atmosphere, with an estimated flux of 342 Tg/year. Few studies have focused on their fate.
View Article and Find Full Text PDFRole of cardiolipin in proton transmembrane flux and localization.
Biophys J
December 2024
Laboratoire Jean Perrin, CNRS, Sorbonne Université, UMR 8237, Paris, France. Electronic address:
In eukaryotic cells, the phospholipid cardiolipin (CL) is a crucial component that influences the function and organization of the mitochondrial inner membrane. In this study, we examined its potential role in passive proton transmembrane flux using unilamellar vesicles composed of natural egg phosphatidylcholine (PC) alone or with the inclusion of 18 or 34 mol % CL. A membrane potential was induced by a potassium gradient, and oxonol VI dye was used to monitor membrane potential dissipation resulting from proton transmembrane efflux.
View Article and Find Full Text PDFBreaking the coastal barrier: Typhoons convert estuarine mangroves into sources of microplastics to the ocean.
J Hazard Mater
December 2024
Research Centre for the Oceans and Human Health, City University of Hong Kong, Shenzhen Research Institute, Shenzhen 518057, PR China; School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong. Electronic address:
Estuarine mangroves are crucial for trapping microplastics and contributing to coastal protection; however, their effectiveness during extreme weather events remains unclear. This study investigated the effects of typhoons on microplastic dynamics within the watershed-estuary-offshore system and the changes in the role of estuarine mangroves. Surface water from the Shenzhen River and sediments from estuarine mangroves were sampled after typhoons (Saola and Haikui) and during periods of stable hydrodynamic conditions.
View Article and Find Full Text PDFOptimizing Metabolite Production with Neighborhood-Based Binary Quantum-Behaved Particle Swarm Optimization and Flux Balance Analysis.
J Comput Biol
January 2025
School of Biotechnology, Jiangnan University, Wuxi, China.
Metabolic engineering is a rapidly evolving field that involves optimizing microbial cell factories to overproduce various industrial products. To achieve this, several tools, leveraging constraint-based stoichiometric models and metaheuristic algorithms like particle swarm optimization (PSO), have been developed. However, PSO can potentially get trapped in local optima.
View Article and Find Full Text PDFTillandsia-Inspired Asymmetric Covalent Organic Framework Membranes for Unidirectional Low-Friction Water Collection.
Angew Chem Int Ed Engl
December 2024
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China.
Article Synopsis
- Friction in physical chemistry is crucial for improving membrane performance, particularly by reducing resistance to solvent flow and enhancing water transport at the nanoscale.
- A new porous membrane inspired by the Tillandsia leaf structure was developed using covalent organic frameworks (COFs), featuring a rough hydrophilic inlet and hydrophobic pore channels to minimize solvent pressure and friction.
- The resulting COF membranes effectively harvested fog from the air, achieving a high water harvesting rate while also filtering out small pollutants, showcasing their potential for efficient fluid transport and collection.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!