Results 11 to 20 of about 52,062 (306)

Surface charging and dose monitor on geosynchronous orbit satellite

Open Astronomy, 2023
Based on the typical dielectric materials and devices of satellite, a surface charging and dose monitor (SCAD) was developed to measure the surface charging voltage, current, and dose under different shielding depths.
Zheng Yuzhan, Zhang Qingxiang, Xiang Hongwen, Yao Shuai, Zheng Yi, Quan Lin   +5 more
doaj   +2 more sources

Reduction of surface charging effects in laser ablation ionisation mass spectrometry through gold coating.

J Anal At Spectrom, 2023
In femtosecond Laser Ablation Ionisation Mass Spectrometry (fs-LIMS) short laser pulses are used to ablate, atomise, and ionise solid sample material shot-by-shot. When ablating non-conductive samples electric charging of the surface can occur. Depending
Gruchola S, Riedo A, Schmidt PK, de Koning CP, Knecht LN, Tulej M, Westall F, Wurz P.   +7 more
europepmc   +2 more sources

Surface Charging on Insulating Films with Different Thicknesses in UPS

Applied Sciences
The conventional view holds that ultraviolet photoelectron spectroscopy (UPS) measurements are not applicable to insulating materials due to interference from charging effects.
Lei Zhu, Xuefeng Xu
doaj   +2 more sources

Finite-element analysis for surface discharge on polyimide insulation in air at atmospheric pressure under pulsed electrical stress

High Voltage, 2020
A surface discharge non-equilibrium plasma model of air–polyimide under pulsed electrical stress is established, by considering the reaction of charged particles on the dielectric surface and the secondary electron emission caused by the condition that ...
Guojing Dong, Qingmin Li, Tao Liu, Haoyu Gao, Minhao Zhang   +4 more
doaj   +1 more source

Gas–solid interface charge characterisation techniques for HVDC GIS/GIL insulators

High Voltage, 2020
Surface charge accumulation on the spacers is one of the key issues restraining the development of HVDC GIS/GIL. The precise measurement of surface charge properties provides the basis for further study of the surface charge transport mechanism as well ...
Lei Zhang, Chuanjie Lin, Chuanyang Li, Simone Vincenzo Suraci, Geng Chen, Uwe Riechert, Uwe Riechert, Tohid Shahsavarian, Masayuki Hikita, Youping Tu, Zhousheng Zhang, Davide Fabiani, Jinliang He, Jinliang He   +13 more
doaj   +1 more source

Influence of N2 pressure on surface discharge characteristics of PEEK under positive repetitive square voltage

High Voltage, 2021
PEEK (polyetheretherketone) and N2 are used in the packaging of high‐voltage power electronics as the frame material and insulation gas, respectively. The surface discharge behaviours of PEEK in N2 under positive repetitive square voltage are the main ...
Ye Li, Xuebao Li, Wei Meng, Zhibin Zhao, Xiang Cui   +4 more
doaj   +1 more source

The surface charge of trypanosomatids [PDF]

Anais da Academia Brasileira de Ciências, 2002
The surface charge of trypanosomatids was evaluated by means of the binding of cationic particles, as visualized by electron microscopy and by direct measurements of the electrophoretic mobility of cells. The results obtained indicate that most of the trypanosomatids exhibit a negatively charged surface whose value is species specific and varies ...
openaire   +5 more sources

Tribo-electric Charging and Adhesion of Cellulose Ethers and their Mixtures with Flurbiprofen [PDF]

, 2014
The pervasiveness of tribo-electric charge during pharmaceutical processing can lead to the exacerbation of a range of problems including segregation, content heterogeneity and particle surface adhesion.
Šupuk, Enes, Conway, Barbara R., Ghori, Muhammad U.   +2 more
core   +1 more source

Transient surface charging of tri‐post insulator in SF6‐filled direct current gas‐insulated transmission lines: Effects of electric conductivity, gas pressure, and voltage amplitude

IET Generation, Transmission & Distribution, 2022
The transient surface charging characteristics of a tri‐post insulator in a ± 500 kV direct current gas‐insulated transmission lines (DC‐GIL) filled with sulfur hexafluoride (SF)6 gas are investigated.
Xiaolong Li, Guangkuo Zhang, Chen Cao, Yan Shi, Ying Lin, Wenzhi Chang   +5 more
doaj   +1 more source

Surface contact charging

Physical Review E, 2017
Experiments in several laboratories have demonstrated that identical materials brought into repeated contact generate unexplained and growing surface charge domains. Here we show that the growth of charge from these experiments can be fitted to a previously developed first-principles model for contact charging based on feedback of random surface ...
Troy Shinbrot, Matthew Rutala, Hans Herrmann   +2 more
openaire   +4 more sources