Results 81 to 90 of about 2,139 (219)

Atmospheric. pressure air direct current glow discharge ionization source for ion mobility spectrometry [PDF]

, 2008
A new atmospheric pressure air direct current glow discharge (DCGD) ionization source has been developed for ion mobility spectrometry (IMS) to overcome the regularity problems associated with the conventional Ni-63 source and the instability of the ...
Wang, Weiguo, Dong, Can, Li, Haiyang
core   +1 more source

Ultrasonic Piezoelectric Nebulization of Propoxur for the Determination by Corona Discharge Ionization Ion Mobility Spectrometry

Analytical Sciences, 2019
Propoxur insecticide as a thermally unstable compound (decomposed at its boiling point) could not be analyzed by traditional sample introduction systems based on the thermal desorption. In this study, an ultrasonic piezoelectric nebulizing injection port was applied for evaporating this compound prior to its determination by corona discharge ionization
TABIBI, Alireza, JAFARI, Mohammad T.
openaire   +3 more sources

Study on the Coupled Effects of High‐Speed Airflow and Charged Sand on Power‐Frequency Discharge Characteristics of Conductor–Tower Gaps in Strong Wind–Sand Environments

High Voltage, EarlyView.
ABSTRACT Strong wind–sand weather in Xinjiang threatens power grid safety by increasing transmission line tripping risks. Existing studies focus on sand polarization but neglect the coupled influence of high‐speed airflow and charged sand on gap discharge characteristics.
Jianghai Geng, Yang Wang, Ping Wang, Yang Lu, Songsong Zhou, Yujian Ding, Xiaojun Zhang, Wenbing Zhuang, Yu Su   +8 more
wiley   +1 more source

Research on the Audible Noise Spectrum Characteristics of Typical AC Bundled Conductors in High‐Altitude Areas at 4300 m

High Voltage, EarlyView.
ABSTRACT The low pressure in high‐altitude areas exacerbates the issue of audible noise (AN) caused by intense corona discharge on the conductor surface. This problem is a critical factor in the structural design and conductor selection for extra‐high‐voltage and ultrahigh‐voltage (UHV) AC transmission lines.
Wangling He, Jie Liu, Baoquan Wan, Jianbin Fan, Jilai Xu, Xingfa Liu, Yanzhao Wang, Jun Zhao, Xiaojuan Li   +8 more
wiley   +1 more source

Three-species negative corona discharge simulations using domain decomposition [PDF]

, 2015
A three-species model for steady-state negative corona discharge has been considered, with focus on geometries occurring in electrostatic precipitators and automotive spray painting. The model incorporates electrons as well as positive and negative ions,
Svedung Wettervik, Benjamin
core   +3 more sources

The influence of superimposed DC current on electrical and spectroscopic characteristics of HiPIMS discharge

AIP Advances, 2018
The electrical characteristics and spectroscopic properties have been comprehensively investigated in a DC superimposed high power impulse magnetron sputtering (DC-HiPIMS) deposition system in this paper.
Xiao Zuo, Rende Chen, Jingzhou Liu, Peiling Ke, Aiying Wang   +4 more
doaj   +1 more source

Investigation of the Partial Discharge Inception and Flashover With IEC‐Based Comparative Tracking Index Electrodes and Comparison With Homogeneous and Inhomogeneous Electric Fields at Varying Pressures for Aerospace Applications

High Voltage, EarlyView.
ABSTRACT For designing aeronautical components, the creepage distance is usually estimated by considering the pollution level and the dielectric material group as defined by the standard IEC 60664‐1. The material group is expressed by the comparative tracking index (CTI) performed at atmospheric pressure following the standard IEC 60112.
Somya Anand, Mohammed El Amine Slama, Pierre Henrard, Michaël Darques, Solomon Berihu Araya   +4 more
wiley   +1 more source

Design and Implementation of a Negative Ion Generator Based on MQ-135 Sensor and Arduino Nano

Emitor: Jurnal Teknik Elektro
This paper presents an enhanced study on the design, modeling, and implementation of a Negative Ion Generator (NIG) based on the MQ-135 air-quality sensor and Arduino Nano microcontroller.
Dwi Anie Gunastuti, M. M. Lanny W. Panjaitan, Lukas Lukas   +2 more
doaj   +1 more source

PD trending and TVA test readings are good indicators of the condition of aged stator bar insulation. [PDF]

, 2012
Includes bibliographical references.Keeping generators available on-line is a major factor in achieving maximum productivity in power generation. During operation, generator components are continuously exposed to thermal, electrical, mechanical and ...
Mark Anthony Bruintjies, Bruintjies, Mark Anthony   +1 more
core  

An approach for unipolar corona discharge in N2/O2 gas mixture by considering townsend conditions [PDF]

, 2011
In this study (alpha/p)=f(E/p) functional relation is derived for the gas mixture of N-2/O-2 by considering Townsend approach, and formation mechanism of corona discharge is investigated for the coaxial electrode system located in this gas medium.
Alisoy, Hafiz Z., Yesil, Ali, Unal, Ibrahim, Ali Yesil, Murat Koseoglu, Koseoglu, Murat, Ibrahim Unal, Hafiz Z. Alisoy   +7 more
core   +1 more source