Results 181 to 190 of about 2,139 (219)

Coupling corona discharge for ambient extractive ionization mass spectrometry

The Analyst, 2011
Unlike the extractive electrospray ionization (EESI) technique described elsewhere, a corona discharge instead of electrospray ionization has been utilized to charge a neutral solvent spray under ambient conditions for the generation of highly charged microdroplets, which impact a neutral sample plume for the extractive ionization of the analytes in ...
Bin, Hu, Xinglei, Zhang, Ming, Li, Xuejiao, Peng, Jing, Han, Shuiping, Yang, Yongzhong, Ouyang, Huanwen, Chen   +7 more
openaire   +2 more sources

Absorption of Photo‐Ionizing Radiation of Corona Discharges in Air

Plasma Processes and Polymers, 2008
AbstractThe absorption characteristics of photo‐ionizing VUV radiation emitted by corona discharges in the pressure range from 20 to 750 Torr in dry and humid air were measured. The experimental results are compared with data and approximation formulae obtained by others. For a wide region of pressure and absorption path length, the formula proposed by
Märt Aints, Ants Haljaste, Toomas Plank, Leho Roots   +3 more
openaire   +1 more source

Experimental Studies on Corona Discharge Ionization

IOSR Journal of Applied Physics, 2013
This study investigates the possibility of corona discharge ionization technique for reduction of fog. For corona discharge ionization a high voltage power supply is designed and developed indigenously. The high output voltage is developed by using isolation transformer, autotransformer, and high voltage neon transformer and it is converted into DC ...
openaire   +1 more source

Basic characteristics of self‐control corona discharge air ionizer

IEEJ Transactions on Electrical and Electronic Engineering, 2016
We propose a self‐controlling corona discharge air ionizer for the static neutralization of electronic products in manufacturing processes. This air ionizer automatically generates only the quantity of ions required to neutralize a charged product, without the need for a control system.
Takashi Sato, Takashi Ikehata, Takashi Terashige, Kazuo Okano   +3 more
openaire   +1 more source

Experimental and theoretical investigation of para-aminophenol ionization in corona discharge

Journal of Molecular Structure, 2015
Abstract Ionization of para-aminophenol was investigated using an ion mobility spectrometer equipped with a corona discharge as ionization source. The experimental results were confirmed with the use of theoretical method, based on density functional theory.
H. Bahrami, H. Salehabadi
openaire   +1 more source

Experimental study of the ionization of flowing gases by DC corona-discharge

32nd AIAA Plasmadynamics and Lasers Conference, 2001
In this paper the authors have focused on characterizing a DC corona ionization device. The device is composed of a flat-plate aluminum anode, and a Re-W cylindrical cathode filament. A stable plasma is created by gas breakdown in a radial-axially symmetrical electric field generated by a high voltage DC power supply.
Stelu Deaconu, Hugh Coleman, S. Wu
openaire   +1 more source

Alternating current corona discharge/atmospheric pressure chemical ionization for mass spectrometry

Rapid Communications in Mass Spectrometry, 2013
RATIONALE Although alternating current (ac) corona discharge has been widely used in the fields of material science and technology, no reports have been published on its application to an atmospheric pressure chemical ionization (APCI) ion source. In this work, ac corona discharge for an APCI ion source has been
Ahsan, Habib, Dilshadbek, Usmanov, Satoshi, Ninomiya, Lee Chuin, Chen, Kenzo, Hiraoka   +4 more
openaire   +2 more sources

A unipolar corona discharge microfabricated ionizer structure for gases at atmospheric pressure and composition

17th IEEE International Conference on Micro Electro Mechanical Systems. Maastricht MEMS 2004 Technical Digest, 2004
To miniaturize airborne participates sizing and counting apparatus for ubiquitous deployment in air quality monitoring and epidemiological studies, we developed a unipolar corona discharge microfabricated ionizer structure for gases at atmospheric pressure and composition.
Tien, NC, McCormick, DT, Chua, BL, Holmen, B, Wexler, AS, Shih, WP, Li, Z, Niemeier, DA   +7 more
openaire   +2 more sources

Ionization phenomenon in high-density gaseous and liquid argon in corona discharge experiments

Journal of Physics D: Applied Physics, 1997
Experimental investigations of corona discharge in Ar for a wide region of fluid density from a rare gas up to a liquid have been carried out. Corona current has been observed for a point cathode voltage above the threshold value . Values of have been measured for a wide range of fluid density N and for different cathode radii .
N Bonifaci, A Denat, V Atrazhev
openaire   +1 more source

[On-drift spectrometer with double successive separation with ionization in the corona discharge].

Aviakosmicheskaia i ekologicheskaia meditsina = Aerospace and environmental medicine, 2007
An experimental high-resolution ion-drift spectrometer is described. Operating characteristics were improved by installation of a second grid gate in the center of the drift space. The ion-drift analyzer setups and the ranges of amplitude, length and temporary delay of control impulses were identified in the course of testing.
B L, Avetisiants, N V, Krasnov, R I, Paul's, A V, Samokish, V A, Samokish, Iu I, Khasin, Iu V, Pepeliaev   +6 more
openaire   +1 more source