Characterization of OH Radical 306.4 nm Emission in Argon and Helium Reduced-Pressure ICPs

1987 ◽  
Vol 41 (4) ◽  
pp. 679-682 ◽  
Author(s):  
P. A. Fleitz ◽  
C. J. Seliskar
Keyword(s):  
Flow Rate ◽  
Rotational Level ◽  
Oh Radical ◽  
Reduced Pressure ◽  
Inductively Coupled

The A → X emission of OH at 306.4 nm has been studied in reduced-pressure inductively coupled argon and helium plasmas. Under a variety of conditions of power and flow rate, a comparison of the A state rotational level distributions shows significant differences in the two plasmas. The rotational level distributions are generally nonlinear but can be quantitatively described as the sum of two separate Boltzmann distributions.

Characterization of matrix effects using an inductively coupled plasma-sector field mass spectrometer

2020 ◽  
Vol 35 (9) ◽  
pp. 2033-2056 ◽  
Author(s):  
Shi Jiao ◽  
John W. Olesik
Keyword(s):  
Flow Rate ◽  
Inductively Coupled Plasma ◽  
Gas Flow ◽  
Matrix Effects ◽  
Mass Matrix ◽  
Gas Flow Rate ◽  
Field Mass ◽  
Inductively Coupled ◽  
Comprehensive Characterization

Comprehensive characterization of ICP-SFMS matrix effects as function of analyte mass, matrix mass, focus lens voltage and nebulizer gas flow rate.

scholarly journals Hot Box Investigations of a Ventilated Bioclimatic Wall for NZEB Building Façade

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1327
Author(s):  
Dwinanto Sukamto ◽  
Monica Siroux ◽  
Francois Gloriant
Keyword(s):  
Energy Efficiency ◽  
Flow Rate ◽  
Experimental Setup ◽  
Air Flow Rate ◽  
Space Thickness ◽  
Zero Energy ◽  
Interior Space ◽  
Air Space ◽  
Thermal Metrology

The building sector is the largest consumer of energy, but there are still major scientific challenges in this field. The façade, being the interface between the exterior and interior space, plays a key role in the energy efficiency of a building. In this context, this paper focuses on a ventilated bioclimatic wall for nearly zero-energy buildings (NZEB). The aim of this study is to investigate an experimental setup based on a hot box for the characterization of the thermal performances of the ventilated wall. A specific ventilated prototype and an original thermal metrology are developed. This paper presents the ventilated prototype, the experimental setup, and the experimental results on the thermal performances of the ventilated wall. The influence of the air space thickness and the air flow rate on the thermal performances of the ventilated wall is studied.

scholarly journals Merits of microwave plasmas for optical emission spectrometry – characterization of an axially viewed microwave-sustained, inductively coupled, atmospheric-pressure plasma (MICAP)

2020 ◽  
Vol 35 (10) ◽  
pp. 2369-2377
Author(s):  
Helmar Wiltsche ◽  
Matthias Wolfgang
Keyword(s):  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Optical Emission ◽  
Plasma Source ◽  
Optical Emission Spectrometry ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Microwave Plasmas ◽  
Inductively Coupled

The MICAP is a microwave driven plasma source employing nitrogen as the plasma gas. In this work we compare LODs and LOQs obtained in axial viewing with those obtained by ICP-OES and evaluate the effect of air instead of nitrogen as the plasma gas.

Numerical Characterization of Hot Gas Ingestion Through Turbine Rim Seals

2016 ◽  
Author(s):  
Riccardo Da Soghe ◽  
Cosimo Bianchini ◽  
Carl M. Sangan ◽  
James A. Scobie ◽  
Gary D. Lock
Keyword(s):  
Flow Rate ◽  
Numerical Study ◽  
Axial Flow ◽  
Radial Clearance ◽  
Buffering Effect ◽  
Hot Gas ◽  
Numerical Predictions ◽  
Wide Range ◽  
Thermal Buffering

This paper deals with a numerical study aimed at the characterization of hot gas ingestion through turbine rim seals. The numerical campaign focused on an experimental facility which models ingress through the rim seal into the upstream wheel-space of an axial-turbine stage. Single-clearance arrangements were considered in the form of axial- and radial-seal gap configurations. With the radial-seal clearance configuration, CFD steady-state solutions were able to predict the system sealing effectiveness over a wide range of coolant mass flow rates reasonably well. The greater insight of flow field provided by the computations illustrates the thermal buffering effect when ingress occurs: for a given sealing flow rate, the effectiveness on the rotor was significantly higher than that on the stator due to the axial flow of hot gases from stator to rotor caused by pumping effects. The predicted effectiveness on the rotor was compared with a theoretical model for the thermal buffering effect showing good agreement. When the axial-seal clearance arrangement is considered, the agreement between CFD and experiments worsens; the variation of sealing effectiveness with coolant flow rate calculated by means of the simulations display a distinct kink. It was found that the “kink phenomenon” can be ascribed to an over-estimation of the egress spoiling effects due to turbulence modelling limitations. Despite some weaknesses in the numerical predictions, the paper shows that CFD can be used to characterize the sealing performance of axial- and radial-clearance turbine rim seals.

scholarly journals Speciation of organometals using a synchronizing GC-EIMS and GC-ICPMS system for simultaneous detection

2014 ◽  
Vol 29 (6) ◽  
pp. 1132-1137 ◽  
Author(s):  
Lucia D'Ulivo ◽  
Lu Yang ◽  
Yong-Lai Feng ◽  
John Murimboh ◽  
Zoltán Mester
Keyword(s):  
Gas Chromatography ◽  
Mass Spectrometer ◽  
Inductively Coupled Plasma ◽  
Simultaneous Detection ◽  
Electron Ionization ◽  
Ionization Mass ◽  
Inductively Coupled

Accurate quantitation and characterization of organometals are successfully achieved by splitting the gas chromatography (GC) flow to both an electron ionization mass spectrometer (EIMS) and an inductively coupled plasma mass spectrometer (ICPMS).

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