Last edited by Akinolkis
Wednesday, October 14, 2020 | History

2 edition of Spectroscopic study of recombination in the early afterglow of a helium plasma found in the catalog.

Spectroscopic study of recombination in the early afterglow of a helium plasma

JoМ€rgen Stevefelt

Spectroscopic study of recombination in the early afterglow of a helium plasma

by JoМ€rgen Stevefelt

  • 102 Want to read
  • 17 Currently reading

Published by Aktiebolaget Atomenergi in Stockholm .
Written in English

    Subjects:
  • Helium plasmas.,
  • Helium -- Spectra.

  • Edition Notes

    Bibliography: p. 30-32.

    Statement[by] J. Stevefelt.
    SeriesAE-311, AE (Series) (Stockholm, Sweden) ;, 311.
    Classifications
    LC ClassificationsTK9008 .A77 no. 311
    The Physical Object
    Pagination32 p.
    Number of Pages32
    ID Numbers
    Open LibraryOL5155529M
    LC Control Number74386057

    typical three-body recombination time. The goal of this study is achieving the required plasma conditions using a capillary discharge z-pinch apparatus. The experimental setup includes a 90mm alumina capillary coupled to a pulsed power generator of ~60 kA peak current, with a rise time of ~60ns. BureauofStandardsJournalofResearch [vol.2 whereN+ istheconcentration,V+theaveragekineticenergy,andM themassoftheions;aistheareaofthesheatharoundthewire File Size: KB.

      Gas and surface phase chemistries of C F 4 plasma were studied in an inductively coupled modified gaseous electronics conference reference cell, using in situ Fourier transform infrared spectroscopy enhanced by a multipass White cell and in situ spectroscopic by: Cambridge Core - Atomic Physics, Molecular Physics and Chemical Physics - Dissociative Recombination of Molecular Ions - by Mats LarssonCited by:

    plasma []. In this study, we have carried out the experimental observation and modelling of molecular ions in hydrogen plasma in a linear plasma device, TPD-SheetIV []. Measurements of the densities of molecular and atomic ions were carried out in hydrogen plasma with a hydrogen gas puff. Author(s): Cai, Laizhong | Abstract: Detached plasma has been observed on different fusion devices, such as DIII-D, JET. Traditionally, Electron-Ion Recombination (EIR) is considered the dominant volume recombination process to cause detachment in detaching divertors. However, evidence for a new process, Molecular- Activated Recombination (MAR), was found both in PISCES-A and NAGDIS-II, Author: Laizhong Cai.


Share this book
You might also like
My poetry ...

My poetry ...

Recent developments in experimental economics

Recent developments in experimental economics

Worlds greatest sleuth!

Worlds greatest sleuth!

Jubilee of foreign missions connected with the Presbyterian Church in Canada, 1844-1894

Jubilee of foreign missions connected with the Presbyterian Church in Canada, 1844-1894

Appointment and pay of supervisors of elections and special marshals.

Appointment and pay of supervisors of elections and special marshals.

Preliminary Bedrock Geological Map of the Plymouth Quadrangle and Eastern Portion of the Killington Peak Quadrangle Windsor and Rutland, Gregory J. Walsh et al.

Preliminary Bedrock Geological Map of the Plymouth Quadrangle and Eastern Portion of the Killington Peak Quadrangle Windsor and Rutland, Gregory J. Walsh et al.

Prediction of university achievement at the University of Guelph

Prediction of university achievement at the University of Guelph

Recent Transportation Literature for Planning and Engineering Librarians

Recent Transportation Literature for Planning and Engineering Librarians

Barnett Frummer is a unbloomed flower

Barnett Frummer is a unbloomed flower

Air cleaning in accident situations

Air cleaning in accident situations

Aspects of single nucleon transfer reactions induced by polarised beams.

Aspects of single nucleon transfer reactions induced by polarised beams.

Britannica Discovery Library: Numbers

Britannica Discovery Library: Numbers

Spectroscopic study of recombination in the early afterglow of a helium plasma by JoМ€rgen Stevefelt Download PDF EPUB FB2

Recombination radiation of H 2 /He plasma is analyzed by OES measurement. T e by continuum spectra agrees with that by LTE levels within 10% accuracy. For N e, the agreement is found to be about 20–25%. Conventional theory of recombination continuum explains the spectra very well.

• The theory of free-bound transition was successfully validated in the present by: 4. Spectroscopic Study of Low-Frequency Helium DBD Plasma Jet Article in IEEE Transactions on Plasma Science 40(11) November with Reads How we measure 'reads'. recombination of Ar+ and ArH+ ions is very slow than it is obvious that even at [H 2] ≈ 1×10 11 cm-3 plasma is at t > 10 ms dominated by recombination of H3+ ions and their ambipolar diffusion.

t Ar H 2 He Figure 1. The scheme of the Flowing Afterglow with Langmuir Probe (FALP) apparatus. Indicated are He, Ar and H2 entry ports. Study of recombining plasmas resulting from a neutral gas injection has been made in a high density steady-state plasma. Recently, the inverted popula Cited by: 1.

Recombination of H3+ with electrons was studied in a low temperature plasma in helium. The plasma recombination rate is driven by two body, H3+ + e, and three-body, H3+ + e + He, processes with. The work of this dissertation, A Study of Minority Atomic Ion Recombination in the Helium Afterglow, overlaps a similar study which followed this by Drs.

Hicks and R. Burton, who extended the methods described here to sit-uations where the molecular ion is the minority ion. A common problem to both of these studies was the verificationAuthor: William E.

Wells. Recombination in He/Ar Afterglow Plasma at Low Temperatures. Dohnal, P. Rubovič, T. Kotrík, R. Plašil, and J. Glosík. Charles University, Faculty of Mathematics and Physics, Prague, Czech Republic. Abstract. A flowing afterglow study of the recombination processes occurring in an Ar +.

New Advanced Integrated Stationary Afterglow (AISA) apparatus was built to study the recombination in helium-hydrogen plasma. The plasma is generated in He (pressures 1 to Torr) with small admixture of Ar and H2 by a pulsed microwave generator with the pulse duration 2–5 ms and the repetition t 40 and 60 ms.

A Langmuir probe is used to measure the time evolution of the Cited by: 5. nation as a dominant process of the afterglow plasma decay. Reported here is the study of the atomic excitation and recombination processes in the ms-pulsed GD plasma, with main emphasis on the afterglow or post-pulse region.

The afterglow exhibits an intense post-pulse signal maximum (known as. In this study, a systematic spectroscopic characterization of a low-temperature plasma (LTP) probe operated with He/N 2 gas mixtures is carried out.

The influence of several experimental parameters (e.g., different He/N 2 gas mixtures, discharge voltage, and gas flow rate) on the dielectric-barrier discharge afterglow was was found that an increase of the nitrogen concentration in.

Optical Spectroscopy of Recombining Ions in Flowing Afterglow Plasmas R. Johnsen, M. Skrzypkowski, T. Gougousi, R. Rosati, and M.F. Golde University of Pittsburgh Key words: Introduction.

Spectroscopy has been an important tool in studies of dissociative recombination (DR) for many years. Experimental investigation of the collisional-radiative decay coefficient of doubly ionized helium atoms in a helium plasma produced by laser is reported.

Comparison of our experimental values with the theoretical values determined by Drawin-Emard is made. A reasonable agreement is obtained if we take into account the optical thickness of the by: 5.

Plasma recombination is a process by which positive ions of a plasma capture a free (energetic) electron and combine with electrons or negative ions to form new neutral atoms ().Recombination is an exothermic reaction, meaning heat releasing reaction.

Recombination usually takes place in the whole volume of a plasma (volume recombination), although in some cases it is confined to some special High energy: QCD matter, Lattice QCD, Quark–gluon. Optical Spectroscopy of Recombining Ions in Flowing Afterglow Plasmas 3 simple when only a single-ion species is present and when ambipolar diffusion is very slow.

In general, numerical solutions are required. Since the intensity of emissions that result from short-lived radiating recombination. study. Because the present RF plasma is an ionizing plasma[3], we describe the model of the ionizing plasma for simplicity.

Collisional-radiative model for helium atom For atomic helium, a collisional-radiative model de-veloped in Ref.[2,4–6] was used. The population of the This study analyzes the recombination of hydrogen and helium in the early universe. Specifically, I examined whether looking at hydrogen and helium as two different entities causes any noticeable changes in the formation of structures in the early universe.

: Spectroscopic studies in solid helium (): Adrian Hofer: Books. Skip to main content. Try Prime EN Hello, Sign in Account & Lists Sign in Account & Lists Orders Try Prime Cart. Books. Go Search Best Sellers Gift Ideas New Releases Whole Foods Today's Author: Adrian Hofer.

Reaction Chemistry in the Afterglow of an Oxygen-Helium, Atmospheric-Pressure Plasma windows so that spectroscopic measurements of the gas could be made. A slit was placed across the flow path upstream of the plasma to provide for a uniform flow velocity across the duct.

The neutral gas temperature was recorded as a function. This option allows users to search by Publication, Volume and Page Selecting this option will search the current publication in context.

Selecting this option will search all publications across the Scitation platform Selecting this option will search all publications for the Publisher/Society in contextCited by: NASA-CR_3 Recombination of H3 + and D3 + Ions in a Flowing Afterglow Plasma T.

Gougousi, R. Johnsen Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA and M.F. Golde Department of Chemistry, University of Pittsburgh. Abstract The analysis of flowing afterglow plasmas containing H3 + or D3 ÷ ions indicates.

Mazankova V. et al.: Study of Nitrogen Atom Recombination by Optical Emission Spectroscopy 52 23118 v I 11 7. (4) The N atom concentration determined from tration determined in equation (4) is shown in Fig. 3 as a function of decay time.

These N atom concentrations were multiplied by a constant so that they can be.spectroscopic data from SSX to determine best-fit values for the plasma parameters of interest. We also used time-dependent simulations to study the plasma’s approach to ionization/excitation equilibrium after spheromak formation.

models all significant radiative and colli-including three-body processes, although not charge exchange. Spectroscopic study and numerical simulation of low-pressure radio-frequency capacitive discharge with argon downstream Murat Tanişli et al Canadian Journal of Physics 1. Crossref. Optical diagnostics with radiation trapping effect in low density and low temperature helium plasma Wonwook Lee et al Physics of Plasmas 23 Crossref.