Assessment of Hydrocarbon Electron‐Impact Ionization Cross Section Measurements for Magnetic Fusion

Huber, S.; Seebacher, Josef; Kendl, A.; Reiter, D.

doi:10.1002/ctpp.201100029

Cited by 11 publications

(14 citation statements)

References 22 publications

(65 reference statements)

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“…73 Both 56 so their fits are by a few percent higher than the present recommended cross sections. Huber et al 20 applied formulae Eq. (7) to partial cross sections measured by Feil et al 67 Parameters of their fits are given in Table 11.…”

Section: Analytical Fits Of Partial Cross Sectionsmentioning

confidence: 99%

“…17,18 The role of acetylene in fusion plasmas has also been considered. 19,20 Acetylene is well-known from combustion, where oxy-acetylene flames provide particularly hot (;3000 K) flames which are in routine everyday use. Acetylene is also an important component of cool carbon-rich stars 21 whose spectra require considerable data to model.…”

Section: Introductionmentioning

confidence: 99%

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Cross Sections for Electron Collisions with Acetylene

Song¹,

Yoon²,

Cho

et al. 2017

Journal of Physical and Chemical Reference Data

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Cross section data are compiled from the literature for electron collisions with the acetylene (HCCH) molecule. Cross sections are collected and reviewed for total scattering, elastic scattering, momentum transfer, excitations of rotational and vibrational states, dissociation, ionization, and dissociative attachment. The data derived from swarm experiments are also considered. For each of these processes, the recommended values of the cross sections are presented. The literature has been surveyed through early

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Section: Analytical Fits Of Partial Cross Sectionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cross Sections for Electron Collisions with Acetylene

Song¹,

Yoon²,

Cho

et al. 2017

Journal of Physical and Chemical Reference Data

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“…The dissociative ionization of molecular ions is a very complex process and there may exist mechanisms other than dipole transitions [28,34] such as Coulomb explosion, Auger, and autoionization processes. A similar discrepancy has been also observed at relatively low-energy electron impacts with hydrocarbons for the nondominant dissociation products [34].…”

Section: Ion Speciesmentioning

confidence: 99%

Dissociative-ionization cross sections for 12-keV-electron impact on CO2

et al. 2011

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The dissociative ionization of a CO 2 molecule is studied at an electron energy of 12 keV using the multiple ion coincidence imaging technique. The absolute partial ionization cross sections and the precursor-specific absolute partial ionization cross sections of resulting fragment ions are obtained and reported. It is found that ∼75% of single ionization, 22% of double ionization, and ∼2% of triple ionization of the parent molecule contribute to the total fragment ion yield; quadruple ionization of CO 2 is found to make a negligibly small contribution. Furthermore, the absolute partial ionization cross sections for ion-pair and ion-triple formation are measured for nine dissociative ionization channels of up to a quadruply ionized CO 2 molecule. In addition, the branching ratios for single-ion, ion-pair, and ion-triple formation are also determined.

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“…been compiled in the HYDKIN database [11,12], which includes (dissociative) electron ionization cross sections, recombination cross sections as well as dissociative electron excitation cross sections.…”

Section: Introductionmentioning

confidence: 99%

“…Emission spectra for electron projectiles [11][12][13][14] as well as for photo-excitation [21][22][23] were reported. In contrast to photo-excitation, electron impact implies also optically forbidden excited states and monitors their subsequent decay to lower states.…”

Section: Introductionmentioning

confidence: 99%

Electron impact excitation of methane: determination of appearance energies for dissociation products

Danko

Országh

Ďurian

et al. 2013

J. Phys. B: At. Mol. Opt. Phys.

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In this work, we present an experimental study of dissociative excitation of CH 4 utilizing a crossed electron molecular beam experiment. Methane was excited by nearly monochromatic electrons generated by a trochoidal electron monochromator. The dissociative products were identified on the basis of the emission spectra in the ultraviolet-visible (UV/VIS) spectral range. The excitation functions were recorded as the function of the electron energy for different emission bands of the fragments (Balmer series for H: n = 3,4 . . . 9→2, and moreover, CH: A 2 →X 2 , CH: B S 0 ). From the experimental data we have determined the threshold energies for excitation of particular fragments. Present experimental results indicate that the threshold energies for some dissociative excitation channels could be lower by ∼1-2 eV in comparison to earlier studies and indicate that different dissociative processes may be operative at the threshold than assumed in the former studies.

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Assessment of Hydrocarbon Electron‐Impact Ionization Cross Section Measurements for Magnetic Fusion

Cited by 11 publications

References 22 publications

Cross Sections for Electron Collisions with Acetylene

Cross Sections for Electron Collisions with Acetylene

Dissociative-ionization cross sections for 12-keV-electron impact on CO2

Electron impact excitation of methane: determination of appearance energies for dissociation products

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