메뉴 건너뛰기




Volumn 80, Issue 6, 2009, Pages

Energetic ion, atom, and molecule reactions and excitation in low-current H2 discharges: Hα Doppler profiles

Author keywords

[No Author keywords available]

Indexed keywords

ADJUSTABLE PARAMETERS; CATHODE MATERIALS; DOPPLER; DOPPLER PROFILE; ELECTRICAL DISCHARGES; ENERGETIC ION; EXCITED ATOMS; GAS DENSITY; HIGH ELECTRIC FIELDS; HYDROGEN IONS; HYDROGEN PARTICLES; KINETIC MODELS; MOLECULE BEHAVIOR; MOLECULE REACTIONS; PARALLEL-PLATE ELECTRODES; SPATIAL DISTRIBUTION; SPECTRAL EMISSIVITY; SPECTRAL INTENSITY; WAVELENGTH SHIFT;

EID: 72449172900     PISSN: 15393755     EISSN: 15502376     Source Type: Journal    
DOI: 10.1103/PhysRevE.80.066401     Document Type: Article
Times cited : (28)

References (65)
  • 2
    • 67650902395 scopus 로고    scopus 로고
    • 10.1103/PhysRevE.79.066401
    • A. V. Phelps, Phys. Rev. E 79, 066401 (2009). The exponent in Eq. (8) of this reference should be b not (b+1). 10.1103/PhysRevE.79.066401
    • (2009) Phys. Rev. E , vol.79 , pp. 066401
    • Phelps, A.V.1
  • 3
  • 8
    • 0012276438 scopus 로고
    • 10.1103/PhysRevA.37.194
    • E. L. Ayers and W. Benesch, Phys. Rev. A 37, 194 (1988). 10.1103/PhysRevA.37.194
    • (1988) Phys. Rev. A , vol.37 , pp. 194
    • Ayers, E.L.1    Benesch, W.2
  • 9
    • 0025484745 scopus 로고
    • 10.1088/0022-3727/23/9/006;
    • C. Barbeau and J. Jolly, J. Phys. D 23, 1168 (1990) 10.1088/0022-3727/23/ 9/006
    • (1990) J. Phys. D , vol.23 , pp. 1168
    • Barbeau, C.1    Jolly, J.2
  • 14
  • 28
    • 0004370546 scopus 로고
    • 10.1088/0031-8949/50/5/007
    • M. Kuraica and N. Konjević, Phys. Scr. 50, 487 (1994). 10.1088/0031-8949/50/5/007
    • (1994) Phys. Scr. , vol.50 , pp. 487
    • Kuraica, M.1    Konjević, N.2
  • 33
    • 61449112043 scopus 로고    scopus 로고
    • 10.1063/1.3079513
    • N. Cvetanović, B. M. Obradović, and M. M. Kruaica, J. Appl. Phys. 105, 043306 (2009). Although this calculation uses different H+ H2 elastic cross sections than that of Ref., we do not expect to result in major differences in results. They derive an energy distribution for the H atoms leaving the cathode that is consistent with their experimental Hα profile rather than calculating it from first priciples as is the present paper. 10.1063/1.3079513
    • (2009) J. Appl. Phys. , vol.105 , pp. 043306
    • Cvetanović, N.1    Obradović, B.M.2    Kruaica, M.M.3
  • 42
    • 26244439275 scopus 로고    scopus 로고
    • 10.1063/1.2010616
    • A. V. Phelps, J. Appl. Phys. 98, 066108 (2005). 10.1063/1.2010616
    • (2005) J. Appl. Phys. , vol.98 , pp. 066108
    • Phelps, A.V.1
  • 49
    • 72449145033 scopus 로고    scopus 로고
    • Vacuum grade POCO graphite, Poco Graphite, Inc., 300 Old Greenwood Rd., Decatur, Texas 76234, USA.
    • Vacuum grade POCO graphite, Poco Graphite, Inc., 300 Old Greenwood Rd., Decatur, Texas 76234, USA.
  • 50
    • 72449187234 scopus 로고    scopus 로고
    • Recent measurements by one of the authors (Z.Lj.P.) for unpolished POCO graphite, which had not been exposed to discharges, gave 6% reflectivity. Our use of H2 discharge cleaning and the resultant layer of sputtered graphite reduces the reflection, while sputtered Au, Pd, and/or stainless steel on the graphite could increase the reflection.
    • Recent measurements by one of the authors (Z.Lj.P.) for unpolished POCO graphite, which had not been exposed to discharges, gave 6% reflectivity. Our use of H2 discharge cleaning and the resultant layer of sputtered graphite reduces the reflection, while sputtered Au, Pd, and/or stainless steel on the graphite could increase the reflection.
  • 51
    • 68949124741 scopus 로고
    • edited by L. C. Pitchford, B. V. McCoy, A. Chutjan, and S. Trajmar (Springer-Verlag, New York
    • B. M. Jelenković and A. V. Phelps, in Swarm Studies and Inelastic Electron-Molecule Collisions, edited by, L. C. Pitchford, B. V. McCoy, A. Chutjan, and, S. Trajmar, (Springer-Verlag, New York, 1985) p. 113. This work with D2 found ∼10% distortion of the spatial distribution of emission when the current was raised to 10 μA. Because of higher ion drift velocities in H2, the electric field distortion for H2 discharges is expected to become significant only for higher currents than for D2.
    • (1985) Swarm Studies and Inelastic Electron-Molecule Collisions , pp. 113
    • Jelenković, B.M.1    Phelps, A.V.2
  • 53
    • 72449192850 scopus 로고    scopus 로고
    • Our maximum discharge current densities are 2× 10-11 A/ m2 compared to 4× 10-6 A/ m2 for a typical dc glow discharge used in Hα Doppler studies.
    • Our maximum discharge current densities are 2× 10-11 A/ m2 compared to 4× 10-6 A/ m2 for a typical dc glow discharge used in Hα Doppler studies.
  • 56
    • 36749119093 scopus 로고
    • 10.1063/1.430929;
    • J. F. Kielkopf, J. Chem. Phys. 62, 3784 (1975) 10.1063/1.430929
    • (1975) J. Chem. Phys. , vol.62 , pp. 3784
    • Kielkopf, J.F.1
  • 57
    • 41449107464 scopus 로고    scopus 로고
    • 10.1051/0004-6361:20078437
    • N. F. Allard, J. F. Kielkopf, R. Cayrel, and C. van't Veer-Menneret, Astron. Astrophys. 480, 581 (2008). We have found no experimental data for H (n=3) broadening by H2 and so use typical values for other neutral and nonresonant species. 10.1051/0004-6361:20078437
    • (2008) Astron. Astrophys. , vol.480 , pp. 581
    • Allard, N.F.1    Kielkopf, J.F.2    Cayrel, R.3    Van't Veer-Menneret, C.4
  • 61
    • 72449127744 scopus 로고    scopus 로고
    • The model of Ref. has been extended to include H+ produced at the anode by electron impact on adsorbed H2. The expected yield of H+ per incident electron for a monolayer coverage of H2 on a tungsten anode is ∼ 10-9. Assuming an extremely large H+ yield of 0.01 per electron for our dirty AuPd operated as an anode and using b=100, the calculated profile shows a roughly 5% increase in the total Hα at negative wavelength shifts relative to that at positive wavelength shifts.
    • The model of Ref. has been extended to include H+ produced at the anode by electron impact on adsorbed H2. The expected yield of H+ per incident electron for a monolayer coverage of H2 on a tungsten anode is ∼ 10-9. Assuming an extremely large H+ yield of 0.01 per electron for our dirty AuPd operated as an anode and using b=100, the calculated profile shows a roughly 5% increase in the total Hα at negative wavelength shifts relative to that at positive wavelength shifts.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.