TY - JOUR
T1 - Transport of neutral atomic hydrogen in a supersonic plasma jet
AU - Mazouffre, S.
AU - Boogaarts, M.G.H.
AU - Mullen, van der, J.J.A.M.
AU - Schram, D.C.
PY - 1999
Y1 - 1999
N2 - In a supersonically expanding plasma jet created by a cascaded arc from an Ar-H2 mixt., spatially resolved densities, temps., and velocities of ground state at. hydrogen are obtained by applying two-photon excitation laser induced fluorescence. The axial velocity profile of H indicates a strong coupling between Ar and H atoms and it can be fully described in terms of a supersonic expansion model. However, whereas H atoms temp. profiles along the jet centerline clearly reveal the presence of a normal shock front, the at. hydrogen d. profiles do not. From the absence of a d. jump across the normal shock front, it is conclude that the at. hydrogen flux in the axial direction is not conserved. There are several indications that the coupling between H and Ar atoms is lost in the course of the expansion and that hydrogen atoms can escape the supersonic domain by a scattering process due to their large mean free path. [on SciFinder (R)]
AB - In a supersonically expanding plasma jet created by a cascaded arc from an Ar-H2 mixt., spatially resolved densities, temps., and velocities of ground state at. hydrogen are obtained by applying two-photon excitation laser induced fluorescence. The axial velocity profile of H indicates a strong coupling between Ar and H atoms and it can be fully described in terms of a supersonic expansion model. However, whereas H atoms temp. profiles along the jet centerline clearly reveal the presence of a normal shock front, the at. hydrogen d. profiles do not. From the absence of a d. jump across the normal shock front, it is conclude that the at. hydrogen flux in the axial direction is not conserved. There are several indications that the coupling between H and Ar atoms is lost in the course of the expansion and that hydrogen atoms can escape the supersonic domain by a scattering process due to their large mean free path. [on SciFinder (R)]
U2 - 10.1111/j.1749-6632.1999.tb08783.x
DO - 10.1111/j.1749-6632.1999.tb08783.x
M3 - Article
SN - 0077-8923
VL - 891
SP - 348
EP - 359
JO - Annals of the New York Academy of Sciences
JF - Annals of the New York Academy of Sciences
IS - Heat and M
ER -