Bohrs Heliumlinien

Abstract

die in einem Echelon gesehene Struktur dieaer Linie sei bemerkt, daB in meinem Echelon von den. Komponenten der 4686-Gruppe folgende zu aehen sind: 1. die starke Komponente 4685,809; 2. eine zweite starke Linie, welche urn 0,094 A.-E. nach kleineren Wellenliingen von der ersten entfernt liegt. Dime enthiilt iibereinandergelsgert die Komponente 4685,703 und die niichste Ordnung der Komponenten 4685,388. AuBerdem ist 3. die schwache Komponente 4685,905 getrennt von anderen Komponentm da. Es scheint, daB das Komponentenbild, welches obige Beobaohter in ihrem Echelon gemhen haben, iihnlich ist. Die Zuordnung der gesehenen Komponentan wurde in oben gegebener Weise erst durch die Analyse mit dem g r o h Konkavgitter entschieden.

Uniqueness Theorem for the Non-Local Ionization Source in Glow Discharge and Hollow Cathode

“…Existence and uniqueness of   , ; , g   r v r v are consequences of those for kernels 1 g and K , which are include ula fo , and unambiguity of finite number of operati …”

“…Such definition of the norm is convenien in the sense that the norms of the operator 1 D and its reverse operator 1 g are equal to unit, and they turn out to be restricted and continuous automatically. These norms have ph sense: they are equal to the total flow of "fast" electrons from n tributed source in all vol ge.…”

“…The problem of creation of the hollow cathode theorythe theory for a glow discharge device in gases, which was invented by Paschen almost yet hundred years ago [1], producing anomalously high currents at the same voltages of discharge compared the glow discharge devices, which have no geometry of hollow cathode-considerably stipulated for non-local ionization. The classical theory of the Engel and Shteenbeck cathode sheath [2] for glow discharge in simple geometry used the Townsend formula for a source of ionization [3], which had in mind local dependence of ionization on the electric field.…”

Geometrical Aspects of a Hollow-cathode Magnetron (HCM)

“…7,8 One of the early studies on magnetized hollow cathode discharges was performed by Lidsky et al 9 These employed a uniform magnetic field parallel to the central axis of the hollow cathode tube. The aspect ratio was typically large, R a ~ 10 and the HCS diameter small, D ~ 1 cm.…”

Application of weakly ionized plasmas for materials sampling and analysis

“…In 1916, Paschen replaced the typical planar cathode of a Geissler discharge tube with aluminum foil bent to form a hollow box-lik e shape open at both ends [55]. Paschen' s work marked the birth of the hollow cathode discharge (HCD), an emission source which has enj oyed widespread use as a line source for atomic absorption spectroscopy since the late 1950's.…”