Development of miniaturized, spectroscopically assisted Penning gauges for fractional helium and hydrogen neutral pressure measurements | Zendy

Kurt Flesch | Zendy; T. Kremeyer | Zendy; O. Schmitz | Zendy; V. Soukhanovskii | Zendy; U. Wenzel | Zendy

Open Access

Development of miniaturized, spectroscopically assisted Penning gauges for fractional helium and hydrogen neutral pressure measurements

Author(s) -

Kurt Flesch,

T. Kremeyer,

O. Schmitz,

V. Soukhanovskii,

U. Wenzel

Publication year - 2016

Publication title -

review of scientific instruments

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.605

H-Index - 165

eISSN - 1089-7623

pISSN - 0034-6748

DOI - 10.1063/1.4960815

Subject(s) - deuterium , helium , atomic physics , hydrogen , ion , materials science , anode , energetic neutral atom , torr , ion current , helium 3 , sensitivity (control systems) , pressure measurement , analytical chemistry (journal) , physics , chemistry , electrode , thermodynamics , quantum mechanics , chromatography , electronic engineering , engineering

Direct measurements of the helium (He) fractional neutral pressure in the neutral gas around fusion devices is challenging because of the small mass difference between the abundant D2 molecules and the He ash which will be produced by deuterium-tritium fusion. To study He exhaust, an in situ Penning gauge system is being developed at UW-Madison that is optimized for good pressure and high spectroscopic sensitivity. Three different anode geometries have been studied regarding their vacuum electrostatic fields, light output, and ion current. The light output of the two new anode configurations are at least one order of magnitude above the currently available designs, hence improving the spectroscopic sensitivity at similar total neutral pressure resolution.

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