Helical instability in metal halide lamps under micro and hypergravity conditions

W.W. Stoffels, F.H.J. van den Hout, G.M.W. Kroesen, M. Haverlag, R. Keijser

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)
101 Downloads (Pure)

Abstract

The onset and rotation frequency of a helical instability in a metal halide lamp is studied for gravity conditions varying from microgravity to 1.8g during parabolic flights and at microgravity in the International Space Station. The results show that gravity-induced convection seriously alters the onset and behavior of the instability. Hypergravity and low lamp power increase the rotation frequency of the instability, which seems independent of the arc pressure. At microgravity conditions, only arc bending and no rotation has been observed. The arc bending increases with lamp power, allowing one to monitor the driving and damping forces of the instability.
Original languageEnglish
Article number091502
Pages (from-to)091502-1/3
Number of pages3
JournalApplied Physics Letters
Volume88
Issue number9
DOIs
Publication statusPublished - 2006

Fingerprint

Dive into the research topics of 'Helical instability in metal halide lamps under micro and hypergravity conditions'. Together they form a unique fingerprint.

Cite this