A moving-mirror Michelson interferometer for probing transient plasma plumes

Nai Ho CHEUNG*, Lun Chiu Ng, Shu Chi Chen

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

1 Citation (Scopus)


A modified Michelson interferometer was used to probe the electron density in plasma plumes produced by pulsed XeCl laser ablation of Al2O 3. With one of the mirrors of the interferometer translating steadily, the phase angle of the sinusoidal interference signal was tracked and the XeCl laser was fired whenever the detected phase angle matched a predefined value. The transient interference waveform produced by the plasma plume was then synchronously captured. This moving-mirror interferometer features minimal vibration isolation, fast response time (∼10 ns), powerful noise rejection, and a detection limit of a thousandth of a fringe shift, or ∼1015 electrons per cm3 for mm size plumes.

Original languageEnglish
Pages (from-to)49-51
Number of pages3
JournalReview of Scientific Instruments
Issue number1
Publication statusPublished - 1993

Scopus Subject Areas

  • Instrumentation


Dive into the research topics of 'A moving-mirror Michelson interferometer for probing transient plasma plumes'. Together they form a unique fingerprint.

Cite this