A Tandem Time--of--Flight Spectrometer for Negative--Ion/Positive--Ion Coincidence Measurements with Soft X-ray Excitation

Research output: Contribution to journalArticle


We present a newly constructed spectrometer for negative--ion/positive--ion coincidence spectroscopy of gaseous samples. The instrument consists of two time--of--flight ion spectrometers and a magnetic momentum filter for deflection of electrons. The instrument can measure double and triple coincidences between mass--resolved negative and positive ions with high detection efficiency. First results include identification of several negative--ion/positive--ion coincidence channels following inner-shell photoexcitation of sulfur hexaflouride (SF$_6$).


  • Christian Stråhlman
  • Rami Sankari
  • Antti Kivimäki
  • Robert Richter
  • Marcello Coreno
  • Ralf Nyholm
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Accelerator Physics and Instrumentation
  • Atom and Molecular Physics and Optics


  • Negative--ion/positive--ion coincidence spectroscopy, time--of--flight mass spectroscopy, synchrotron radiation
Original languageEnglish
Article number013109
JournalReview of Scientific Instruments
Issue number1
Publication statusPublished - 2016
Publication categoryResearch

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Related research output

Stråhlman, C., 2016, MAX IV Laboratory, Lund University. 170 p.

Research output: ThesisDoctoral Thesis (compilation)

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