Identification of microorganisms using Superconducting Tunnel Junctions and time-of-flight mass spectrometry

J. N. Ullom, Matthias Frank, J. M. Horn, S. E. Labov, K. Langry, W. H. Benner

Research output: Contribution to journalConference article

7 Scopus citations

Abstract

We present time-of-flight measurements of biological material ejected from bacterial spores following laser irradiation. Ion impacts are registered on a microchannel plate detector and on a Superconducting Tunnel Junction (STJ) detector. We compare mass spectra obtained with the two detectors. The STJ has better sensitivity to massive ions and also measures the energy of each ion. We show evidence that spores of different bacillus species produce distinctive mass spectra and associate the observed mass peaks with coat proteins.

Original languageEnglish (US)
Pages (from-to)385-388
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume444
Issue number1
DOIs
StatePublished - Apr 7 2000
Externally publishedYes
Event8th International Workshop on Low Temperature Detectors (LTD-8) - Dalfsen, Neth
Duration: Aug 15 1999Aug 20 1999

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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