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A Langmuir–Taylor detector, also called surface ionization detector or hot wire detector, is a kind of ionization detector used in mass spectrometry, developed by John Taylor[1] based on the work of Irving Langmuir and K. H. Kingdon.[2]
Construction
This detector usually consists of a heated thin filament or ribbon of a metal with a high work function (typically tungsten or rhenium). Neutral atoms or molecules that strike the filament can boil off as positive ions in a process known as surface ionization, and these may be either measured as a current or detected, individually, using an electron multiplier and particle counting electronics.
Applications
This detector is mostly used with alkali atoms, having a low ionization potential, with applications in mass spectrometry and atomic clocks.
References
Taylor, John (1930). "The Reflection of Beams of the Alkali Metals from Crystals". Physical Review. 35 (4): 375–380. Bibcode:1930PhRv...35..375T. doi:10.1103/PhysRev.35.375.
Langmuir, Irving (1925). "Thermionic Effects Caused by Vapours of Alkali Metals". Proceedings of the Royal Society A. 107 (741): 61–79. Bibcode:1925RSPSA.107...61L. doi:10.1098/rspa.1925.0005.
vte
Mass spectrometry
Mass m/z Mass spectrum MS software Acronyms
Ion source
AMS APCI APLI APPI CI DAPPI DART DESI DIOS EESI EI ESI FAB FD GD IA ICP LAESI MALDI MALDESI MIP PTR SESI SIMS SS SSI SELDI TI TS
Mass analyzer
Sector Wien filter Time-of-flight Quadrupole mass filter Quadrupole ion trap Penning trap FT-ICR Orbitrap
Detector
Electron multiplier Microchannel plate detector Daly detector Faraday cup Langmuir–Taylor detector
MS combination
MS/MS QqQ Hybrid MS GC/MS LC/MS IMS/MS CE-MS
Fragmentation
BIRD CID ECD EDD ETD HCD IRMPD NETD SID
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