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Title: Absolute ion detection efficiencies of microchannel plates and funnel microchannel plates for multi-coincidence detection
Authors : Fehre, K.
Trojanowskaja, D.
Gatzke, J.
Kunitski, M.
Trinter, F.
Zeller, S.
Schmidt, L. Ph. H.
Stohner, Jürgen
Berger, R.
Czasch, A.
Jagutzki, O.
Jahnke, T.
Dörner, R.
Schöffler, M. S.
Published in : Review of Scientific Instruments
Volume(Issue) : 89
Issue : 4
Pages : 045112
Publisher / Ed. Institution : AIP Publishing
Issue Date: 22-Mar-2018
License (according to publishing contract) : CC BY 4.0: Namensnennung 4.0 International
Type of review: Peer review (Publication)
Language : English
Subjects : Physics; Instrumentation and Detector
Subject (DDC) : 530: Physics
Abstract: Modern momentum imaging techniques allow for the investigation of complex molecules in the gas phase by detection of several fragment ions in coincidence. For these studies, it is of great importance that the single-particle detection efficiency e is as high as possible, as the overall efficiency scales with e over n, i.e. the power of the number of detected particles. Here we present measured absolute detection efficiencies for protons of several micro-channel plates (MCPs), including efficiency enhanced "funnel MCPs". Furthermore, the relative detection efficiency for two-, three-, four-, and five-body fragmentation of CHBrClF has been examined. The "funnel" MCPs exhibit an efficiency of approx. 90 percent, gaining a factor of 24 (as compared to "normal" MCPs) in case of a five-fold ion coincidence detection.
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific Journal
DOI : 10.1063/1.5022564
ISSN: 0034-6748
Appears in Collections:Publikationen Life Sciences und Facility Management

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