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A combined segmented anode gas ionization chamber and time-of-flight detector for heavy ion elastic recoil detection analysis
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics. (Plasma Wall Interaction)ORCID iD: 0000-0001-9299-3262
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0001-9901-6296
2016 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 87, no 10, 103303Article in journal (Refereed) Published
Abstract [en]

A dedicated detector system for heavy ion elastic recoil detection analysis at the Tandem Laboratory of Uppsala University is presented. Benefits of combining a time-of-flight measurement with a segmented anode gas ionization chamber are demonstrated. The capability of ion species identification is improved with the present system, compared to that obtained when using a single solid state silicon detector for the full ion energy signal. The system enables separation of light elements, up to Neon, based on atomic number while signals from heavy elements such as molybdenum and tungsten are separated based on mass, to a sample depth on the order of 1 μm. The performance of the system is discussed and a selection of material analysis applications is given. Plasma-facing materials from fusion experiments, in particular metal mirrors, are used as a main example for the discussion. Marker experiments using nitrogen-15 or oxygen-18 are specific cases for which the described improved species separation and sensitivity are required. Resilience to radiation damage and significantly improved energy resolution for heavy elements at low energies are additional benefits of the gas ionization chamber over a solid state detector based system.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2016. Vol. 87, no 10, 103303
National Category
Accelerator Physics and Instrumentation
Research subject
Physics
Identifiers
URN: urn:nbn:se:kth:diva-193638DOI: 10.1063/1.4963709ISI: 000387661900024Scopus ID: 2-s2.0-84990211387OAI: oai:DiVA.org:kth-193638DiVA: diva2:1033309
Funder
EU, Horizon 2020, 633053
Note

QC 20161007

Available from: 2016-10-06 Created: 2016-10-06 Last updated: 2017-11-30Bibliographically approved

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