Markus Schiffer - Academia.edu (original) (raw)
Papers by Markus Schiffer
53Mn Measurement 190321-0008
In dieser Arbeit wurde erfolgreich ein Beschleuniger-Massenspektrometer fur mittelschwere Radionu... more In dieser Arbeit wurde erfolgreich ein Beschleuniger-Massenspektrometer fur mittelschwere Radionuklide am Kolner FN-Tandembeschleuniger berechnet, aufgebaut und getestet. Mit diesem AMS-System konnten (53Mn/55Mn)-Isotopenverhaltnisse im Bereich von 1e-9 bis 1e-10 mit einem Detektionslimit von 7,2e-13 erstmalig an einem 10MV Tandembeschleuniger gemessen werden. Das aufgebaute AMS-System ist dediziert fur den Nachweis von mittelschweren Radionukliden. Es verfugt uber einen achromatischen Injektor mit Fast-Injection-System sowie ein Hochenergie-Massenspektrometer mit einem 90°-Analysiermagneten (rho=1,1 m), hinter dem die Ionenstrome der stabilen Nuklide in Offset-Farady-Cups gemessen werden. Die Isobarenunterdruckung kann uber eine mehrstufige isotopenspezifische Energieverlust-Messung mit Kombinationen aus Siliziumnitrid-Folien, einem 30° elektrostatischen Analysierer (rho=3,5 m), einem 4 m Time-of-Flight-System sowie einem Gasionisationsdetektor erfolgen. Zusatzlich wurde das AMS-Sy...
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
EPJ Web of Conferences, 2020
An automated CO2 gas handling and injection system was developed. It is designed to dilute CO2 sa... more An automated CO2 gas handling and injection system was developed. It is designed to dilute CO2 samples with blank gas in a mixing volume. The system is intended to be used for the characterization and quantification of 14C content in reactor graphite with accelerator mass spectrometry. A 100 kV accelerator system was developed to measure samples with high 14C content, to test the gas injection system and to measure the 3H content from gaseous releases of reactor graphite. Additionally, the Tandetron model 4130 was purchased from the Max-Planck Institute for Biogeochemistry Jena (Germany) and a concept was developed for installation at the accelerator building of the University of Cologne. With the new 3 MV system, new isotopic ratio measurements and ion beam techniques for material analysis can be performed. The system will be used for nuclear waste management measurements of isotopes, e.g. 3H, 14C, 36Cl, 41Ca and 55Fe, which are difficult to measure with other techniques.
Global and Planetary Change, 2019
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
53Mn Measurement 190321-0008
In dieser Arbeit wurde erfolgreich ein Beschleuniger-Massenspektrometer fur mittelschwere Radionu... more In dieser Arbeit wurde erfolgreich ein Beschleuniger-Massenspektrometer fur mittelschwere Radionuklide am Kolner FN-Tandembeschleuniger berechnet, aufgebaut und getestet. Mit diesem AMS-System konnten (53Mn/55Mn)-Isotopenverhaltnisse im Bereich von 1e-9 bis 1e-10 mit einem Detektionslimit von 7,2e-13 erstmalig an einem 10MV Tandembeschleuniger gemessen werden. Das aufgebaute AMS-System ist dediziert fur den Nachweis von mittelschweren Radionukliden. Es verfugt uber einen achromatischen Injektor mit Fast-Injection-System sowie ein Hochenergie-Massenspektrometer mit einem 90°-Analysiermagneten (rho=1,1 m), hinter dem die Ionenstrome der stabilen Nuklide in Offset-Farady-Cups gemessen werden. Die Isobarenunterdruckung kann uber eine mehrstufige isotopenspezifische Energieverlust-Messung mit Kombinationen aus Siliziumnitrid-Folien, einem 30° elektrostatischen Analysierer (rho=3,5 m), einem 4 m Time-of-Flight-System sowie einem Gasionisationsdetektor erfolgen. Zusatzlich wurde das AMS-Sy...
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
EPJ Web of Conferences, 2020
An automated CO2 gas handling and injection system was developed. It is designed to dilute CO2 sa... more An automated CO2 gas handling and injection system was developed. It is designed to dilute CO2 samples with blank gas in a mixing volume. The system is intended to be used for the characterization and quantification of 14C content in reactor graphite with accelerator mass spectrometry. A 100 kV accelerator system was developed to measure samples with high 14C content, to test the gas injection system and to measure the 3H content from gaseous releases of reactor graphite. Additionally, the Tandetron model 4130 was purchased from the Max-Planck Institute for Biogeochemistry Jena (Germany) and a concept was developed for installation at the accelerator building of the University of Cologne. With the new 3 MV system, new isotopic ratio measurements and ion beam techniques for material analysis can be performed. The system will be used for nuclear waste management measurements of isotopes, e.g. 3H, 14C, 36Cl, 41Ca and 55Fe, which are difficult to measure with other techniques.
Global and Planetary Change, 2019
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.