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    A Beam Profile Monitor for Rare Isotopes in Accelerator Mass Spectrometry: Preliminary Measurements

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    Author
    Taccetti, F.
    Carraresi, L.
    Fedi, M. E.
    Manetti, M.
    Mariani, P.
    Tobia, G.
    Mandò, P. A.
    Issue Date
    2010-01-01
    
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    Show full item record
    Citation
    Taccetti, F., Carraresi, L., Fedi, M. E., Manetti, M., Mariani, P., Tobia, G., & Mandò, P. A. (2010). A beam profile monitor for rare isotopes in accelerator mass spectrometry: Preliminary measurements. Radiocarbon, 52(2), 272-277.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    Description
    From the 20th International Radiocarbon Conference held in Kona, Hawaii, USA, May 31-June 3, 2009.
    URI
    http://hdl.handle.net/10150/654106
    DOI
    10.1017/S0033822200045306
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    In accelerator systems, beam lines are generally equipped with diagnostic elements, such as Faraday cups and beam profile monitors (BPM), to optimize beam transport. These diagnostic elements, or at least commercial ones, are designed to only work with continuous beams, and their typical maximum sensitivity is about few tens of pA. Thus, in the case of diagnosis of rare isotope beams in accelerator mass spectrometry (AMS), Faraday cups and BPMs are not suitable on the high-energy side of the tandem accelerator, after energy-mass-charge analysis. For example, in 14C AMS, even for a modern sample, the expected counting rate is a few tens of Hz; in these conditions, a commercial BPM cannot be used. On the other hand, checking the shape and the position of the rare isotope beam hitting the detector can be important in order to better identify signals in the detector itself, thus also helping in reducing the measurement background. This paper presents a prototype BPM especially designed for low-intensity beams. The BPM is based on a multiwire proportional chamber characterized by 2 grids of anode wires, oriented perpendicular to each other in order to measure both the x and the y coordinates of the particle impact point. Details about the design and the electronics of the device are given, and the first test measurements are discussed.
    Type
    Proceedings
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S0033822200045306
    Scopus Count
    Collections
    Radiocarbon, Volume 52, Number 2 (2010)

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