Berlin 2024 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 6: Instrumentation and Methods for Micro- and Nanoanalysis
KFM 6.3: Vortrag
Montag, 18. März 2024, 11:20–11:40, TC 010
MULTIPAC, a versatile TDPAC spectrometer — •Björn Dörschel1, Ian Yap1, Thien Dang1, Juliana Schell1,2, Nicole De Lima3, Magnus Hagelund4, Bruno Correa3, Arnaldo Filho3, Alexandre Souza5, and Doru Lupascu1 — 1Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany — 2Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany — 3Universidade de São Paulo, 158 Av. Prof. Luciano Gualberto, Brazil — 4Institute of Material Science and Production, University of Aalborg, 9220 Aalborg, Denmark — 5Idaho National Laboratory, 1955 N Fremont Ave, Idaho Falls, ID 83415, USA
MULTIPAC is a spectrometer that can perform γ-γ time-differential perturbed angular correlation (γ-γ TDPAC) experiments under controlled conditions such as an applied external magnetic field up to 8.5 T and temperatures ranging between 3 to 375 K. MULTIPAC differs from conventional γ-γ TDPAC spectrometers in the use of modern multi-pixel photon counters (MPPC), which offers advantage over the standard photomultiplier tubes, due to its compact size, resistance to magnetic fields, ease of maintenance, and requiring only low voltage. Additionally, the MPPC maintains the same quantum efficiency (< 25%) and the high gain (*10^{5-6}) comparable to that of a photo multiplier tube. In addition, MULTIPAC also features a vibrating sample magnetometer (VSM) to leverage upon the field provided by its inbuilt superconducting magnet.
Keywords: Ion implantation; Radioactivity; Hyperfine structure; Perturbed-angular correlation; Multiferroics materials