13-17 October 2014
Das Wormser
Europe/Berlin timezone

Silicon microcalorimeters for high-precision X-ray spectroscopy of highly-charged heavy ions

Not scheduled
Mozartsaal (Das Wormser)


Das Wormser

Das Wormser, Rathenaustraße 11, 67547 Worms, ‎ Tel: 06241/2000420


Saskia Kraft-Bermuth (Justus-Liebig-University Giessen)


High-precision X-ray spectroscopy in highly-charged heavy ions provides a sensitive test of quantum electrodynamics in very strong Coulomb fields, and is, therefore, an established subject within the program of SPARC. To improve the precision of such experiments, the new detector concept of silicon microcalorimeters, which detect the temperature change of an absorber after an incoming photon has deposited its energy as heat, is now exploited. The development of silicon microcalorimeters for hard X-rays has been pursued by GSI and the collaborating groups for more than two decades, and the successful application at the ESR storage ring has been demonstrated in the recent past. With arrays of silicon thermometers and X-ray absorbers made of high-Z material, a relative energy resolution of about 1 per mille is obtained in the energy regime of 50–100 keV. The contribution will discuss the detection principle and achieved performance as well as the technical challenges for applications at FAIR. An overview of potential applications, i.e. Lamb shift measurements, spectroscopy of inner-shell transitions or the determination of nuclear charge radii, will be discussed.
Invited Talk (yes/no)? no

Primary author

Saskia Kraft-Bermuth (Justus-Liebig-University Giessen)


Alexander Bleile (GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI)) Artur Echler (Justus-Liebig-University Giessen) Dan McCammon (University of Wisconsin, Madison, USA) Oleg Kiselev (GSI, Darmstadt) Pascal Scholz (Justus-Liebig-University Giessen) Patrick Grabitz (GSI, Darmstadt) Peter Egelhof (GSI, Darmstadt) Victor Andrianov (Lomonosov Moscow State University, Russia)

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