Conference paper

Publication year: 2017

Pages: 323-325

Journal: Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms

Volume number: 408

ISSN: 0168-583X

eISSN: 1872-9584

DOI Link: https://doi.org/10.1016/j.nimb.2017.04.078

Conference: 18th International Conference on the Physics of Highly Charged Ions (HCI)

Publisher: Elsevier

Abstract: 
X-ray spectroscopy on highly charged heavy ions provides a sensitive test of quantum electrodynamics in very strong Coulomb fields. One limitation of the current accuracy of such experiments is the energy resolution of available X-ray detectors for energies up to 100 keV. To improve this accuracy, a novel detector concept, namely the concept of microcalorimeters, is exploited for this kind of measurements. The microcalorimeters used in the present experiments consist of silicon thermometers, ensuring a high dynamic range, and of absorbers made of high-Z material to provide high X-ray absorption efficiency. Recently, besides an earlier used detector, a new compact detector design, housed in a new dry cryostat equipped with a pulse tube cooler, was applied at a test beamtime at the experimental storage ring (ESR) of the GSI facility in Darmstadt. A U89+ beam at 75 MeV/u and a Xe-124(54+) beam at various beam energies, both interacting with an internal gas jet target, were used in different cycles. This test was an important benchmark for designing a larger array with an improved lateral sensitivity and statistical accuracy. (C) 2017 Elsevier B.V. All rights reserved.

Harvard Citation style: Scholz, P., Andrianov, V., Echler, A., Egelhof, P., Kilbourne, C., Kiselev, O., et al. (2017) High-precision X-ray spectroscopy of highly-charged ions at the experimental storage ring using silicon microcalorimeters, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 408, pp. 323-325. https://doi.org/10.1016/j.nimb.2017.04.078

APA Citation style: Scholz, P., Andrianov, V., Echler, A., Egelhof, P., Kilbourne, C., Kiselev, O., Kraft-Bermuth, S., & McCammon, D. (2017). High-precision X-ray spectroscopy of highly-charged ions at the experimental storage ring using silicon microcalorimeters. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 408, 323-325. https://doi.org/10.1016/j.nimb.2017.04.078