TY - JOUR
T1 - Towards an Intrinsic Doppler Correction for X-ray Spectroscopy of Stored Ions at CRYRING@ESR
AU - Kroger, Felix Martin
AU - Weber, Günter
AU - Allgeier, Steffen
AU - Andelkovic, Zoran
AU - Bernitt, Sonja
AU - Borovik Jr., Alexander
AU - Duval, Louis
AU - Fleischmann, Andreas
AU - Forstner, Oliver
AU - Friedrich, Marvin
AU - Glorius, Jan
AU - Gumberidze, Alexandre
AU - Hahn, Christoph
AU - Herfurth, Frank
AU - Hengstler, Daniel
AU - Herdrich, Marc Oliver
AU - Hillenbrand, Pierre-Michel
AU - Kalinin, Anton
AU - Kiffer, Markus
AU - Kubullek, Maximilian
AU - Kuntz, Patricia
AU - Lestinsky, Michael
AU - Loher, Bastian
AU - Menz, Esther Babette
AU - Over, Tobias
AU - Petridis, Nikolaos
AU - Pfafflein, Philip
AU - Ringleb, Stefan
AU - Sidhu, Ragandeep Singh
AU - Spillmann, Uwe
AU - Trotsenko, Sergiy
AU - Warczak, Andrzej
AU - Zhu, Binghui
AU - Enss, Christian
AU - Stohlker, Thomas
N1 - Funding Information:
This research was funded by the European Research Council (ERC) under the European Union’s Horizon 2020 research program as well as by the innovation program (grant No. 824 109 “EMP”) and by the Verbundprojekt BMBF grant number 05P2018 (ErUM-FSP T05). We also acknowledge the support provided by ErUM FSP T05—“Aufbau von APPA bei FAIR” (BMBF Nr. 05P19SJFAA and Nr. 05P19VHFA1).
Funding Information:
The authors are indebted to the local teams at GSI, in particular of ESR and CRYRING@ESR, for providing us with an excellent beam. This research has been conducted in the framework of the SPARC collaboration, experiment E138 of FAIR Phase-0 supported by GSI. B.Z. acknowledges CSC Doctoral Fellowship 2018.9–2022.2 (Grant No. 201 806 180 051).
Publisher Copyright:
© 2023 by the authors.
PY - 2023/1/28
Y1 - 2023/1/28
N2 - We report on a new experimental approach for the Doppler correction of X-rays emitted by heavy ions, using novel metallic magnetic calorimeter detectors which uniquely combine a high spectral resolution with a broad bandwidth acceptance. The measurement was carried out at the electron cooler of CRYRING@ESR at GSI, Darmstadt, Germany. The X-ray emission associated with the radiative recombination of cooler electrons and stored hydrogen-like uranium ions was investigated using two novel microcalorimeter detectors positioned under 0∘ and 180∘ with respect to the ion beam axis. This new experimental setup allowed the investigation of the region of the N, M → L transitions in helium-like uranium with a spectral resolution unmatched by previous studies using conventional semiconductor X-ray detectors. When assuming that the rest-frame energy of at least a few of the recorded transitions is well-known from theory or experiments, a precise measurement of the Doppler shifted line positions in the laboratory system can be used to determine the ion beam velocity using only spectral information. The spectral resolution achievable with microcalorimeter detectors should, for the first time, allow intrinsic Doppler correction to be performed for the precision X-ray spectroscopy of stored heavy ions. A comparison with data from a previous experiment at the ESR electron cooler, as well as the conventional method of conducting Doppler correction using electron cooler parameters, will be discussed
AB - We report on a new experimental approach for the Doppler correction of X-rays emitted by heavy ions, using novel metallic magnetic calorimeter detectors which uniquely combine a high spectral resolution with a broad bandwidth acceptance. The measurement was carried out at the electron cooler of CRYRING@ESR at GSI, Darmstadt, Germany. The X-ray emission associated with the radiative recombination of cooler electrons and stored hydrogen-like uranium ions was investigated using two novel microcalorimeter detectors positioned under 0∘ and 180∘ with respect to the ion beam axis. This new experimental setup allowed the investigation of the region of the N, M → L transitions in helium-like uranium with a spectral resolution unmatched by previous studies using conventional semiconductor X-ray detectors. When assuming that the rest-frame energy of at least a few of the recorded transitions is well-known from theory or experiments, a precise measurement of the Doppler shifted line positions in the laboratory system can be used to determine the ion beam velocity using only spectral information. The spectral resolution achievable with microcalorimeter detectors should, for the first time, allow intrinsic Doppler correction to be performed for the precision X-ray spectroscopy of stored heavy ions. A comparison with data from a previous experiment at the ESR electron cooler, as well as the conventional method of conducting Doppler correction using electron cooler parameters, will be discussed
KW - highly charged heavy ions
KW - ion storage rings
KW - precision X-ray spectroscopy
U2 - 10.3390/atoms11020022
DO - 10.3390/atoms11020022
M3 - Article
SN - 2218-2004
VL - 11
SP - 1
EP - 9
JO - Atoms
JF - Atoms
IS - 2
M1 - 22
ER -