First Experiments with CRYRING@ESR †

ORCID
0000-0001-7384-1917
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Lestinsky, Michael;
GND
129975869X
ORCID
0000-0003-1451-7089
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Menz, Esther Babette;
Affiliation
European Spallation Source, 221 00 Lund, Sweden
Danared, Håkan;
ORCID
0000-0003-1727-8319
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Krantz, Claude;
ORCID
0000-0003-3444-1317
Affiliation
Fysikum, Department of Physics, Stockholm University, 106 91 Stockholm, Sweden
Lindroth, Eva;
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Andelkovic, Zoran;
ORCID
0000-0001-8825-8820
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Brandau, Carsten;
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Bräuning-Demian, Angela;
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Fedotova, Svetlana;
ORCID
0000-0003-1326-9394
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Geithner, Wolfgang;
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Herfurth, Frank;
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Kalinin, Anton;
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Kraus, Ingrid;
ORCID
0000-0001-7281-5063
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Spillmann, Uwe;
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Vorobyev, Gleb;
GND
1156630649
ORCID
0000-0003-0461-3560
Affiliation
GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
Stöhlker, Thomas

The low-energy heavy ion storage ring CRYRING was transported from Stockholm to Darmstadt, modernized and reconfigured, and recommissioned as CRYRING@ESR. The machine is now in operation with all installations in service and is available as a user facility for experiments proposed through the SPARC collaboration. During the 2020–2022 period, we brought a number of experimental installations into service and used them to measure first data: the ultra-cold electron cooler for merged-beam electron–ion collisions, the gas jet target for atomic collisions, a next-generation microcalorimeter-based X-ray spectroscopy setup, and others. Ions can be injected either in low charge states from a local ion source through a 300 keV/u RFQ linac, or in high charge states from the GSI accelerator chain through ESR. This allows for very broad access to ions across the entire periodic table. CRYRING@ESR is able to de- or accelerate ions and cool and store beams of isotopically pure species in a desired charge state. While the analysis is still largely ongoing, the first experimental data already show that the machine reached its expected performance level, and our high expectations regarding achievable resolution in spectroscopy experiments have been fulfilled. With access to new classes of ions available through ESR injection and a new generation of experimental instrumentation, CRYRING@ESR is a unique facility for experiments with heavy, highly charged ions. Here, we will review our present setup and machine performance, discuss the data from our first commissioning experiments and briefly preview the upcoming new installations for the coming years.

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