TUPPM2R2
GSI, Darmstadt, Germany
CASUS, Görlitz, Germany
HZDR, Dresden, Germany
TU Darmstadt, Darmstadt, Germany
Westfälische Wilhelms-Universität Münster, Institut für Kernphysik, Münster, Germany
Technische Universität Dresden, Dresden, Germany
IOQ, Jena, Germany
HIJ, Jena, Germany
HFHF, Frankfurt am Main, Germany
The heavy-ion synchrotron SIS100 is the core machine of the Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany. It will be capable to accelerate very intense beams of heavy ions up to highly relativistic velocities. Laser cooling of bunched ion beams was chosen to reduce the longitudinal momentum spread of the ions in the SIS100. A novel concept will be used, where laser beams from three complementary laser systems (cw and pulsed) will be overlapped in space, time and energy to interact simultaneously with a very broad ion velocity range in order to maximize the cooling efficiency. We will present this project and give an update of its current status. We will also give an overview of the laser and detector systems that will be used at the SIS100.
TUPPM2R3
GSI, Darmstadt, Germany
CASUS, Görlitz, Germany
HZDR, Dresden, Germany
IMP/CAS, Lanzhou, People’s Republic of China
TU Darmstadt, Darmstadt, Germany
Westfälische Wilhelms-Universität Münster, Institut für Kernphysik, Münster, Germany
Universität Kassel, Kassel, Germany
HFHF, Frankfurt am Main, Germany
TU Dresden, Dresden, Germany
IOQ, Jena, Germany
HIJ, Jena, Germany
Laser cooling at storage rings has proven to be a powerful technique to obtain ion with a very small relative longitudinal momentum spread (1E-6 range). This contribution will give an overview of the principle and status of bunched beam laser cooling at the experimental storage ring ESR at GSI, Germany. Results from a recent laser cooling beamtime in May 2021 at the ESR will be presented, where broadband laser cooling of bunched relativistic C3+ ion beams was successfully demonstrated for the first time using a sophisticated pulsed UV laser system with a very high repetition rate (~ MHz), variable pulse durations (166 - 735 ps) and high UV power (> 250 mW).