Rostock 2019 – scientific programme

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A: Fachverband Atomphysik

A 10: Highly charged ions and their applications

A 10.4: Talk

Monday, March 11, 2019, 17:00–17:15, S HS 3 Physik

Laser beamline for laser cooling of stored relativistic heavy-ion beams at the SIS100 — •Max Horst^1,2, Daniel Albach^3,5, Gerhard Birkl², Michael Bussmann³, Volker Hannen⁴, Daniel Kiefer², Sebastian Klammes^1,2, Thomas Kühl¹, Markus Löser^3,5, Ulrich Schramm^3,5, Mathias Siebold⁵, Peter Spiller¹, Thomas Stöhlker^1,6,7, Johannes Ullmann^1,4, Thomas Walther², Daniel Winzen⁴, and Danyal Winters¹ — ¹GSI Darmstadt — ²TU Darmstadt — ³HZDR Dresden — ⁴Uni Münster — ⁵TU-Dresden — ⁶HI-Jena — ⁷Uni-Jena

At relativistic velocities, laser cooling is an efficient technique to minimize the momentum spread of stored heavy-ion beams in storage rings. For the future facility FAIR in Darmstadt, this cooling method will be the only one applied to the heavy-ion synchrotron SIS100. The distance from the laser lab to the accelerator, in which the laser beam will be overlapped with an ion beam, is about 25 m crossing two tunnels. For several good reasons, it is best to transport the laser light through a vacuum beamline. However, due to the required mirror setup and multiple optical components, the polarization of the light emerging from the laser beamline will be somewhat modified. To avoid unwanted effects during laser cooling, such as optical pumping, we need to control the polarization of the laser light at the interaction section. We will present the design of the laser beamline, mention some important aspects, and discuss results from recent polarization measurements using a demo setup of the laser beamline.