How to reach DESY and the Campus Bahrenfeld are part of the Science City Hamburg Bahrenfeld:
https://www.desy.de/about_desy/getting_there/hamburg/index_eng.html .
If you come by plane, you can reach DESY via the public transport or via taxi. We recommend you to use the route planner https://www.hvv.de for the best connection at the time of your arrival. Tickets for the S-Bahn can be bought at the red machines in the luggage area or in the S-Bahn entrance at the airport. The S-Bahn is marked by a green "S" sign.
Buses number 1 stops at Notkestrasse, while buses number 2, 3, X3 stop close to the second entrance on Luruper Chaussee.
DESY is an open campus and you do not need anything to enter it, just walk in. You may want to ask a map of the Campus at the lodge at the entrances, it may be useful.
The lectures will take place in the CFEL building, building 99, see map below
https://indico.desy.de/event/48195/images/3701-Screenshot%202025-05-09%20at%2012.40.10.png