Helmholtz-Zentrum Berlin-Adlershof, Wilhelm-Conrad-Röntgen-Campus, is located in the neighbourhood "Adlershof". Please see for details in the map above. The workshop venue is the green "Bunsen Saal" on Tuesday, 12.06.18, and Thursday, 14.06.18 for the plenary sessions.
The parallel ARD and DTS sessions on Wednesday, 13.06.18 take place in the light blue venue "Lecture Hall" of HZB main building, and the light green "Cinema" in the HZB building 13.10.
https://www.helmholtz-berlin.de/zentrum/locations/standort/index_de.html#c475820
https://www.helmholtz-berlin.de/zentrum/locations/standort/wegbeschreibung-ah/index_de.html
https://www.helmholtz-berlin.de/zentrum/locations/standort/wegbeschreibung-ah/index_en.html
Airport Tegel is about 90 min´s by public transport. Jump on a bus there, X109 or TXL, which brings you to the next S-Bahn station on the "Ring", and change there to a Ring-S-Bahn in clockwise direction, until "Ostkreuz". At Ostkreuz, or "Treptower Park" at the latest, it´s necessary to leave the Ring. Change to a S-Bahn direction "Zeuthen", "Grünau" or "Schönefeld" and get off at "Adlershof". From there you can get on the bus 164 or Tram 61/63 until "Magnusstraße". Or you walk. Tickets are always AB. Don´t forget to validate them before the trip. Use the little machines until you hear the "pling"-noise. Ticket control is frequent and mercyless.
Airport Schönefeld is closer. In front of the terminal B the convenient direct bus line 164 direction "S-Bahn Köpenick" departs and stops at "Magnusstraße". It´s approximately 20 min´s to BESSY. Tickets are ABC, available at the driver.
If you come to Berlin by train to "Südkreuz" or "Hauptbahnhof", please use the public transport to Adlershof and Magnusstraße: http://www.bvg.de/en
Tickets from there are AB.
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Always remember Tony Wheeler, the inventor of the "Lonely Planet" travel guides: "Getting there is half the fun."