Important News about the Radiation Safety Requirements

View into the BESSY II experimental hall

View into the BESSY II experimental hall © HZB/M. Setzpfandt

As of 1st April 2020, the experiment hall of BESSY II will no longer be a controlled area but a surveillance area and the users are no more required to have the status as radiation workers. This makes an easier access to the experimental hall possible.


  • a radiation passport or confirmation letter is no longer needed
  • a radiation protection delimitation contract with HZB is no longer needed


  • The personal dosimeter (provided by HZB) and the SSR number (provided once by you) are still necessary.
  • The 7 days visitor regulation is still valid too.

For details please read the Radiation Safety requirements pages: radiation safety.