Users’ Area

Corona-related Safety Regulations for users at PETRA III and FLASH
Corona requires specific rules for the work at PETRA III and FLASH which have to be obeyed strictly. (July 2021) [More]
Routing slip for participants of beamtimes | self-commitment testing
During your stay for beamtime at DESY please carry this document with you. It has to be approved by the DESY Photon Science User Office before you start working at the beamline or lab. The testing self-commitment has to be signed by users who are neither vaccinated nor recovered. This option is offered ONLY for arrivals before 2 December 2021. [More]
Rules for external users (Tests, Quarantine etc)
Users of DESY Photon Science Experimental Facilities (PETRA III, FLASH, DESY NanoLAb etc.) please consult this document for regulations to access DESY user facilities (update 11 November 2021). For any question please contact us via [More]
DESY Guidelines for Corona
General guidelines and regulations for the DESY Campus (as of 1 November 2021) [More]
  • DOOR
    - User Registration - Proposal Submission - Administration of Experiment .....and more
How to reach PETRA III and FLASH
Komitee Forschung mit Synchrotronstrahlung

The User Office has moved to Building 94/O1.013
See this map on how to find us:

Icon map (1.3 MB)
location of the new User Office
The DESY Photon Science User Office has moved to a new building. You will now find us in Building 94/O1.013

Test requirements for users coming to PETRA III / FLASH

Users have to present in the User Office

- a negative molecular biological PCR test for SARS-CoV-2 with the result being not older than 48 hrs when coming on campus. Vaccination or recovery from Covid-19 will not release users from this obligation.
- proof of vaccination/recovery is required for participation in beamtime. Accepted vaccines are listed here

These rules are effective for all users arriving at DESY Wednesday, November 24th or later.

Interim rules apply for users who are NOT vaccinated or NOT recovered with arrival date before December 2nd, 2021
  a) present a negative PCR test BEFORE starting your beamtime in the User Office (as before)
  b) signing self-commitment (download right hand side of this webpage with routing slip) to carry out daily self-tests during your stay at DESY (tests available in the User Office) and present it at User Office.

A maximum number of up to six persons are allowed for experiments at PETRA III, up to nine persons are allowed for experiments at FLASH. However, do not send more persons than needed for the experiment.

Further details on regulations for the access to PETRA III and FLASH
are outlined in the pdf documents on the right hand side of this webpage.

Leader and PI of proposals with scheduled beamtimes will be informed via e-mail about changes of regulations.

General travel regulations for people coming to Germany

All persons coming from abroad have to provide a proof of vaccination/recovery or a negative test result, i.e. PCR-Test (max. 72h) or Antigen-Test (max. 48h).

All travellers coming from an international risk area as defined by German authorities have to register online via

Please note different regulations for
1) 'high incidence areas'
For persons coming from a high incidence area a 10-day quarantine is required. As soon as a proof of complete vaccination (with a vaccine accepted by the EU ) or of recovery is uploaded via the online travel registration, the quarantine can be terminated.
For persons without vaccination or recovery, the quarantine can be termined after 5 days by uploading a negative test result.

2) 'areas of variant of concern' NO VISIT AT DESY POSSIBLE!

DESY Hostel does not offer quarantine rooms for DESY users

Fast Track Access for research related to COVID-19 is possible

Synchrotron radiation sources and FELs offer cutting-edge research possibilities in all areas of applied and fundamental natural sciences and in the field of medical diagnosis. At present, PETRA III and FLASH host more than 20 beamlines and more than 60 experimental stations and setups. The main experimental applications comprise X-ray spectroscopy, X-ray diffraction or imaging, X-ray scattering, X-Ray protein crystallography, VUV/XUV spectroscopy/scattering and FEL experiments with soft X-rays (XUV).