Gamma-Portal allows for browsing beamtimes, downloading and staging of data taken at DESY or data

taken at external facilities by DESY staff (assuming sufficient permissions to a dataset).

The Portal can also be used to stage data, i.e. copy data from the dCache tape pool to the dCache disc pool. Data can be staged only if the user has a regular DESY account.

During staging, ACLs are created. They grant read-access for the catalogued participants.