The Advanced Photon Source
a U.S. Department of Energy Office of Science User Facility

APS Operations and General User Programs During the COVID Pandemic

Beginning October 1, 2020, the start of the 2020-3 beamline run, the Advanced Photon Source (APS) welcomes back Argonne employees and collaborative access team (CAT) operations staff to conduct onsite research at APS beamlines.

The APS user program will support:

  • Mail-in/remote access work for any research involving low-risk samples and most medium-risk samples as defined on the Experiment Safety Assessment Form (ESAF).
  • Experiments proposed by users, who have prior APS experience, that cannot be performed remotely and that meet specific criteria. These proposals will be considered on a case-by-case basis with no guarantee of approval. Contact for more information.

At this time, non-Argonne employee requests that require external user presence to conduct experiments at the APS should be sent to These candidate experiment proposals will be reviewed on a case-by-case basis and will require approval by the Photon Sciences Associate Lab Director.

Remote and mail-in access proposals remain a priority. Experiments approved for onsite access are limited to two users onsite per ESAF, with preference given to experiments that require only one onsite user.

The links below should provide you with details to submit a general user or COVID proposal and other important links. For administrative assistance, please contact the APS User Office at For technical assistance on COVID proposals, please contact Bob Fischetti at



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