If the samples included in your EA are significantly different (i.e. different or additional edges/materials) to those on the original, peer-reviewed proposal that was awarded beamtime, you must first contact the beamline team and provide a justification for variation from the approved, peer-reviewed proposal. In addition to this justification, you must supply a new “Proposed Experiment” section, that must include a sample table conforming to the guidelines presented here. Experiments with new samples must still substantially reflect the original proposal, such that 80% of the experiment is devoted to the original peer-reviewed science. The beamline team will not process your EA until the justification, updated Proposed Experiment section and updated Sample Table have been received by the beamline team. Thus, you should begin the process well before the EA deadline.

Request checklist

• New proposed experiment section

• New sample table using the template:

• Justification document:

  • Justification for the inclusion of new edges/samples

  • Section demonstrating 80% of the experiment remains devoted to the original peer-reviewed science.

Sustainability measures and beamline mode changes on Friday

The beamline team carefully schedules experiments based on the experience of the user group (as described in the beamtime proposal) and the beamline configuration required.

The beamline team will refuse such requests. Experience has demonstrated that it is not tractable to induct and train a user group to operate the beamline independently over the weekend AND rush to complete a suite of samples in one beamline mode early enough so the mode change can occur before the beamline scientist goes home. As a result of newly introduced sustainability measures. Beamline staff are no longer on-call in the evenings or over the weekends, so there is no opportunity for beamline staff to perform mode change and the associated calibrations after hours.