News and Updates
Today, the REIXS beamline resumed general user operations. The beamline repair was very successful and we are operating once again at full capacity. As many of you may know, after last year’s extended shutdown due to the electron gun failure, REIXS experienced another failure. The breakdown in our mono was caused by a failure of the in-vacuum bearings used to translate the optics (changing mirror coatings and gratings). This failure occurred in late January, however, we were still able the run the remainder of the shifts in January and February at reduced capability. The scope of the repair included bringing in the original vendor to replace the bearings and re-coating the upstream mirror. There was a design change of the bearings that hopefully will significantly improve the lifetime of the currently installed bearings. An additional configuration change of the optics (requiring the upstream mirror to be recoated) will minimize motion of these in-vacuum bearings. Moreover, the motorization of the stages have been adjusted to further increase the lifetime of the bearings.
The REIXS monochromator suffered a breakdown on January 18, 2019. As a result, we are not able to change gratings and are planning to complete repairs during the upcoming outage (March – May 2019). However, we need to properly condition the mirror and gratings with x-ray beam using a considerable amount of general user shifts. For this reason, we will not be accepting any beamtime requests or new user proposals for the upcoming cycle. If you still wish to submit a general user proposal, you are welcome to do so and a beamtime request can be made against this proposal for Cycle 31 (January – June 2020) during the next call, but we recommend waiting until the next call for proposals before making any submissions. Please do not hesitate to contact Ronny Sutarto or Teak Boyko if you have any further questions. We apologize for any inconvenience this may have caused.