Sep 16 – 23, 2016
Oak Ridge National Laboratory
US/Eastern timezone

Further uses of fast orbit feedback controllers

Sep 20, 2016, 4:30 PM
Conference Center (Oak Ridge National Laboratory)

Conference Center

Oak Ridge National Laboratory

Building 5200 Oak Ridge National Laboratory Oak Ridge, TN 37831 USA
Regular Talk (15min) Hardware, Driver/Device support EPICS Collaboration Meeting


Matthew Furseman (Diamond Light Source Ltd)


Diamond has had an operational fast orbit feedback system since 2007 which has proved to be reliable through routine use since that time. The implementation of the feedback controllers uses distributed VxWorks IOCs for calculating the required correction values in each corrector magnet. These IOCs are more easily modified than systems using FPGAs, allowing us to introduce additional features into our soft real time control system and control these features using EPICS. We have used this functionality to produce dynamic closed bumps into our electron beam orbit, measure the BPM to corrector response matrix and characterise the response of our corrector magnets. In the future an additional feature we would like to implement is feed-forward suppression of electron beam noise introduced by I10's fast switching chicane.

Primary author

Matthew Furseman (Diamond Light Source Ltd)

Presentation materials