Synchrotron Blowup
If beam spill appears non-linear and QXR seems to be changing as in this plot:
Then this may be a RF/damper/Fuzzer problem and QXR is only attempting to regulate the spill. (and failing as the effect is non-line-locked/random) One may try looking at various beam signals:
and adjust the Tevatron "Fuzzer" scale factor.
To confirm that the Tev "Fuzzer" is working, the Tev Bunch Length Monitor and RF Sum Signal should look like this:
