Separator mass resolution is an engineering issue, not a beam dynamics issue.
Transmission is a beam physics issue.
After 9 years, we've never gotten close to the calculated resolution of 10,000. This is not because of anything intrinsically wrong with the separator.
But the high resolution design
Or, comparing on the same scale:
We've never even gotten close. Why not?
We did not finish the engineering:
Why did we never carry out the good intentions?
Get the science out. Given a choice:
Can we set it up once and forget it? No. A high resolution tune is hard to maintain because it is very fussy/sensitive to everything.
So where's the rationale for a resolution 10,000 separator?