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bmad-sim / bmad-ecosystem

Bmad simulation ecosystem for simulating high energy storage rings.
https://www.classe.cornell.edu/bmad/
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dynamic aperture program taking too long with ramping #428

Open jeu8 opened 1 year ago

jeu8 commented 1 year ago

the dynamic aperture program with ramping is taking longer than it should. It was talking several hours for a single pz value. I can track 10000 particles through the long term tracking program significantly faster. It is possible this is not a bug, but could be that whatever scheme in the DA program does not work efficiently with ramping

files at /nfs/acc/temp/jeu8/test

DavidSagan commented 1 year ago

@jeu8 Looks like ramping and radiation both on are causing slowness. Try turning off radiation (you should not need it for 500 turns) and report back.

jeu8 commented 1 year ago

It is much quicker without radiation. This should work for now. I am later planning to calculate the DA for a 8500 turn ramp where radiation will be important.

DavidSagan commented 1 year ago

I will look at speeding things up. The problem now is that changing the ref energy causes an extensive coefficient recalc.