Programme stuck in superposed field maps

[Didier]

Dear Shliu,

You're still pushing the code to its limits!
So send me that last distribution and I'll take a look.

Regards,

Didier

[shliu]

Dear Didier,

I edit it in the last reply. I still attach it here.

dst_input_2.dst

(22.33 MiB) Downloaded 7 times

Kinds,
shliu

[Didier]

Dear Shliu,

Ok, new improvements to the code that covers your last dst file and that should avoid future problems of this type, I hope.

Regards,

Didier

[shliu]

Finally, it works well now. Thank you very much!

I notice that it runs much slower in the first 0.1/0.25/0.5 meters comparing with downstream running, so are there any special considerations on that?
BTW, what's the boundary of the input distribution for divergence and dp/p?

Kinds,
shliu

[Didier]

Dear Shliu,

The closer your beam dispersion is to -50%, the longer it will take to get from one position to another, because in this specific transport mode (SUPERPOSE_MAP_OUT, field map curving trajectory), transport progresses in time and not in z. So when some particles have very low energy, it takes a long time to move from one position to the next. In addition, you lose more and more particles, especialy them being energy very low, which also speeds up transport.
So the limit is normally dp/p=-50%, i.e. E~=0 MeV.

Regards,

Didier

[shliu]

Dear Didier,

Thank you for the detailed explanation.

Kinds,
shliu