Question about some quantities in LASY

[Gholipoorr]

Hello
1)Are there any relationships between lo and hi in LASY with simulation box (r and z) in FBPIC?
2)What is the meaning of laser.propagate(-1e-3) and how we should initialize its amount?

[MaxThevenet]

Dear @Gholipoorr,
Thank you for your questions.

1. I think the lo and hi in LASY are independent from the bounds in FBPIC (although in some cases it could make sense to set them to the same value), @hightower8083 can correct me if I'm wrong.
2. after initialising a laser pulse at some location, you can propagate it by some distance. This is what this function call does, and the argument is the propagation distance in SI. In this case, the laser pulse is propagated 1 mm, backwards (because of the -).

Does this answer your questions?

[Gholipoorr]

Thanks for your reply
What are the rules to determine lo and hi?
When we should set laser.propagate(1e-3) and when negative?