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ECP-WarpX / WarpX

WarpX is an advanced electromagnetic & electrostatic Particle-In-Cell code.
https://ecp-warpx.github.io
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DD fusion reactions do not occur #4359

Closed rupenether closed 1 year ago

rupenether commented 1 year ago

Hi,

I am simulating a laser driven colliding DD plasma, with deuterium energies in O(~) MeV ranges. I do not observe any fusion reaction D + D -> 3He + n, however particle output clearly shows that they are colliding. Am I missing something in the simulation?

Best, Roopendra

RemiLehe commented 1 year ago

Thanks for the question.

Would you be able to compare your simulation script with these examples: https://github.com/ECP-WarpX/WarpX/blob/development/Examples/Tests/nuclear_fusion/inputs_deuterium_deuterium_3d https://github.com/ECP-WarpX/WarpX/blob/development/Examples/Tests/nuclear_fusion/inputs_deuterium_deuterium_3d_intraspecies These examples are part of our automated test suite, and so they should produce fusion reactions.

If comparing with the above input scripts does not help, feel free to post your input script here ; we could take a closer look.

rupenether commented 1 year ago

Hi Reme,

I did tally my input script with example test suite and everything looks fine to me. I have already run example test suites, and they produce fusion reactions. But in my case they do not. I have attached input file.

inputs_3d2.txt

Best, Roopendra

PhysicsDan commented 1 year ago

Hi Roopendra, It might be from this typo in your input: c.DD.fusion_multiplier=1.e50 should be c_DD.fusion_multiplier=1.e50

rupenether commented 1 year ago

Hi Roopendra, It might be from this typo in your input: c.DD.fusion_multiplier=1.e50 should be c_DD.fusion_multiplier=1.e50

Thanks Daniel! typo was the problem.

rupenether commented 1 year ago

The problem has been solved, I will close the thread.