[FLASH-USERS] Radiation-driven ablation problem by x-ray from laser-heated foil

[유현규]

Dear FLASH users,

I’m trying to simulate the radiation-driven ablation problem like RadSlab, using x-ray generated from laser-heated foil.

I adjusted the initblock file of LaserSlab since I couldn't find any major differences between RadSlab and LaserSlab, except for the special boundary condition and some EOS settings in par file.

In the adjusted initblock, I placed a high-density gas target (~few mg/cc) beneath the thin foil (~1 micron), with the laser coming from the upper side. The peak intensity of the laser is 10^14 W/cm^2.

But it seems that the high-density gas target isn’t heated by the X-rays generated from back side of the thin foil. Instead, it is just pushed out by the laser-driven shock.

Before working on this, I had checked that the radiation in the frequency range around 300 eV to 500 eV is more intense on the back side of the foil than the front by checking r015 in checkpoint file. However, I'm not sure if checking the r015 file was the correct way to examine the intensity of the radiation.

Is there something wrong with my simulation? Also, what exactly does r0XX mean, and what is its unit?





Best Regards,

Hyungyu Yu
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