Custom source error

User Support
1

Dear all，
I recently encountered a problem when using a custom source. I want to define a spherical shell source with a radius of 400-730cm. The code is as follows:

source
source701×596 26.2 KB

However, when I run it, it prompts an error:
error
The model file I run is as follows, the location of the source is included in the geometry(the green area), the upper and lower surfaces are reflective surfaces:
model
geometry.xml (5.1 KB)
materials.xml (23.2 KB)
settings.xml (233 Bytes)
How should I resolve this error?
Thanks in advance for your help!

2

In addition, in order to find out the problem, I ran two groups of simulations. The first group used the point source (600,0,0).
setting
The second group defined the same location in source.cpp.

new
new819×555 119 KB

However, the first group could run successfully, while the second group reported the same error.
correct
correct724×407 239 KB

second
second696×113 67.1 KB

3

In C++, the body of a class is private by default. You need to explicitly have public: before defining the sample method, i.e.:

class PlasmaSource : public openmc::Source {
public:
    openmc::Particle::Bank sample(uint64_t* seed) const {
       ...
    }
};

Also, just a forewarning – in the latest version of OpenMC (0.12.2), the interface for custom sources changed slightly. If you upgrade to 0.12.2, you’ll need to change openmc::Particle::Bank to openmc::SourceSite.

4

Hello paul,
I just tried your method, but after adding public:, it’s still the same error.

5

Ah yes, on second thought public: is actually not needed. Upon looking at your XML files, I see there is simply a typo in settings.xml:

<source libraray="./libsource.so" strength="1.0" />

In this line “libraray” should be “library”. Once you fix that, hopefully it should work (provided you have a compiled source libsource.so in that directory).

6

Thank you very much, paul. My carelessness caused a spelling error and caused a series of problems. Now the problem has been solved.