Building a Lattice in MCNP: Seeking Help

[AndrejK]

HI, i´m trying to build a lattice in mcnp. Actually it works but there are still lots of red lines in the plot.
Maybe someone can help me.
The Lattice code looks like that :

lattice
1 0 2 $ outer space
2 3 -0.00126 -2 #4 #39 #41 #42 #43 #44 #45 #46 #47 $ universe
4 2 -8.4 -1 $ ball to enable a plot
39 0 233 -115 -234 235 -236 237 #44 #45 #46 #47 fill=1
41 2 -8.4 233 -115 -89 #39 #42 #43 #44 #45 #46 #47
42 2 -8.4 233 -115 242 -243 244 -245 lat=1 u=1 fill=2
43 3 -0.00126 233 -115 238 -239 240 -241 u=2
44 2 -8.4 233 -115 244 -240 242 -243 u=2
45 2 -8.4 233 -115 241 -245 242 -243 u=2
46 2 -8.4 233 -115 240 -241 239 -243 u=2
47 2 -8.4 233 -115 242 -238 240 -241 u=2

1 so 2
2 so 1000
89 cy 2.0
115 py 900.5
233 py 899.5
234 pz 1.4
235 pz -1.4
236 px 1.4
237 px -1.4
238 px -0.1
239 px 0.1
240 pz -0.1
241 pz 0.1
242 px -0.2
243 px 0.2
244 pz -0.2
245 pz 0.2
246 py 0.5

c -- material cards --
C Material #1: water
M1 1001 0.6666
8016 0.3334
C Material #2: copper
M2 29063 0.6917
29065 0.3083
C Material #3 Air
M3 1001 0.0013
6012 0.0130
7014 0.7200
8016 0.2657

Thanks for your Help

Best regards
Andrej

 

[Achy47]

Dear Andrej,

Thank you for sharing your lattice code. From what I can see, your lattice appears to be functioning correctly. The red lines in your plot are most likely due to overlapping cells or regions that are not properly defined. I would suggest reviewing your lattice code and double checking all of your cell definitions to make sure they are correct and there are no overlapping regions.

Additionally, it may be helpful to run your code with a simpler geometry, such as a simple cube, to see if the red lines still appear. This can help narrow down the source of the issue.

If the problem persists, it may be helpful to consult with other MCNP users or reach out to the MCNP support team for further assistance.

Best of luck with your lattice building!