I need a help in explaining the output variables of the P-Track output file. There is no adequate explanation for tracing the particles in the user's guide! Please refer me to any relative information that may help me in that.
Kind regards
I've not worked on it myself so I can't give you any definitive answers but I can give you some ideas.
I'd start with a pencil beam pointing along an axis in a vacuum, that way you know exactly where the particles are going, and see what the output looks like.
Then I'd try a source distribution with one in the positive and one in the negative direction.
Once you've got them so you can understand the output gradually increase the complexity until you know what's happening.
Hope that helps.
How much time have you spent working with MCNP(X) so far?
Do you know how to position a source in an arbitrary location emitting in an arbitrary direction?
So make a source centred on 0, 0, 0 emitting in the X direction. Track the particle and see what the output says.
Do the same emitting in Y and Z, compare the outputs and you have a starting point.
When you understand the output from that do the same again but emitting in the +ve and -ve directions simultaneously.
Then just increase the complexity to the problem you're trying to solve in equally small steps.
I'm not sure what the differences are but can you not set the position and direction for a source in 4C?
I worked on Ptrac card before. What would you like to know about it. I mainly tells you where and which the reaction happened.
I have,
You will find most of it documented in the MCNP Manual Vol II beginning at 3-151. Appendix I explains the output lines but it is difficult to follow.
Here is my PTRAC card:
PTRAC FILE=ASC WRITE=all TYPE=p,e EVENT=col,bnk FILTER=150,icl
I am recording all bank and collision events of photons and electrons in volume 150.
Each line is one interaction of one particle. The first number is the reaction type.
I "unpack" the PTRAC file by using MATLAB to search for a 150 at position 6, this is the volume. Then look at the 2xxx number. Appendix I lists the last two digits of this number as event type, i.e. 17 is a knock on electron. The 2xxx indicates a bank. 1xxx is a source. 9xxx is the last event in the history, Position 15 is the energy. Position 11,12, and 13 define the location X,Y, Z of the event. etc. etc.
WARNING. These output files are HUGE! You will need a special editor. I use EM Edit.
Also consider the DBNC card instead.
2017 4 52000 0 3 150 3 1
-0.22647E+00 0.23806E+00 0.19025E+01 0.50385E+00 -0.37274E+00 0.77923E+00 0.12040E+00 0.10000E+01 0.59373E-02
Best Regards - Gregg
Hello i am using MCNPX i have this warning message in output. Can you please tell me what dose this message mean and what is the reason of this warning message. 1299 fission cell elements had no neutron tracks entering: 1299 fission cell elements had no neutron collisions 1299 fission cell elements had no fission source points