A Complete Example for multipacting field level scan
1. Information related particles with resonant trajectories are in the file ./job/OUTPUT/resonantparticles, the format of resonantparticles shows below: Field Level ID X Y Z Energy Phase RF Impact_num 16000000 4310 -0.00079 0.100003 -0.00017 10.58931 1.48E-08 19.41 39 16000000 4310 -0.00079 0.100003 0.000168 10.50246 1.52E-08 19.91 40 16000000 4440 -0.00079 0.100003 -0.00017 10.58718 1.48E-08 19.41 39 16000000 4440 -0.00079 0.100003 0.000168 10.50515 1.52E-08 19.91 40 ... 17000000 4500 -0.00078 0.100008 -0.00017 15.45694 1.48E-08 19.39 39 17000000 4500 -0.00078 0.100008 0.000175 15.46824 1.51E-08 19.89 40 17000000 4630 -0.00078 0.100008 -0.00017 15.43081 1.48E-08 19.39 39 17000000 4630 -0.00078 0.100008 0.000175 15.38785 1.51E-08 19.89 40 17000000 4760 -0.00078 0.100008 -0.00017 15.36465 1.48E-08 19.39 39 17000000 4760 -0.00078 0.100008 0.000175 15.45242 1.51E-08 19.89 40 ... 18000000 10901 -0.00078 0.100005 -0.00017 20.42707 1.47E-08 19.37 38 18000000 10901 -0.00078 0.100006 0.000178 20.46064 1.51E-08 19.87 39 18000000 11021 -0.00078 0.100005 -0.00018 20.49802 1.47E-08 19.37 38 18000000 11021 -0.00078 0.100006 0.000178 20.46099 1.51E-08 19.87 39 18000000 11141 -0.00078 0.100006 -0.00018 20.42072 1.47E-08 19.37 38 18000000 11141 -0.00078 0.100005 0.000177 20.4386 1.51E-08 19.87 39 19000000 3460 -0.00078 0.100016 -0.00017 24.09866 1.47E-08 19.36 39 ...
Some Explanations
The following lines show the number of elements and number of DOFs in the computation:
The following lines show the memory usage:
Maximal per-core estimated memory 451 MB Aggregated estimated memory 875 MB Maximal per-core estimated memory if OOC 184 MB Aggregated estimated memory if OOC 365 MB
If the Maximal per-core memory is larger than what is available, user should either increase the number of cores in the computation or use other options such as Out-of-core (OOC) solver. Note that it may not be good to use excessively large number of cores in the computation (in fact, it may hurt performance or it may fail to get results if doing so). It is often a good idea to have a few thousand elements per core in the parallel computations.
The following lines show the resulting eigen frequencies.
Number of converged eigenpairs = 2 eigenvalue: 2.726061596672462e+03 Frequency: 2.491200411267457e+09 Residual: 2.54e-11 eigenvalue: 3.545447315320415e+03 Frequency: 2.841033486606133e+09 Residual: 1.25e-09
Note that the residual of the eigenpair should be reasonably small to be a good solution.