Skip to content

tianhongg/WAND-PIC

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

51 Commits
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

WAND-PIC

logo

(This is the alpha release of WAND-PIC, some parts are not completely developed and still under testing. Please report an issue if you see errors, and any resulting instability. Thanks!)

Wakefield AcceleratioN and Direct-laser acceleration -- Particle in Cell Simulation.

WAND-PIC is a 3D parallel quasi-static particle-in-cell simulation code. Developed by Tianhong Wang in 2019, at Dr. Gennady Shvets' Group, Cornell University.

You are welcome to clone or download this repository. 😄 Please also send an email to the author Tianhong Wang(tw474@cornell.edu). We'd like to keep track of user numbers and affiliations. plot

Features

  • 2D partitioning of the transverse domain.
  • Adaptive longitudinal mesh refinement according to the speed of plasma trajectories.
  • Advanced quasi-static equations, there is no need of "predictor-corrector" scheme.
  • In-house parallel Multigrid Solver. One for all equations.
  • Sub-cycling of macro beam particles, captures sophisticated wave-particle resonant interaction.
  • Parallel output and reload.

Structure

logo

Prerequisites

  • A MPI Library
impi or mpich
  • A Parallel NetCDF Library
pnetcdf
  • A Good Weather. 🌞

  • A Working Computer 💻 and Electricity. ⚡

Compiling

A simple & working Makefile is included Makefile. The 'make' should work on most machines, and your are welcome to write your own one.

Tested Environment

WAND-PIC has been tested on four different server/supercomputers, from few cores to over 4000 cores, including:

  • TACC STAMPEDE2: SKX Nodes [Intel Xeon Platinum 8160 ("Skylake")]
intel/18.0.2; impi/18.0.2; pnetcdf/1.11.0
  • TACC STAMPEDE2: KNL Nodes [Intel Xeon Phi 7250 ("Knights Landing")]
intel/18.0.2; impi/18.0.2; pnetcdf/1.11.0
  • TACC LONESTAR5: Nodes [Intel Xeon E5-2690 v3 ("Haswell")]
intel/18.0.2; cray_mpich/7.7.3; pnetcdf/1.8.0
  • Small Server: Nodes [Intel Xeon(R) E7-4830 v4]
intel/18.0.2; impi/18.0.2; pnetcdf/1.11.0

(** when running with pnetcdf older than 1.10.0??, parallel output may not work properly. This happens on Lonestar5 occasionally for unknown reasons.)

Benchmarking

logo

Running

Example: running on a server with 36 cores

mpiexec -n 36 ./WAND

Simulation Example

Intense Laser Pulse Propagates in the Tenuous Plasma logo

Long Electron Beam Propagates in the Tenuous Plasma (Hosing Instability) logo

Developing

I started to work on this project in early 2019 and I am currently the only author of this project:scream_cat:. Due to the lack of workforce and limited energy & time, I may improve and update the code slowly in the future:snail::snail::snail::snail:. Hidden bugs are waiting to be found, and many functions/modules need to be added. This version of WAND-PIC is the first version I finished recently (around July-2019) and it’s already been used in several research. During the development of WAND-PIC, I am trying to keep as less dependency as possible and the pnetcdf is the only lib I use. Some part of the code are still under developing, for example, the Multigrid class, it needs further testing and improving. Suggestions and feedback are welcome.

Task Lists

  • Periodic Boundary Condition (finished, need test and upload)..
  • A Reduced, Simplified Radiation Module (Classical)..
  • Pipeline in Longitudinal Direction and Load Balance..
  • More and Better MG Solver Smoother..
  • High-order Pondermotive Potential..
  • OpenMP..

Author

License

This project is licensed under the MIT License - see the LICENSE.md file for details.

Acknowledgments

  • The author of WAND-PIC would like to thank all members in Dr. Gennady Shvets' Plasma Group at Cornell University.
  • Thank Dr. Vladimir N. Khudik for his help in deriving related equations.
  • Thank Dr. Roopendra Singh Rajawat for inventing the name "WAND-PIC".

Reference

About some of the algorithms

About DLA_1; DLA_2

About our group

||----------------------------------------------------------------------------------||
||----------------------------------------------------------------------------------||
||                                                                                  ||
||               __        ___    _   _ ____        ____ ___ ____                   ||
||               \ \      / / \  | \ | |  _ \      |  _ \_ _/ ___|                  ||
||                \ \ /\ / / _ \ |  \| | | | |_____| |_) | | |                      ||
||                 \ V  V / ___ \| |\  | |_| |_____|  __/| | |___                   ||
||                  \_/\_/_/   \_\_| \_|____/      |_|  |___\____|                  ||
||                                                                                  ||
||----------------------------------------------------------------------------------||
||--  (W)akefield (A)cceleration a(n)d (D)LA - (P)article (i)n (C)ell Simulation  --||
||----------------------------------------------------------------------------------||
||---Author-----------           : Tianhong Wang                --------------------||
||---Starting---------           : Jan-11-2019                  --------------------||
||---Email------------           : tw474@cornell.edu            --------------------||
||---Group------------           : Dr. Gennady Shvets' Group    --------------------||
||---Copyright--------           : (C) 2019 by Tianhong Wang    --------------------||
||----------------------------------------------------------------------------------||
||----------------------------------------------------------------------------------||