This directory contains some of Greg Hammett's notes on the GS2 gyrokinetic code.

There is also an ftp interface to this same material at On a unix box, this allows you to recursively get all the files in my GS2 directory by typing the command:

wget -r --cut-dirs=3 -nH

GS2 Home page which links to various sources of information, including:

The Main GS2 Wiki Pages

Browse the current SVN repository for the GS2 source files

Older info: This is Dorland's orignal GS2 web site , which was the main source of information on the code, but now the web sites above should be used. (See also the copyright and usage information.)

Jessica Baumgaertel's work on GS2 for Stellarators:

"Simulating the Effects of Stellarator Geometry on Gyrokinetic Drift-Wave Turbulence", J. A. Baumgaertel, Princeton Ph.D. Dissertation, 2012.

The GS2 svn repository version #1512 contains the version that Jess checked in and used for the work in her thesis. This contains the improvements she made to GS2's treatment of trapped particles (buried in the implicit solver) to be more robust for stellarator geometries.

On the PPPL linux cluster, this is in /p/gs2/jbaumgae/gs2/src_newest_1512. I think src_1872 is a more recent version that she tried comparing with.

Warning: Starting with GS2 svn version #1626 (or perhaps before?), it appears that the option to normalize to v_t=sqrt(T/m) has been removed from GS2, so all results are normalized to v_t2=sqrt(2*T/m).

/p/gs2/jbaumgae/gs2/TestFiles/ contains various tests, including for the Cyclone base case.

/p/gs2/jbaumgae/FIGG contains source files and documentation for the FIGG "Flexible Improved Grid Generator", which provides a replacement to rungridgen (which was quite buggy for stellarator cases). FIGG uses P. Xanthopoulous' GIST code to read geometry information from VMEC / Terpsichore / VVBAL.