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GPT Versions: GPT version 2.8 runs under both Microsoft-Windows and Linux. Both versions contain the same tracking engine, use identical in- and outputfiles, and ship with all pre- and postprocessing tools. However, the Linux release does not contain the graphical 'GPTwin' user interface, and is therefore not able to produce graphical output. GPT version 3.0 is essentially identical to version 2.8, but also includes a 'Barnes&Hut' treecode to efficiently calculate all pair wise Coulomb interactions for modeling spacecharge, granularity and stochastic effects from first principles.

GPT Version 2.7 2.83 3.02
Platform(s) Windows Windows
Linux		 Windows
Linux
GPT core technology            
3D relativistic equations of motion solver      
3D positioning of beamline components      
Spacecharge            
  Multigrid Particle-In-Cell O(N) 1) 1) 1)
  Point-to-point O(N2) model      
  Granularity/stochastic effects O(N log N)     1)
Custom beam-line components      
1D/2D/3D field-maps      
Hierarchical data analysis      
FEL and Collector design      
Scanning and solving      
Interfacing with external codes      
'GPTwin' Graphical User Interface 2)  

Windows only
Multi-core tracking      
MPI multidimensional parameter scans 3)      
32/64bit Operating systems            
32-bit executables      
64-bit executables      
Pricing            
Commercial use    

€ 4,000

€ 8,000
Non-profit organizations    

€ 2,800

€ 4,000
Additional license discount    

50%

50%

1) Single CPU only.
2) The output of GPT can be converted to the SDDS and ASCII formats, for which excellent plotting packages are available for Linux. There are no plans to port the MS-Windows graphical interface to Linux. On-line help is provided in the form of PDF files of the User Manual.
3) Parameter scans can be distributed automatically over several PC's and/or over multi-core machines using the MPIMR program. This program is included in both the Windows and the Linux version of GPT, but requires MPI to be installed.
 
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