The package ECHO2D is updated to version 3.1.

New features:

1. ECHOz1 and ECHOz2 are thread parallelized.

2. ECHO2D allows to use many materials with different permittivities, permeabilities and conductivities.

3. ECHO2D allows different shape of bunch.

4. Field monitors in ECHOz2 and ECHO2D.

5. Wake monitor in ECHO2D.

Manual is updated as well. In the next update I will describe how to do particle tracking and waveguide port setup.

The executables are for Windows. the code ECHO2D can be compiled as console version for Linux/MacOS on demand.