ECHO4D

How to Run ECHO3D on macOS When you download the ECHO3D code on a macOS computer, the files may have an extended attribute called com.apple.quarantine. You must remove this attribute before launching the applications. Removing the Extended Attribute: Open Terminal. Navigate to the Codes/MacOS_ARM directory. Run the following command: xattr -c ./* Step-by-Step Instructions for Running ECHO3D: Open Terminal. Navigate to the Example Directory: cd (your path)/ECHO3D_v1_4/Examples/N1_RoundStepOut_LongWake Copy All Codes from the “Codes” Directory: cp ../../Codes/MacOS_ARM/* ./ Run Mesher: ./Mesher…

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Version 3.2: a bug of mesh creation in ECHOz1 and ECHOz2 is fixed; small changes in GUIs; the manual is updated. The example with inconsistent results was found by Jean-Yves Raguin (PSI). It was a bug in the mesh creation. Following my debugging expierence with this example I have placed the following text in the manual. “The codes use a conformal finite-difference method. In the time-domain wake field calculations the mesh resolution with 5 mesh points on the rms bunch…

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As default mesh use 5 mesh lines on sigma in vacuum and “NStepsInConductive=10” in metal. It means that the skin depth in the metal will be meshed with 10 mesh lines. If you increase the mesh density in vacuum by factor 2 (10 mesh lines on sigma) you should simultaneously increase by the same factor “NStepsInConductive” in metal: “NStepsInConductive=20”. It means that the calculation depth in the metal remains the same. For 20 mesh lines on sigma use ”NStepsInConductive=40” and so on. …

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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…

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