PyECLOUD Version 8.2.0 (Python 2)

New features:

• Cross-ionization: ionisation of residual gas by the existing ions and electrons in the chamber (thanks Lotta!).
  • More information can be found here
• Computation and logging of stored electric energy.
• Forces on electrons can be optionally calculated using electromagnetic potentials instead of quasi-static approximation (thanks Lorenzo!).
  • More information can be found here.
  • Cython implementation of Boris tracker can now handle longitudinal magnetic field.
• Simple parallelization for buildup simulation (only single-grid supported for now)
  • An example can be found in /testing/parallel_buildup.
• Improvements in photoemission module:
  • Source of photoemission on the chamber in the horizontal plane can be specified by setting x0_refl = 'left' or x0_refl = 'right'.
  • Check that specified outer circle is fully outside the chamber.

This version of PyECLOUD is compatible with Python 3.

• Python 3 code can be generated using the script generate_python3 in the main folder.
  • The script should be called after setup_pyecloud is executed (the .so objects must be in place)
• Similar scripts are available also in PyPIC, PyHEADTAIL and PyPARIS.
• PyKLU and NAFFlib are natively compatible with Python 3.

PyECLOUD Version 8.1.0

New features:

• Elastics can be handled like in POSINST, within Furman-Pivi secondary emission (thanks Eric!)
• Energy spectrum can be saved segment by segment
• Soft regeneration can be done asynchronously (thanks Lotta!)
• Possibility to save only a subset of the output variables

Cleanup and fixes:

• Refactored perfect absorber (removed dedicated impact_manager)
• Restored python 3 compatibility for Furman-Pivi module
• Kinetic energy spectrum handled correctly in checkpointing

This version of PyECLOUD is compatible with Python 3.

• Python 3 code can be generated using the script generate_python3 in the main folder.
  • The script should be called after setup_pyecloud is executed (the .so objects must be in place)
• Similar scripts are available also in PyPIC, PyHEADTAIL and PyPARIS.
• PyKLU and NAFFlib are natively compatible with Python 3.

PyECLOUD Version 8.0.1

Fix:

• Small fix in example script to reload state

PyECLOUD Version 8.0.0

New features:

• For surface modelling and characterization (thanks to Eric!):
  • Furman Pivi surface modeling
  • Possibility of extracting energy spectra for emitted electron components
  • Modelling imposing that emittend macroparticles do not have more energy than the corresponding impacting ones (switch_no_increase_energy=2)
  • Normal emission of secondary electrons.
• Diagnostics on electrons in the chamber (thanks to Lorenzo!):
  • Electron lifetime histogram
  • Energy spectrum of electrons in the chamber

This version of PyECLOUD is compatible with Python 3.

• Python 3 code can be generated using the script generate_python3 in the main folder.
• Similar scripts are available also in PyPIC, PyHEADTAIL and PyPARIS.
• PyKLU and NAFFlib are natively compatible with Python 3.

PyECLOUD Version 7.7.1

Added a small new feature:

• Possibility to disable logfile and progressfile by setting them to None (needed for multibunch parallel simulations).

PyECLOUD Version 7.7.0

New features:

• Effect of surface charging on secondary emission (for insulators)
• Possibility of saving custom observables defined by user-provided functions
• Possibility of saving the beam field in PyEC4PyHT (requires PyPIC 2.4.0)
• flag_hist_impact_seg is now ON by default

Python 3 compatibility:

• Introduced auto-generation of python 3 code
• Several fixes for python 3 compatibility of the auto-generated code
• NAFFlib is now used for frequency analysis in all examples (removed dependence on obsolete PySUSSIX)

PyECLOUD Version 7.6.1

Updates:

• More general extract_sey method
• Possibility to disable extract_sey from input
• Updated checkpointing behavior
• Added example script for pinch inspection

PyECLOUD Version 7.6.0

New feature:

• Checkpointing deployed for buildup simulations (thanks to Eric!).

Core restructuring:

• Reorganised impact_manager: all Secondary Emission physics now in a separate module, in preparation for Furman Pivi implementation.
• mystyle adapted for matplotlib2.
• Cleaned up using autopep8.

Fixes:

• Corrected a bug in the export and load of the macroparticles (vy was set equal to vz). It affects PyEC4PyHT.
• Corrected stdout info with one plane disabled in PyEC4PyHT.
• Test for fastion mode was incompatible with recent versions of numpy. Fixed.

PyECLOUD Version 7.5.0

New features:

• PyEC4PyHT can handle a multi-bunch beam.
• A full build-up simulation can be performed using a sliced PyHEADTAIL beam (a test has been added).
• The code can handle extra-info dictionary attached to the slice objects by PyPARIS 2.0 (to be released).
• e-cloud objects can be reset for simulating multiple turns. Buildup output is handled correctly in this mode.
• The kick from PyEC4PyHT to the beam can be disabled separately for the two planes.

Fixes:

• Saving of electron MP positions in PyEC4PyHT was broken since a few versions. Fixed here.

PyECLOUD Version 7.4.0

New feature:

• pyeclsaver can be used within PyEC4PyHT to save cloud evolution

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Fixes:

• Empty slices are treated correctly in PyEC4PyHT
• Casting indices to int when slicing array (compatibility with recent numpy versions)