Performs local correction of the Resonance Driving Terms (RDTs) in the Insertion Regions (IRs) based on the principle described in [1] with the addition of correcting feed-down and using feed-down to correct lower order RDTs. Details can be found in [2].

• The note containing background, derivation and implementation details can be found in the attached note.
• Autogenerated docs via Sphinx can be found at https://pylhc.github.io/irnl_rdt_correction/.

This package is Python 3.7+ compatible, and can be installed through pip:

python -m pip install irnl-rdt-correction

After installing, scripts can be run with either python -m irnl_rdt_correction --FLAG ARGUMENT or by calling the Python files directly.

For development purposes, we recommend creating a new virtual environment and installing from VCS in editable mode with all extra dependencies:

git clone https://github.com/pylhc/irnl_rdt_correction
python -m pip install --editable "irnl_rdt_correction[all]"

• irnl_rdt_correction.py - Script to compute RDT correction in the (HL)LHC IRs including feed-down effects.

This project is licensed under the MIT License - see the LICENSE file for details.

[1] : O. Bruening et al., Dynamic aperture studies for the LHC separation dipoles. (2004) https://cds.cern.ch/record/742967

[2] : J. Dilly and R. Tomás, A flexible nonlinear Resonance Driving Term based Correction Algorithm with feed-down. (2022) note.pdf