/**
* Scale the field by beta-gamma to preserve the magnet's influence on the beam.
*
* @param kineticEnergy
* @param designKineticEnergy
* @param restEnergy
*/
public void preserveDesignInfluence(
final double kineticEnergy, final double designKineticEnergy, final double restEnergy) {
final double energy = kineticEnergy + restEnergy;
final double designEnergy = designKineticEnergy + restEnergy;
final double betaGamma = Math.sqrt(Math.pow(energy / restEnergy, 2) - 1.0);
final double designBetaGamma = Math.sqrt(Math.pow(designEnergy / restEnergy, 2) - 1.0);
final LiveParameter fieldParameter = getLiveParameter(FIELD_INDEX);
final double designField = fieldParameter.getDesignValue();
fieldParameter.setCustomValue(designField * betaGamma / designBetaGamma);
}
