/**
* 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);
}
/**
* Export optics changes using the exporter.
*
* @param exporter the optics exporter to use for exporting this node's optics changes
*/
public void exportOpticsChanges(final OpticsExporter exporter) {
final LiveParameter parameter = getLiveParameter(FIELD_INDEX);
if (parameter.getDesignValue() != parameter.getInitialValue()) {
final DataAdaptor adaptor =
exporter.getChildAdaptor(getNode().getParent(), getNode().dataLabel());
adaptor.setValue("id", getNode().getId());
final DataAdaptor attributesAdaptor = adaptor.createChild("attributes");
final DataAdaptor magnetAdaptor = attributesAdaptor.createChild("magnet");
magnetAdaptor.setValue("dfltMagFld", parameter.getInitialValue());
}
}