def irradiation_geometry(name):
    p = os.path.join(paths.meta_root, 'irradiation_holders', add_extension(name))
    return IrradiationGeometry(p)
def irradiation_geometry(name):
    p = os.path.join(paths.meta_root, 'irradiation_holders', add_extension(name))
    return IrradiationGeometry(p)