def METHOD_NAME(self, name, size):
    """
    Method called when the aperture diameter changes
    Args:
        name (str): diameter name - not used.
        size (float): diameter size in microns
    """
    self._beam_size_dict["aperture"] = [size, size]
    self._beam_info_dict["label"] = int(size * 1000)
    self.evaluate_beam_info()
    self.re_emit_values()