Design study for an undulator photon beam position and profile monitor

This paper we presented part of the design study for building a semi-nondestructive undulator photon beam position and profile monitor. It is a mesh wire monitor. However, in order to be classified as a semi-nondestructive monitor, the destruction to the undulator photon beam has to be minimized under the constraint of the required position resolution. The destruction considered should include the flux reduction and the beam size blowup due to diffraction (the later part are not presented in this paper). The variation parameters are the wire diameter and the wire spacing. The resolutions of the position and the profile measurements as function of the variation parameters are simulated