IUVSTA 15th International Vacuum Congress (IVC-15), AVS 48th International Symposium (AVS-48), 11th International Conference on Solid Surfaces (ICSS-11)
    Vacuum Science & Technology Thursday Sessions
       Session VST2-ThP

Paper VST2-ThP8
A White Irradiation Test facility at Elettra (WhITE)

Thursday, November 1, 2001, 5:30 pm, Room 134/135

Session: Vacuum Issues in Accelerators Poster Session
Presenter: F. Mazzolini, Sincrotrone Trieste S.C.p.A., Italy
Authors: F. Mazzolini, Sincrotrone Trieste S.C.p.A., Italy
J. Miertusova, Sincrotrone Trieste S.C.p.A., Italy
F. Pradal, Sincrotrone Trieste S.C.p.A., Italy
Correspondent: Click to Email
Photon Stimulated Desorption (PSD) provides the primary gas load in Electron Accelerators and Storage Rings. Dedicated experimental setups have been installed in various Synchrotron Radiation Facilities in order to understand the vacuum behavior of different materials with respect to non monochromatized Synchrotron Light irradiation. This has been performed by measuring the variation of the desorption yield due to the accumulated dose. The need to investigate the feasibility of a White Irradiation Test setup at Elettra (WhITE), the Italian Synchrotron Radiation Facility, has been suggested by several reasons: the evaluation of vacuum performance of new materials to be used at Elettra, such as the Non Evaporable Getter coatings; the preconditioning of new vacuum components before their final installation; the evaluation of the efficiency of different cleaning pretreatments on vacuum components; the assessment of any interaction between the photon flux and the vacuum instrumentation. The use of an already installed "standard" Bending Magnet Front-End (BMFE) has been verified. It involves a remarkable saving in time and money and the BMFE can be easily recovered to standard operations (hosting a regular beamline), by just removing the irradiation arrangement. The installation of WhITE on a currently unused BMFE Left Branch Light Port has been considered. Only a minor modification on the Front-End itself is required: the insertion of a collimator in order to avoid low energy photons striking the conductance aperture. It can also be used to reduce the divergence of the photon beam hitting the sample. In this article we present the layout, current status and first results of WhITE.