Presentation Information
[2P39]Systematic Studies on Photon Stimulated Desorption from High Temperature Superconductor and Amorphous Carbon Thin Films at Cryogenic Temperature
*Yasunori Tanimoto1, Xiuguang Jin1, Takashi Nogami1, Sergio Calatroni2, Roberto Kersevan2, Marton Ady2, Montse Pont3, Oriol Traver3, Teresa Puig4, Joffre Gutierrez4, Guilherme Telles4, Neil Lamas4, Luca Benedetti4 (1. High Energy Accelerator Research Organization (KEK), 2. European Organization for Nuclear Research (CERN), 3. ALBA Synchrotron Light Source, 4. Institut de Ciencia de Materials de Barcelona (ICMAB))
The PSD measurements for a-C and HTS coatings have been systematically carried out at the PF BL-21, where similar energy of SR to FCC-hh and a dedicated LN2 cool- ing system are available. The experimental results conclude that the LN2 cooling reduces the PSD yields by factors of 20~50, down to the order of 10-5 molecules/photon after the photon dose over 1022 photons/m. Although a precise vacuum system consideration, such as Synrad-Molflow combined simulation, will be necessary, the PSD data obtained here indicates that the HTS and a-C coated HTS surfaces, aiming at reduction of impedance and electron clouds, are very promising for application to the FCC-hh BS also in term of the PSD outgassing.