Commisso, M.

Paper	Title	Page
MIT03	Experimental Efforts at LNF to Reduce Secondary Electron Yield in Particle Accelerators	46
	R. Cimino, M. Commisso, T. Demma, D. Grosso INFN/LNF N. Mahne, A. Giglia CNR-IOM
	A common effort in most of the accelerator centers is to develop new technologies to produce and test beam pipe inner walls of particle accelerators with an as low as possible Secondary Electron Yield (SEY). This item, in fact, is crucial in controlling Electron Cloud formation and in reducing its effects, that are well known to be a potential bottle-neck to the performances obtainable from present and future accelerators. Frascati has a longstanding experience in qualifying materials in terms of surface parameters of interest to e-cloud issues. We are routinely measuring SEY, its dependence from electron energy, temperature and scrubbing and we are about to be ready to study not only Photo Electron Yield (PEY) by using synchrotron radiation beamlines in construction at DAΦNE, but more importantly, to characterize in situ the surface chemical composition and eventual modifications occurring during electron or photon irradiation. Such characterization effort is also suggesting ways to produce Low SEY materials. Some preliminary results will be here discussed.
	Slides
DIA04	Status of COLDDIAG: a Cold Vacuum Chamber for Diagnostics	190
	S. Gerstl, T. Baumbach, S. Casalbuoni, A. Grau, M. Hagelstein, D. Saez de Jauregui Karlsruhe Institute of Technology R. Cimino, M. Commisso, B. Spataro, A. Mostacci INFN/LNF J. Clarke, D. Scott Science and Technology Facilities Council (STFC/DL/ASTeC) Daresbury Laboratory Accelerator Science and Technology Centre M. Cox, J. Schouten Diamond Light Source Ltd (Diamond) R. Jones, I. Shinton Cockcroft Institute E. Wallen Lund University - MAX-Lab R. Weigel Max-Planck Institute for Metal Research, Stuttgart V. Baglin CERN C. Boffo, G. Sikler Babcock Noell GmbH (BNG) T. Bradshaw Science and Technology Facilities Council (STFC/RAL) Rutherford Appleton Laboratory
	One of the still open issues for the development of superconducting insertion devices is the understanding of the heat load induced by the beam passage. With the aim of measuring the beam heat load to a cold bore and in order to gain a deeper understanding in the beam heat load mechanisms, a cold vacuum chamber for diagnostics is under construction. We plan to have access with the same set-up to a number of different diagnostics, so we are implementing: i) retarding field analyzers to measure the electron flux, ii) temperature sensors to measure the total heat load, iii) pressure gauges, iv) and mass spectrometers to measure the gas content. The inner vacuum chamber will be removable in order to test different geometries and materials. COLDDIAG is built to fit in a short straight section at ANKA, but we are proposing its installation in different synchrotron light sources with different energies and beam characteristics. A first installation in DIAMOND is planned in June 2011. Here we describe the technical design report of this device and the planned measurements with beam.
	Slides