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Sensolini, G.

Paper Title Page
TUPP051 Coupling Impedance of DAΦNE Upgraded Vacuum Chamber 1661
 
  • F. Marcellini, D. Alesini, P. Raimondi, G. Sensolini, B. Spataro, A. Stella, S. Tomassini, M. Zobov
    INFN/LNF, Frascati (Roma)
  
  The DAΦNE Phi-factory at INFN LNF has been ugraded in the second half of 2007 with a scope to test a recently proposed scheme of crab waist collisions. The vacuum chamber of the collider has been substantially modified: two new low impedance interaction regions have been designed and installed, the new stripline injection kickers have been implemented, the old bellows have been substituted by the new ones and all ion clearing electrodes have been removed. In the paper we present the machine impedance study of these new vacuum chamber components and compare bunch lengthening measurements in the modified DAΦNE with simulation results.  
TUPP074 A New RF Shielded Bellows for the DAΦNE Upgrade 1706
 
  • S. Tomassini, F. Marcellini, P. Raimondi, G. Sensolini
    INFN/LNF, Frascati (Roma)
  
  A new RF shielded bellows, using the technology of omega shaped strip of beryllium copper material, has been developed and tested on the DAΦNE Upgrade*. The RF omega shield is composed by many Be-Cu strips held by an external floating ring**. Thermal power loss on strips can be easily extracted and dissipated allowing high beam current operation. Leakage of beam induced e.m. fields through the RF shield is almost suppressed. Twenty omega bellows were manufactured and installed in the DAΦNE storage rings and showed good properties up to a stored beam current of 700 mA.

*DAΦNE upgrade: A New magnetic and mechanical layout. PAC07. pp. 1466-1468, Albuquerque.
**Design and E. M. Analysis of the New DAΦNE Interaction Region. PAC07, Albuquerque, pp 3988.

 
TUPC065 Luminosity Measurement at DAΦNE for Crab Waist Scheme 1203
 
  • M. Boscolo, F. Bossi, B. Buonomo, G. Mazzitelli, F. Murtas, P. Raimondi, G. Sensolini
    INFN/LNF, Frascati (Roma)
  • N. Arnaud, D. Breton, A. Stocchi, V. Variola, B. F. Viaud
    LAL, Orsay
  • P. Branchini
    roma3, Rome
  • F. Iacoangeli, P. Valente
    INFN-Roma, Roma
  • M. Schioppa
    INFN Gruppo di Cosenza, Arcavacata di Rende (Cosenza)
  
  Since the beginning of 2008 the DAΦNE complex started to test the "crabbed scheme" to improve the luminosity performance of the accelerator. In order to ensure a fast, accurate and absolute measurement of the luminosity and to fully understand the background conditions, the new interaction region has been equipped with three different luminosity monitors: a Bhabha calorimeter, a Bhabha GEM tracker and a gamma bremsstrahlung proportional counter. The detectors design, construction, and performance, as well as the first measurements performed at DAΦNE during the crab waist commissioning are here presented. Data are also compared with the Monte Carlo simulations of the full setup. First results acquired during the SIDDHARTA run are supposed to be presented.