Performance evaluation of a crystal-enhanced collimation system for the LHC

by Valentina Previtali (CERN)

Thursday 4 Nov 2010, 14:15 → 15:15 Europe/Zurich

30/7-018 - Kjell Johnsen Auditorium (CERN)

Abstract

The Large Hadron Collider (LHC) beams, currently accelerated to 3.5 TeV, are meant to reach the nominal energy of 7 TeV, and a total stored energy, in nominal conditions, of 360 MJ per beam.  The contrast between the huge stored power and the delicate cryogenic environment calls for a sophisticated collimation system. For overcoming the limitations of the actual collimation system, different upgrade solutions have been considered; this Ph.D. work gives a first performance evaluation of a crystal-enhanced collimation system by analytical, experimental and simulation investigations.

In the presentation, two crystal collimation experiments are described: the T980 (Tevatron, Chicago, U.S.) and the UA9 (SPS, CERN, Geneva, Switzerland). The data are analyzed and actual crystal performances are measured. These experimental results and their cross-check with dedicated simulations constitute the foundations of a weighted, critical prediction for the LHC. Different scenarios for a possible LHC crystal-enhanced collimation system have been simulated. Here the results are presented and optimal parameters for a possible crystal collimator are proposed.
 

Slides ats.previtali.pdf