Speaker
Dr
Walter Scandale
(INFN - Roma 1 / CERN)
Description
The UA9 experimental equipment was installed in the CERN-SPS in March ’09 with
the aim of investigating crystal assisted collimation in coasting mode. Its basic layout comprises silicon bent crystals acting as primary collimators mounted inside two vacuum vessels. A movable 60 cm long block of tungsten located downstream at about 90 degrees phase advance intercepts the deflected beam. Scintillators, Gas Electron Multiplier chambers and other beam loss monitors measure nuclear loss rates induced by the interaction of the beam halo in the crystal. Two Roman pots installed in the path of the deflected particles are equipped with a Medipix detector to reconstruct the transverse distribution of the impinging beam. Finally UA9 takes advantage of an
LHC-collimator prototype installed close to the first Roman pot to help in setting the beam conditions and to analyze the efficiency to deflect the beam. I describe the hardware installed to study the crystal collimation during the various data taking periods in 2009-2011 and the challenges for the upgrade of the system to study crystal collimation on the LHC
for the collaboration
UA9 collaboration
