3-5 September 2007
Europe/Zurich timezone

Irradiation damage in LHC beam collimating materials

4 Sep 2007, 15:55
40-S2-D01 (CERN)



Geneva, Switzerland
Irradiation damage in LHC beam collimating materials Session 3: Experimental results and future tests / test station




Demand for high-performance materials that can safely intercept the LHC proton beam has prompted an extensive experimental study focusing on material degradation due to long radiation exposure. Given the multi-MW class of the beam interception process at LHC combined with the stringent positional requirements on the intercepting elements, the envelope of the current knowledge regarding material behavior and endurance for both short and long exposure needs to be extended. For the collimating structures intercepting the halo of an intense beam under normal or the entire beam during off-normal conditions, performance issues are essential and directly tied to materials and their ability to maintain key properties and absorb beam-induced shock. The limitations of most materials in playing such pivotal roles have led to an extensive search and experimentation with new alloys and composites that appear to possess the right combination of properties. Post-irradiation analysis results following exposure to the 200 MeV protons at the end of the BNL Linac will be presented. In addition, preliminary results of estimated neutron-induced damage on LHC materials will be discussed as a result of experimentation with a “unique” neutron source at BNL. Co-authors: MOKHOV Nikolai (BNL)

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