Scientific investigations performed at RRC KI for EUCARD Project (W8) in the period 01.04.2010-13.09.2010 : ColMat - Collimators & materials for higher beam power beam (Work package 8) Task 2. Modelling, Materials, Tests for Hadron Beams. Sub-task 3. Materials and thermal shock waves. Sub-task 4: Radiation damage. “Theoretical modeling of shock wave formation and radiation damage production in irradiated collimator materials for LHC by protons with energies 450 GeV”. A.I.Ryazanov*, E.V.Semenov*,A.A.Shvets*, A.V.Stepakov*, R.Assmann**, A.Ferrary**, R.Schmidt** *Russian Research Centre “Kurchatov Institute”, 123182, Moscow, Kurchatov Sq.1, Russia **CERN CH-1211 Geneva 23, Switzerland ColMat WP8 Meeting , 13.09.2010, GSI, Germany

ColMat WP8 Meeting , 13.09.2010, GSI, Germany Density and ionic temperature changes under shock wave propagation in assembled materials Cu – C (“sandwich structures”) under 450 GeV proton beam irradiation at different number of bunches Density 1000 bunches (25000 нс) 200 bunches (5000 нс) Temperature 1000 bunches (25000 нс) 200 bunches (5000 нс) ColMat WP8 Meeting , 13.09.2010, GSI, Germany

ColMat WP8 Meeting , 13.09.2010, GSI, Germany Internal stress changes under shock wave propagation in assembled materials Cu – C (“sandwich structures”) under 450 GeV proton beam irradiation at different number of bunches 200 bunches (5000 нс) 400 bunches (10000 нс) 600 bunches (15000 нс) 1000 bunches (25000 нс) ColMat WP8 Meeting , 13.09.2010, GSI, Germany

1st annual meeting of EuCARD, 14.04.2010, Oxford shire-UK The calculations of generation rates of primary radiation damage (dpa/c ) per bunch in graphite by secondary pions and electrons under 450 GeV proton beam 1st annual meeting of EuCARD, 14.04.2010, Oxford shire-UK

Displacement Radiation Damage Processes in LHC Collimator Materials Clusters Clusters ColMat WP8 Meeting , 13.09.2010, GSI, Germany

ColMat WP8 Meeting , 13.09.2010, GSI, Germany Graphite Copper ColMat WP8 Meeting , 13.09.2010, GSI, Germany

ColMat WP8 Meeting , 13.09.2010, GSI, Germany PKA SKA λPKA λPKA Mean free path Rsub Rsub Average size of damage region Sub-cascade formation criterion: λPKA ≥ Rsub ColMat WP8 Meeting , 13.09.2010, GSI, Germany

ColMat WP8 Meeting , 13.09.2010, GSI, Germany Developments of theoretical models and numerical calculations of cascades and sub-cascade formation in C collimator materials of LHC under proton beam irradiation with the energy 450 GeV Calculations of sub-cascade number formation in graphite in the dependence on PKA energy ColMat WP8 Meeting , 13.09.2010, GSI, Germany

ColMat WP8 Meeting , 13.09.2010, GSI, Germany The calculation of generation rate of sub-cascades in for a single bunch of 450 GeV protons produced by secondary fast neutrons ColMat WP8 Meeting , 13.09.2010, GSI, Germany

ColMat WP8 Meeting , 13.09.2010, GSI, Germany The calculation of generation rates of sub-cascades in C for a single bunch of 450 GeV protons produced by fast secondary electrons and pions ColMat WP8 Meeting , 13.09.2010, GSI, Germany

ColMat WP8 Meeting , 13.09.2010, GSI, Germany Experimental Tests of Irradiation Effects on Degradation of Physical-mechanical Properties of Collimator Materials for Phase II at RRC KI during 2010-2012 years 1.Experimental Tests Materials: Copper-Diamond Aluminum-Diamond Silver-Diamond SiC Molibdenum-Diamond Physical – mechanical property measurements before and after proton irradiation at room temperature (<100˚C) : - Thermal expansion. - Thermal conductivity. - Electrical conductivity. - Mechanical compression and tensile tests. - Measurement of Young’s Modulus. 2. Theoretical modeling of shock wave propagation and radiation damage formation in collimator materials under 450 GeV and 7 TeV protons ColMat WP8 Meeting , 13.09.2010, GSI, Germany