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Additional Iron Shield for LHCb Muon Chambers M5

Detailed information on the construction and installation of the iron shield behind the MUON chambers M5, including dimensions, weight calculations, availability of iron blocks, surface treatment plans, and the project schedule.

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Additional Iron Shield for LHCb Muon Chambers M5

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  1. LHCb MUON - ADDITIONNAL SHIELD BEHIND M5 – UNIT AREA 700 200 600 600 Dimensions of 1 iron brick  100 x 100 x 200 mm3 1 ROW of 1200 mm length  12 iron blocks / row Shielding area 1200 x 700 mm2  7 x 12 = 84 iron blocks Shielding area 4800 x 700 mm2  4 x 84 = 336 iron blocks Weight of 1 iron brick  15 kg Total weight of shield  5040 kg D.LACARRERE

  2. ADDITIONNAL IRON SHIELD BEHIND MUON CHAMBERS M5 2400 BELT (*) 700 IRON BLOCKS MF4 NO SCALE (*) Belt in order to fix the iron blocks – not yet defined D.LACARRERE

  3. STATUS 5 DECEMBER 2011 (in brief) • IRON BLOCKS : ~ 400 blocks available (250 at Pit2 + 150 at Pit8) ; non “TFA” • - RP CHECK : Ask for authorization to blast the blocks – corroded surfaces - on going • SURFACE TREATMENT (in preparation) : • a) blasting with special sand (garnet 30-60 mesh) – DAI 479609 08/11/2011 • b) painting before x-mas – drying during Christmas break. • SCHEDULE : • 1 - Blasting week 12/12/2011 • 2 - Painting week 19/12/2011 • 3 - Installation top of MF4 – mid-January 2012 (to be specified by Muon Group) D.LACARRERE

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