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R2E Attenuation Estimate UL14/16 – UL56

R2E Attenuation Estimate UL14/16 – UL56. R. Versaci , M. Brugger (EN/STI). UL14/16 (High-E Hadron Fluence /Nominal Year). Spoiler Only. Spoiler & Plug. Spoiler & Chicane 1. Spoiler & Chicane 2. UL14/16 (High-E Hadron Fluence ). Unshielded (as today).

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R2E Attenuation Estimate UL14/16 – UL56

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  1. R2E Attenuation EstimateUL14/16 – UL56 R. Versaci, M. Brugger (EN/STI)

  2. UL14/16 (High-E HadronFluence/Nominal Year) Spoiler Only Spoiler & Plug Spoiler & Chicane 1 Spoiler & Chicane 2

  3. UL14/16 (High-E HadronFluence) Unshielded (as today) • Determine attenuation towards UL14/16 • For various ‘shielding’ scenarios • 2012/13 we’ll most probably not reach more than some 10% X X X X X X X X X X X X X X X X Gradient for comparison

  4. UL14/16 (High-E HadronFluence)

  5. UL56 (High-E HadronFluence) Transition from UJ57 into UL (towards Bypass) • Determine attenuation towards Bypass • Is a distance of ~34m ok(from the UL/UJ junction)? X X X X X X X X X Gradient used for estimate X X X X X X X X X X X X X

  6. UL56 (High-E HadronFluence) At >30m we’re certainly ok

  7. ‘Conclusion’ • With the reduced shielding (-20cm) we have no ‘safety’ margin -> we just ‘touch’ the 107cm-2y-1 • To be kept in mind, upgrade possible at later stage(in the current shielding layout we’re dominated by the lateral ‘source’) • Chicane solutions for UJ-UL14/16 are ok (from a radiation level point of view) • We can live without a plug, certainly for 2013/14, perhaps forever (do we really need it?) • UL56 -> distance of 30m carries enough safety margin to place the racks -> monitoring for UJ/UL junction recommended

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