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LIU external beam dump review External beam dump option A: branching off from LSS6

30 th July 2014. LIU external beam dump review External beam dump option A: branching off from LSS6. J.L. Abelleira. Thanks to: F. Velotti, B. Goddard, M. Meddahi, H. Vincke , R. Fernández Ortega, B. Blanco, L. Faisandel, A. Fabich , K. Cornelis. Branching off from LSS6.

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LIU external beam dump review External beam dump option A: branching off from LSS6

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  1. 30th July 2014 LIU external beam dump reviewExternal beam dump option A: branching off from LSS6 J.L. Abelleira • Thanks to: F.Velotti, B. Goddard, M. Meddahi,H. Vincke, R. Fernández Ortega, B. Blanco, L. Faisandel, A. Fabich, K. Cornelis

  2. Branching off from LSS6 This talk summarizes the different possibilities to install a beam dump using the LSS6 extraction system and profiting from the existing tunnels Summary: • Locations for the dump tunnel • Magnets and optics • HiRadMat: operational issues TT61 TNC External beam dump option A: branching off from LSS6

  3. Dump locations • Different locations have been explored: TT61 and TNC Beam Fast extraction LSS6 External beam dump option A: branching off from LSS6

  4. TT61: Magnets In place of 4xMBS 2xMBB 2xMBB 2xMBB 4xMBS External beam dump option A: branching off from LSS6

  5. TT61: vertical bending There are three options for the vertical plane: Use existing TT61 till the end (with its slope) Excavate new tunnel under TT61 to bend the beam to the horizontal Bend the beam with an intermediate angle ϴ80 mrad 0<ϴ<80 mrad ϴ 40 mrad ϴ0 Beam External beam dump option A: branching off from LSS6

  6. TT61: Option 1. vertical bending Option 1 consists in using the existing TT61 tunnel. • 6 MBE will bend the beam by 40 mrad, required to follow the tunnel • No need for civil engineering. • The tunnel has an inclination which leads to the surface. Beam Beam 100 m 6xMBE SPS external dump study

  7. TT61: Option 1. lateral shielding • Do we have enough shielding to HiRadMat? • 3-meter separation*: enough to avoid activation but masks HiRadMat operation • 8-meter separation*: needed to not radiate HiRadMat End HiRadMat 3 m Position of the dump to not radiate HiRadMat Beam 100 m H. Vincke SPS external dump study

  8. TT61: Option 1. surface shielding 600 m SPS external dump study

  9. TT61: Option 1 One could think of such a shielding…. The shielding will provide a muon dose < 10 S/year on the surface*: 600 m ~ 4000 m3 of concrete to cost ~1.8M € + Blockage of the line SPS external dump study *See H. Vincke’s talk

  10. TT61: Option 2 We could also bend horizontally and use the soil (molasse) as shielding 3.4 m >140 m SPS external dump study

  11. TT61: Option 2 • Option 2 consists on excavating the tunnel to send the beam horizontally. • It requires a big effort in terms of civil engineering • Same vertical magnets as in option 1, but with opposite polarity 3 m As in option 1, we could extend the line SPS external dump study

  12. TT61: Option 3 Bending with 0<ϴ<80 mrad and use the ground as shielding More than 500 m, less than 10 Sv year B. Blanco, R. Fernandez (GS/SE) SPS external dump study

  13. TT61: Option 3 Muon dose for 2E18 protons being sent on a Carbon/Iron dump being followed by concrete* to stop all muons *Assume the same shielding for molasse From H. Vincke’s talk SPS external dump study

  14. TT61: Option 3 • Option 3 can help alleviate the tight constraints on the civil engineering for a safely radiation to the surface. • In order to define the angle, we have to find a compromise between magnet cost, civil engineering cost and radiation. • We have already a relation between the angle and the length of natural shielding. • It looks like the most promising option for a dump in TT61. • Is it feasible to excavate the tunnel? SPS external dump study

  15. TNC Beam dump ~170 m Beam direction External beam dump option A: branching off from LSS6

  16. TNC: dump location Potential location of the dump dump Soil water activation? A Fabich External beam dump option A: branching off from LSS6

  17. TNC. Dump beam line Only a set of elements added: Beam direction 3xMBS@1.23 T External beam dump option A: branching off from LSS6

  18. TNC Beam direction Actual HiRadMat dump will need to be moved. External beam dump option A: branching off from LSS6

  19. TNC: Optics, beam sizes and dump Beam diverges: no need for additional quadrupoles Particles in dump LIU HL-LHC 5-sigma beam sizes External beam dump option A: branching off from LSS6

  20. TNC: operational aspects • The TNC-option is the most interesting one in terms of civil engineering costs, but the impact on HiRadMat operation shall be included in the considerations. • A typical HRM experiment takes place once a month. Roughly 3 accesses are needed: • The conditions of HiRadMat access are detailed in EDMS-1155061 (link), which also indicates the times required for activation cool down of air and the following flush ventilation. A. Fabich External beam dump option A: branching off from LSS6

  21. TNC: Integration implications: • Detailed integration studies to be performed. • At first: • Without a modification of the present HRM line there is almost no space available for installation of the beam dump line • Modifying the HRM beam line. Need to displace all the beam line, including a major intervention of the existing dump. • - Element highly activated • If moved to the right, the access/service corridor is narrowed • These integration works need a detailed technical study A. Fabich External beam dump option A: branching off from LSS6

  22. TNC: RP implications • Possible issues: • Water activation. • Access in TT61 • If we need to locate the beam dump in the center of the cavern, additional beam elements will be needed and will imply additional complications with the integration with HIRADMAT. • An upgrade of the present ventilation system may be necessary A. Fabich, H. Vincke External beam dump option A: branching off from LSS6

  23. Summary of all the options • For all the options considered: • Interlock system issues (same as in LSS4-option) • HiRadMat access in case of beam loss External beam dump option A: branching off from LSS6

  24. Preliminary cost estimation • No cost estimation for the civil works • We have spare MBE, QTL • Need for the switches (MBS) • - TT61: ~1.44 MCHF* • - TNC: ~0.64 MCHF * • (including power converters) • TED-like block: 0.5MCHF • Shielding block: 13k€ • Vacuum systems to be checked *400kCHF per power converter 80kCHF per MBS unit See F. Velotti’s talk External beam dump option A: branching off from LSS6

  25. Conclusions • The most feasible option is TNC, but it is not compatible with HiRadMat operation. • TT61 option 3 is the most promising option compatible with HiRadMat operation, but the difficulty of the civil works is even harder than in LSS4 External beam dump option A: branching off from LSS6

  26. Thank you… …For your attention External beam dump option A: branching off from LSS6

  27. backup External beam dump option A: branching off from LSS6

  28. backup estimation of the expected protons per year to be dumped in the SPS, after LS2 backup F. Velotti External beam dump option A: branching off from LSS6

  29. backup External beam dump option A: branching off from LSS6

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