FIRST THOUGHTS ON USE OF SUPERCONDUCTING MAGNETS IN

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FIRST THOUGHTS ON USE OF SUPERCONDUCTING MAGNETS IN IR 7 FOR HE-LHC AND COLLIMATION

FIRST THOUGHTS ON USE OF SUPERCONDUCTING MAGNETS IN IR 7 FOR HE-LHC AND COLLIMATION STUDY WORKFLOW C. Bahamonde, F. Cerutti, A. Lechner, E. Skordis in collaboration with the BE-ABP collimation team FCC collimation design meeting #15 joint with HE-LHC 2017 December 8 th 1

OUTLINE • the betatron cleaning insertion in the LHC: warm magnet exposure • extrapolation

OUTLINE • the betatron cleaning insertion in the LHC: warm magnet exposure • extrapolation to HE-LHC • shielding performance • simulation workflow 2017 December 8 th F. Cerutti HE-LHC thoughts FCC coll. meeting #15 2

LHC IR 7 LAYOUT primary collimators warm dipoles secondary collimator warm quadrupoles passive absorbers

LHC IR 7 LAYOUT primary collimators warm dipoles secondary collimator warm quadrupoles passive absorbers 2017 December 8 th F. Cerutti HE-LHC thoughts FCC coll. meeting #15 3

WARM QUADRUPOLES AND COIL PROTECTION 2017 December 8 th F. Cerutti HE-LHC thoughts FCC

WARM QUADRUPOLES AND COIL PROTECTION 2017 December 8 th F. Cerutti HE-LHC thoughts FCC coll. meeting #15 4

“ANNUAL” DOSE for 1. 15 1016 protons on the IR 7 collimators 2017 December

“ANNUAL” DOSE for 1. 15 1016 protons on the IR 7 collimators 2017 December 8 th F. Cerutti HE-LHC thoughts FCC coll. meeting #15 5

RADIAL DEPENDENCE for 1. 15 1016 protons on the IR 7 collimators 2017 December

RADIAL DEPENDENCE for 1. 15 1016 protons on the IR 7 collimators 2017 December 8 th F. Cerutti HE-LHC thoughts FCC coll. meeting #15 6

FROM DOSE TO POWER DENSITY dose [Gy] / (1. 15 1016 [p/y]) * instantaneous

FROM DOSE TO POWER DENSITY dose [Gy] / (1. 15 1016 [p/y]) * instantaneous loss rate [p/s] * rho [g/cm 3] = power density [m. W/cm 3] · HE-LHC beam (2800 * 2. 3 1011 p) lifetime of 12 minutes 9 1011 p/s · rho = 8 g/cm 3 HE-LHC power density [m. W/cm 3] = 620 * (LHC dose [MGy] * 2) where the factor 2 tentatively reflects the beam energy doubling One shall expect up to a few (3 -5) W/cm 3 at the superconducting coil aperture in the betatron cleaning insertion, i. e. two to three orders of magnitude above the quench limit range 2017 December 8 th F. Cerutti HE-LHC thoughts FCC coll. meeting #15 7

A GLIMPSE OF SHIELDING EFFECTIVENESS studies for the HL-LHC and FCC-hh triplet protection from

A GLIMPSE OF SHIELDING EFFECTIVENESS studies for the HL-LHC and FCC-hh triplet protection from the collision debris from 3. 7 mm of stainless steel to 10 mm of tungsten from 15 mm of tungsten to 55 mm of tungsten factor 10 13 factor 10 2017 December 8 th F. Cerutti HE-LHC thoughts FCC coll. meeting #15 8

SIMULATION WORKFLOW (FIRST STEP) through beam halo tracking, production of a map of proton

SIMULATION WORKFLOW (FIRST STEP) through beam halo tracking, production of a map of proton impacts on the collimators surface (touches) … 2017 December 8 th F. Cerutti HE-LHC thoughts FCC coll. meeting #15 9

SIMULATION WORKFLOW (SECOND STEP) … used as input for shower calculations in the Long

SIMULATION WORKFLOW (SECOND STEP) … used as input for shower calculations in the Long Straight Section TCP Q 4 TCP Beam 1 IP 7 Q 5 2015 PROTON QUENCH TEST BLM integration Time: RS 12 Simulation Normalisation: 1. 766 1012 lost protons 2017 December 8 th F. Cerutti HE-LHC thoughts FCC coll. meeting #15 10

SUMMARY v the use of superconducting magnets in the betatron cleaning insertion looks extremely

SUMMARY v the use of superconducting magnets in the betatron cleaning insertion looks extremely challenging, implying a massive shielding heavily impacting the magnet aperture v energy deposition studies are going to follow the validated two(three)-step simulation chain v the close involvement of magnet designers is essential to search for a shielding solution if any (which margins for a normal conducting option? ) 2017 December 8 th F. Cerutti HE-LHC thoughts FCC coll. meeting #15 11

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