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Energy deposition studies on magnets Aim First applications First Results Planning

Energy deposition studies on magnets Aim First applications First Results Planning. Collaboration INFN /CERN (AT/MAS/MA) F. Broggi, C. Hoa , J-P. Koutchouk, G. Sterbini, E. Wildner. Aim.

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Energy deposition studies on magnets Aim First applications First Results Planning

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  1. Energy deposition studies on magnetsAim First applications First Results Planning Collaboration INFN /CERN (AT/MAS/MA) F. Broggi, C. Hoa , J-P. Koutchouk, G. Sterbini, E. Wildner 12/06/09

  2. Aim • Set up a collision product tracking facility that allows integrating energy deposition issues at the magnet design stage. 12/06/09

  3. Q3 Q3 Q2 Q2 Q1 Q1 Q1 Q1 Q2 Q2 Q3 Q3 D0 D0 IP IP First applications • Scaling lawof Energy deposition vs. different parameters for low beta quadrupoles • l* distance IP-Q1=23, 19, 16, 13 m • Aperture of the coils > 70 mm • Early separation scheme (D0 separator dipole close to the IP) for the LHC upgrade 12/06/09

  4. First applications • Geometry layout for the triplet scaling laws • Simplified IR region • Vacuum chambers • TAS • Beam Screens 12/06/09

  5. First applications • D0 study • Geometry layout with a simple copper cylinder 12/06/09

  6. First results • Tracking results • P-P collisions • High energy particles in the forward direction • Low energy particles with transverse momentum 12/06/09

  7. First results • Tracking results • Impinging Power w.r.t to the distance to the IP • Energy range of particles • Geometrical parameters • Aperture and thickness • Solid angle amplitude • Fixed longitudinal length • Non intuitive law P=f(z) • Investigations in progress Aperture and thickness ∆ z distance to the IP Fixed length of 1 m 12/06/09

  8. First results • Energy deposition • Power absorbed by the D0 : 34 W Seems reasonable with average 8.6 mW/cm3 and peak 50 mW/cm3 12 mW/cm3 • Total 34 W • 52% photons • 18.5% pions – • 16.5 %pions + • 1.6 % neutrons • 1.3% protons • 10% others 12/06/09

  9. Planning • Computation on progress • Parameter studies for the scaling law on Power Deposition time scale: Valencia’s workshop • Energy deposited in D0: double-checks going on by calc. the TAS. If confirmed, no show-stopper. • Next steps • Reference case: nominal LHC low beta NbTi quad in IR1 and IR5 • Find agreement with N. Mokhov’s (FNAL) results (MARS) and the CERN/INFN model (FLUKA) including updated description of the geometry and the magnetic fields including detector magnets • Energy deposition/dose estimations on coil’s insulation for design optimization 12/06/09

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