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Energy Deposition Studies on Magnets: Initial Findings and Collaborative Planning

This project aims to set up a collision product tracking facility for integrating energy deposition issues in magnet design. The first applications include scaling laws, triplet geometry layout, and studying energy deposition results from particle collisions. Planning involves computation, parameter studies, and dose estimations for design optimization. Collaboration with INFN/CERN seeks to validate results and optimize magnet designs for future applications.

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Energy Deposition Studies on Magnets: Initial Findings and Collaborative 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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