1. Energy deposition studies on magnets. Aim. First applications
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
NED's Meeting CERN
12/06/09

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

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

4. First applications Geometry layout for the triplet scaling laws
Simplified IR region
Vacuum chambers
TAS
Beam Screens
NED's Meeting CERN
12/06/09

5. First applications D0 study
Geometry layout with a simple copper cylinder
NED's Meeting CERN
12/06/09

6. First results Tracking results P-P collisions
High energy particles in the forward direction
Low energy particles with transverse momentum
NED's Meeting CERN
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
NED's Meeting CERN
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
NED's Meeting CERN
12/06/09

9. Planning Computation on progress Next steps
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
NED's Meeting CERN
12/06/09