congresso del dipartimento di fisica highlights in physics 2005
DESCRIPTION
K+. _. e+. light. µ+. e +. Ionizing Track. Run 939 Event 46. p K + e. +. Drifting. e -. K +. p=425 MeV. 3 m. 20 m. Congresso del Dipartimento di Fisica Highlights in Physics 2005 11–14 October 2005, Dipartimento di Fisica, Universit à di Milano - PowerPoint PPT PresentationTRANSCRIPT
Congresso del Dipartimento di Fisica
Highlights in Physics 200511–14 October 2005, Dipartimento di Fisica, Università di Milano
Icarus: a multipurpose detector; the simulation codesG. Battistoni*, A. Ferrari*†, S. Muraro* and P.R. Sala*
*INFN sezione di Milano†on leave at CERN
The ICARUS experiment has a vast physics program, including proton decay, and neutrino oscillations from natural and artificial sources. The so-called T600 detector, composed by two modules, 300 tons of Liquid Argon each, is now in the Gran Sasso Hall B and will be operational next year
Drifting
Ionizing Track
e-
lightIonization in LiquidArgon
Drift in E field
Induced/collected signals on wire grids
2-dim views: wire vs. drift time
3-d reconstruction with 3 wire planes
K[AB] [BC] e[CD]
K+
µ+ e+
Run 939 Event 46K+
+
e+
p K+ e
_
p=425 MeV
CERN Neutrino to Gran Sasso: ν beam from 400GeV proton beam, 732 km path to Gran Sasso Laboratory.
Main aim is the direct detection of τ neutrinos from νμ → ντ oscillation
FLUKA simulation includes all details of beam transport, interaction, structure of target, horn focusing, decay, etc.
Used for engineering calculations and for the prediction of ν fluxes at Gran Sasso
20 m
3 m
The detection Principle :LAr Time Projection Chamber:An electronic bubble chamber with 3mm resolution + calorimetry
Hadronic Interaction. Real event in 2001 test
Proton decay : a test of baryon Number conservation. Important for GUT theories and matter-antimatter asymmetry
FLUKA is an interaction and transport MonteCarlo code, used for many applications from high energy physics to microdosimetry. It is an INFN-CERN project. Special developments/applications for ICARUS from INFN-Milano and CERN
FLUKA simulated proton decay eventIn T600
CNGS beam line FLUKA simulated νμ flux
Three flavor oscillations with matter effect, for νμ→νe studies in view of the determination of the theta13 parameter have
been recently coupled to CNGS and atmospheric analysis
The plot shows the expected νe
and ντ spectra for the CNGS beam, with and without 3-F
oscillation
To identify p decay in an Ar nucleus, It is essential to
understand and reproduce nuclear effects, such as Fermi motion, binding energy, reinteraction of
decay products inside the nucleus: Handled by the FLUKA nuclear
model
Real event with K decay
Oscillation of atmospheric ν has been detected in the
SuperKamiokande experiment. However, a better understanding
of theoretical flux and experimental systematics would be welcome
Fluka simulations of cosmic showers in atmosphere, including geomagnetic
effects have been set up and checked: here muon spectrum at ground level,
simulated (line) and expt (dots)
Result: first full 3-D simulation of atm. ν
Coupled to simulation of ν interactions, with nuclear effects, and full ICARUS
simulation of tracks in the detector
ReferencesS. Amerio et al. (ICARUS coll.) NIM A 527, 329 (2004) P. Aprili et al (ICARUS coll.) LNGS-P28/2001 and CERN-SPSC-2002-027A. Fasso et al. FLUKA, CERN yellow report , INFN/TC_05/11, in press; A. Fasso et al., arXiv:hep-ph/0306267; www.fluka.orgG. Acquistapace et al., NGS, CERN-98-02 (1998); R. Baldy et al., INFN/AE-99/05 and CERN SL-
99-034 DI (1999)A. Ferrari et al., Nucl. Phys. B - Proc.Suppl. 145,93 (2005)G. Battistoni et al., Astropart. Phys 12, 315 (2000); Astropart. Phys. 19,269 (2004); Astropart. Phys.
17, 477 (2002)ICARUS upgraded analysis , ICARUS TM/05-04