Une petite lettre à Père Noël….
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Transcript of Une petite lettre à Père Noël….
Une petite lettre à Père Noël….
A. Blondel, G. Prior, S. Borghi,R.Sandström,E.Gschwendtner, A. Cervera, P. Bene, J.-P. Richeux,S. Gilardoni
Harp
TPC: Silvia, Gersende
NDC: Anselmo
Il y a un an:
la TPC,cette inconnue
Avec l’aide de beaucoup de monde
… et du travaille
Aujourd’hui
Et pour Noël de cett’ année
Comparison of pt/pt(Preliminary)HARP TPC dE/dx
(Preliminary)
Protons
Muonsand pions
Electrons?
Relativistic rise
)β(A
21
Mice @ RAL:Proposal approuvé
The review committee...
• Light in the longitudinal direction– As little as possible material in
the beam– Light and uniform material for
the readout amplification and readout planes
– Electronics and connections out of the beam region
• Capable to stand high particle flux• In an a harsh environment due to
X-ray background from RF cavity dark currents (large amount of spurious hits)
• TPC: 1m long, 30cm diameter of the active area (40cm diameter field-cage)
• Gas choice– To minimize the material in the
beam and to keep the X-ray conversions to the minimum, a He-based mix is preferred. (He/CH4, He/CO2)
• Amplification– By a 3-GEM structure. Large
gains are needed if one wants to use a He-based mix
• Readout– In 3 projections, over about 710K
hexagonal pads in a 30cm diameter disk
MICE TPG ParamètresDétecteur des traces pour MICE
Le project TPG pour MICE: Edda, Rikard, Jean-Pierre, Pierre
Harp Mice GEM Hexaboard
300µm padstotal: 710000 pads
2mm gap
30cm diameter
60µm
e
COMPLETE DETECTOR TESTS NOW!
Simulation de la TPG et G4MICE
• Simulation du détecteur Modélisation du bruit du fond du au RF
tout ça en Geant4
Experience K2K: les premieres shifts(Anselmo, Silvia, Alain)
K2K and HARP• First long baseline (250km)
neutrino experiment• To investigate neutrino oscillation
observed in atmospheric neutrinos by Super-Kamiokande
250 km
250 km
12 GeV-PS@KEK12 GeV-PS@KEKNeutrino BeamNeutrino BeamBeam MonitorsBeam MonitorsFront DetectorsFront Detectors
<E<E> = 1.3 GeV> = 1.3 GeV almost pure almost pure : ~98%: ~98%
Super-KamiokandeSuper-Kamiokande 50 kton water 50 kton water cherenkov detectorcherenkov detector
Beam MC Beam MCconfirmed byPion Monitor
0.5 1.0 1.5 2.0 2.50 E(GeV))
oscillation peakfa
r/ne
ar
• First HARP analysis already in progress:
To be measured by HARP
Estimate neutrino fluxes for K2K and MiniBooNE experiments
(K2K example)
K2K analysisin HARP
oscillation peak
Neutrino spectrum in K2K near detector
GeVE 75.05.0
mrad
GeVP
250
1
K2KK2K
interestinterest
(P, ) of pions producingneutrinos in the osc. peak
P > 1 GeV
mradsx ]250 ,250[
K2Kinterest
K2Kinterest
Geometrical Acceptance of HARP (forward)
Corne Nufact
•Test mécaniques terminesNouvelle alimentation ( 100 kA, 100 s, 0.5 Hz)Preparation du voyage pour Paris
Au revoir auprochaine année
avec des autresbonnes nouvelles
Buon Natale