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 laide de beaucoup de monde … et du travaille

Aujourdhui

Et pour Noël de cett année Comparison of p t /p t (Preliminary) HARP TPC dE/dx (Preliminary) Protons Muons and pions Electrons? Relativistic rise

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 Paramètres Détecteur des traces pour MICE Le project TPG pour MICE: Edda, Rikard, Jean-Pierre, Pierre

Harp Mice GEMHexaboard 300µm pads total: 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 12 Neutrino Beam Neutrino Beam Beam Monitors Beam Monitors Front Detectors Front Detectors = 1.3 GeV = 1.3 GeV almost pure : ~98% almost pure : ~98% Super-Kamiokande 50 kton water 50 kton water cherenkov detector Beam MC confirmed by Pion Monitor E (GeV)) oscillation peak far/near First HARP analysis already in progress: To be measured by HARP Estimate neutrino fluxes for K2K and MiniBooNE experiments (K2K example)

K2K analysis in HARP oscillation peak Neutrino spectrum in K2K near detector K2Kinterest (P, ) of pions producing neutrinos in the osc. peak P > 1 GeV K2K interest K2K interest Geometrical Acceptance of HARP (forward)

Corne Nufact Test mécaniques termines Nouvelle alimentation ( 100 kA, 100 s, 0.5 Hz) Preparation du voyage pour Paris

Au revoir au prochaine année avec des autres bonnes nouvelles Buon Natale