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Antimatter (e+, Ps, H-bar) physics Laboratory Lea Di Noto Department of Physics –University of Trento INFN.

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Presentation on theme: "Antimatter (e+, Ps, H-bar) physics Laboratory Lea Di Noto Department of Physics –University of Trento INFN."— Presentation transcript:

1 Antimatter (e+, Ps, H-bar) physics Laboratory Lea Di Noto Department of Physics –University of Trento INFN

2 Research group Roberto S. Brusa S. Mariazzi ( assegnista cof. INFN) L. Di Noto (PhD) L. Penasa (tecnico l) M. Bettonte (tecnico nl) Giancarlo Nebbia (INFN) G. Ferrari (CNR) e+ - Ps detectors laser

3 AEgIS (antimatter experiment :gravity interferometry spectroscopy) Goals: Measurement of g on anti-hydrogen Anti-hydrogen spectroscopy Methods: – Produce an Hbar beam – Moirè deflectometer Motivations: verify the Weak equivalence principle (WEP) Verify the CPT antimatter disappearance

4 p 5 T - 4K trap Moirè Deflectometer Positron source Positron accumulator Transfer line 1 T mK Anti-hydrogen production AD SIDE 4 /31 activities of Trento group activities of Trento group 13 2 e+ beam Ps spectroscopy Ps cooling & converter

5 AEgIS experiment in short Antiprotons 100 mK 2 ns bunch 10 8 positronis (1 mm in diameter) Positron-cooled positronium converter Moirè deflectometer Anti hydrogen beam Stark acceleration Lasers for Ps excitation in Rydberg states

6 1. Pulsed positron beam

7 2. Positronium cooling & converter Ps Positronium converter Positron beam Ps Vacuum Ps Mariazzi S, Salemi A and Brusa R S 2008 Phys. Rev. B

8 2 channeltrons target position 5 NaI scintillators Trento TOF Apparatus Trento TOF Apparatus BEAM Prompt peak 16 ns zozo

9 Mariazzi S, Salemi A and Brusa R S 2008 Phys. Rev. B Ps cooling – first result of Ps cooling Mariazzi, Bettotti, Brusa, 2010 Phys. Rev. Lett

10 Permanence time of Ps in nano-channels before escaping into vacuum Permanence time of Ps in nano-channels before escaping into vacuum = + tftf tptp z0z0 Ps energy spectra t p = 18 ns

11 Tunable nanochannels will allow to study: Cooling and thermalization at temperature < 150 K Cooling and thermalization in presence of decorated surfaces Relations between diffusion and tortuosity with the TOF apparatus at the intense positron source NEPOMUC at the FRMII reactor

12 p 5 T - 4K trap Moirè Deflectometer Positron source Positron accumulator Transfer line 1 T mK Anti-hydrogen production AD SIDE 12 /31 3 Ps spectroscopy 3. Ps spectroscopy 3. Ps spectroscopy

13 Our simulation to transport positron bunch from accumulator to the target with duration of 5 ns and a spot of 3 mm diameter ! Buncher Magnetic field terminator Valve sample Detector ports

14 Three tilted flange 3 Tilted CF16 Flange 45°

15 FIRST GOAL: Study of production efficiency of Ps in Rydberg state OTHER GOAL: Rydberg state in presence of magnetic field Motional stark effect Ps laser cooling Jump between different levels (microwave) METHOD: Ps production and detection by PbF2 scintillator Excitation up to n=3 Excitation from n=3 to n>15 n=3 continuum n= eV 205 nm high n ~0.75 eV ~1650 nm Planned experiments with Ps chamber

16 Our work is about: Running AEgIS positron bunched beam Ps production in AEgIS Foundamental studies on Ps cooling (TOF at FRMII-Munich) Development of a new apparatus for Ps spectroscopy measurements Summary

17 Preventivo 2013 Missioni interne 3 k Missioni estere 22 k + 8 k (sub iudice) Materiale di consumo 4 k per materiale da vuoto Impianti attrezzature 0 Altre immobilizzazioni 22 k -8 k per 5 switch -12 k per gruppo pompaggio (Turbo, scroll, ionica) -2 k per valvola


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