Precision measurements of the beta neutrino correlation in the WI Electrostatic Ion Trap

1. Precision measurements of the beta neutrino correlation in the WI Electrostatic Ion Trap Fundamental Interactions with Atom and Ion Traps Conference Sergey Vaintraub

2. Where to search for beyond SM Physics? • Brute force (“Swifter, Higher, Stronger”): • Go higher in energy/luminosity • LHC/Tevatron/ILC • Finesse: • High precision experiments • Detect the effect of beyond SM on low energy observables • For example βν correlation measurements Sergey Vaintraub

3. 6He beta decay 6Li daughter nucleus e- Electron βν correlation Pure Gamow-Teller q neElectron anti-neutrino • New physics beyond the Standard Model’s • V-A structure Sergey Vaintraub

4. Setup scheme EIBT 30o magnet Neutron generator Trap chamber 1 m Sergey Vaintraub

5. 6He beta decay at EIBT Electrons detector e- Entrance mirror Exit mirror 6Li++ MCP MCP Electrons collected at position sensitive plastic scintillator 6Li ions collected at MCP detectors Sergey Vaintraub

6. Cosqen ~ 1 Electrons detector e- n- Entrance mirror Exit mirror MCP MCP 6Li++ • e and n are in the same direction, hence momentum of recoiling 6Li is maximum AND in the opposite direction. Some of 6Li ions will miss MCP at its periphery Sergey Vaintraub

7. Cosqen ~ -1 Electrons detector e- Entrance mirror Exit mirror 6Li++ MCP n- MCP • e and n are in opposite directions, hence momentum of recoiling 6Li is small. Some of 6Li ions will go though MCP hole Sergey Vaintraub

8. Losses Mechanisms Sergey Vaintraub

9. Statistical precision • In order to go below 1% statistical precision one should accumulate about one million coincidences Sergey Vaintraub

10. Present Setup

11. Trap chamber DT-NG DT-NG furnace EBIT Beam optics 300 magnet 7 m A. Neutron Generator • D + T → n + 4He   En = 14.2 MeV, • Production rate~1010 n/s • Ordered from VNIIA (Russia). Setup Status

12. Trap chamber DT-NG furnace EBIT Beam optics 300 magnet 7 m B. Furnace + BeO target 6He • The 14 MeV neutrons hit a hot (1500K) BeO target, as a result , 6He nuclei are produced. • Ordered from HeatWave (USA). (ETA - Winter 2011).Porous BeO 80 mm x 2 mm discs delivered and stored Setup Status

13. Trap chamber DT-NG furnace EBIT Beam optics 300 magnet 7 m C. Accumulator and Buncher • EBIT - DREBIT (Dresden, Germany) • Neutral 6He enter the EBIT, ionized, accumulated and bunched. • Custom made for efficient 6He injection Setup Status

14. Trap chamber DT-NG furnace EBIT Beam optics 300 magnet 7 m D. Trap Chamber • Stable isotopes trapping • Detectors: • MCP’s • Plastic Scintillator with multiple photomultipliers • Electronics – ADC, TDC,… Setup Status

15. Summary Present setup offers significant advantages over other schemes: • Large solid angle for recoils and electrons. • Field-free inner region. • Full reconstruction of the e-ν angle. • Ease-of-operation and portability. • Complementary to other methods (different systematic errors) • “Continuous” operation (no “beam time”…) • Easily adapted for other radioactive species. Sergey Vaintraub

16. Collaborations • Weizmann group • Michael Hass • Oded Heber • Michael Rappaport • Anukul Dhal • Dirk Schwalm • David Melnik • Alexander Prygarin • Soreq (SARAF) group • Tsviki Hirsh • Dan Berkovits • Israel Mardor • MPIK group • Klaus Blaum • Andreas Wolf Thank you! Sergey Vaintraub