{ Precision measurements of the beta neutrino correlation in the WI Electrostatic Ion Trap 3 December 2012 Sergey Vaintraub

2 Where to search for beyond SM Physics? Sergey Vaintraub 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

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

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

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

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

7 Electrons detector MCP Entrance mirror Exit mirror Some of 6 Li ions will go though MCP hole 6 Li ++ e-e- -  e and are in opposite directions, hence momentum of recoiling 6 Li is small. 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

Present Setup

DT-NGfurnace 30 0 magnet EBITBeam optics 7 m Trap chamber Setup Status A. Neutron Generator DT-NG D + T → n + 4 He E n = 14.2 MeV, Production rate~10 10 n/s Ordered from VNIIA (Russia).

DT-NGfurnace 30 0 magnet EBITBeam optics 7 m Trap chamber Setup Status B. Furnace + BeO target The 14 MeV neutrons hit a hot (1500K) BeO target, as a result, 6 He nuclei are produced. Ordered from HeatWave (USA). (ETA - Winter 2011).Porous BeO 80 mm x 2 mm discs delivered and stored 6 He

DT-NGfurnace 30 0 magnet EBITBeam optics 7 m Trap chamber Setup Status C. Accumulator and Buncher EBIT - DREBIT (Dresden, Germany) Neutral 6 He enter the EBIT, ionized, accumulated and bunched. Custom made for efficient 6 He injection

DT-NGfurnace 30 0 magnet EBITBeam optics 7 m Trap chamber Setup Status D. Trap Chamber Stable isotopes trapping Detectors: MCP’s Plastic Scintillator with multiple photomultipliers Electronics – ADC, TDC,…

15 Summary Sergey Vaintraub 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.

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 Sergey Vaintraub

Production of Radioisotopes

Trap Chamber