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Contribution of Penning trap mass spectrometry to neutrino physics

Contribution of Penning trap mass spectrometry to neutrino physics. Szilárd Nagy MPI-K Heidelberg, Germany. Outline. Introduction Techniques in high-precision Penning trap mass spectrometry Results related to neutrino physics Outlook .

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Contribution of Penning trap mass spectrometry to neutrino physics

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  1. Contribution of Penning trap mass spectrometry to neutrino physics Szilárd NagyMPI-K Heidelberg, Germany New Instruments for Neutrino Relics and Mass, CERN, 8-Dec-2008

  2. Outline • Introduction • Techniques in high-precision Penning trap mass spectrometry • Results related to neutrino physics • Outlook If m=100kg and m=0.1kg, Rel. Precision m/m =0.001 =10-3

  3. Mass: fundamental information for fundamental physics E= mc2 : Is Einstein right?How much is really 1kg?Where does QED theory fail?Is there physics beyond the Standard Model ?What is the rest mass of a neutrino?

  4. Penning trap PENNING trap: Combination of a strong homogeneous magnetic field and weak electric quadrupole field νz ν+ ν- Cyclotron frequency:

  5. Destructive and non-destructive detection 7 T 0 TOF-ICR radial energy  axial energy G. Gräff et. al Z. Phys. 297 35 (1980) Narrow-band FT-ICR 4.2 K

  6. Penning trap mass spectrometer facilities worldwide (K. Blaum Phys. Rep.425, 1-78 (2006) under construction facilities using HCI

  7. Stockholm-Mainz-Ion LEvitation-TRAP 0-2 ions ~2000 ions 20pC 500 pC 50nC I. Bergström et al. NIM A 487, 618 (2002)

  8. Why to use highly-charged ions for mass measurements? In the case of 238U 92 Xhigher resolving power can be achieved by using q=92+ ions.

  9. On the Q-value of the 76Ge ββ -decay Not allowed by SM Manitoba SMILETRAP Ramsey 2006 SMILETRAP 2001 Manitoba 2 Q=2039.006(46) keV G. Douysset Phys. Rev. Lett. 86, 4259 (2001) M. Suhonen et al. JINST 2 P06003 (2007)

  10. The Q-value of the 136Xe ββ -decay E. G. Myers et al. formerly D. Pritchard MIT m(136Xe)=135.907 214 484 (11) u 8x10-11 improvement by factor 380x m(136Xe) –m(136Ba)=2457.83(37) keV M. Redshaw et al., Phys. Rev. Lett. 98, 053003 (2007)

  11. The Q-value of the Tritium β-decay ■ If electron neutrinos had a nonzero mass, the maximum electron energy would be lower, and the shape of the spectrum different ■ KATRIN will examine the shape of thetritium β spectrum at the highest energies.

  12. Q-value of 3H β-decay Stockholm Seattle Stockholm value: Q=18 589.8 eV Uncertainty:1.2 eV Sz. Nagy et al. Europhys. Lett., 74, 404 (2006)

  13. Mass measurement of 3He and 3H

  14. Outlook

  15. VanDyckPTMS@Heidelberg UW-PTMS is relocated to MPI-K Heidelberg and is being built up in a new tritium-proof laboratory within the group of K. Blaum

  16. The layout of the PENTATRAP in Heidelberg HCI from Heidelberg EBIT B=7 T T=4.2K P=10-13mbar dB/B<10-7/cm3 (dB/dt)·(1/B)<10-10/h • Merge into one novel setup: • HCI+Cooling+cryogenic trap+FT-ICR+ external ion injection • Shielded room • External ion injections • Cryogenic temperatures • No ion-ion interaction • Short measurement cycle • Continuous B-field monitoring/ calibration ~10 mm Monitor trap 1 77 K Preparation trap 1 ~118 mm 20 K Measurement trap Preparation trap 2 Monitor trap 2 4.2 K Aimed precision is 10-12 K. Blaum et. al

  17. TRIGA-SPEC: TRIGA-TRAP and TRIGA-LASER separator magnet TRIGA Port B ECRion source Gas jet Cs133C-cluster source W. Nörtershäuser et al Penning traps TRIGA Mainz TRIGA-Laser 7 T detection systems 1m K. Blaum et al

  18. TRIGA-TRAP is operational

  19. 38Ca (T1/2 = 440ms) Reaction Q PTMS Mass Spectrographs ion cloud RF Spectrometers single ion Smith Dehmelt, Gräff, van Dyck, Werth, Kluge Masses must be measured with a clock! Summary 2009: 3H Q-value in Heidelberg with 30 meV precision

  20. Acknowledgements! K. Blaum group @MPI-K R. Schuch I. Bergström T. Fritioff @Smiletrap2 THANK YOU!

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