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Neutrino Physics with Penning Traps at MPI-K

Neutrino Physics with Penning Traps at MPI-K. Sergey Eliseev Group of Prof. K. Blaum “Trapped and Cooled Ions“ MPI-K, Heidelberg. SFB-Meeting, 9.07.2009. B. q / m. f z. Confinement Volume D<10 m m. f +. end cap. very precise measurements of f c are possible. f -. ring

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Neutrino Physics with Penning Traps at MPI-K

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  1. Neutrino Physics with Penning Traps at MPI-K Sergey Eliseev Group of Prof. K. Blaum “Trapped and Cooled Ions“ MPI-K, Heidelberg SFB-Meeting, 9.07.2009

  2. B q/m fz Confinement Volume D<10 mm f+ end cap very precise measurements of fc are possible f- ring electrode - invariance theorem Principle of Penning trap mass spectrometry Cyclotron frequency: Sergey Eliseev , SFB-Meeting, 9.07.2009

  3. Detection techniques Narrow-band FT-ICR 4.2 K Q ~ 15 000; voltage noise ~ 700 pV/Hz1/2 current noise ~ 3fA/Hz1/2 High-precision mass measurements Dm/m < 10-11 Single ion sensitivity Sergey Eliseev , SFB-Meeting, 9.07.2009

  4. Determination of Type of neutrino: neutrino & anti-neutrino mass Majorana or Dirac Determination of …………………… mixing angle Q13 Penning Traps: Q-value of a decay (Q=Mi-Mk) with an accuracy up to 10-11 Sergey Eliseev , SFB-Meeting, 9.07.2009

  5. Mass of neutrino & anti-neutrino 163Ho 35S 37Ar & 22Na 163Ho 3H 163Ho 193Pt 3H 3H 187Re 3H 3H 3H Sergey Eliseev , SFB-Meeting, 9.07.2009

  6. Mass of anti-neutrino: 3T 3He -decay KATRIN aims for mn < 0.2 eV VanDyck 2 2 SMILETRAP (DQ=1.2 eV) Independent measurement of Q-value of 3T-decay: • gives a check on systematic errors • can remove a free parameter from KATRIN data analysis Sergey Eliseev , SFB-Meeting, 9.07.2009

  7. 04.06.2009 12C4+ … in new lab Nr.1 (THe) at MPI-K We aim for dQ (3T → 3He) =20 meV (dm/m)= 7·10-12 Dr. David Pinegar et al. ±0.1 K Laboratory • Temperature stabilization: 0.1K/day • Pressure stabilization • Vibration ‘free‘ floor: <0.1 mm • Screening from E-fields: Al-walls • Active compensation of B-fields: Helmholtz coils Magnet • 6 Tesla • 4.2 K-bore magnet • Magnetic field stability: DB/B < 17 ppt/h Vibration ‘free‘ floor; Dx < 0.1 mm Sergey Eliseev , SFB-Meeting, 9.07.2009

  8. Performance: Resolving Power: ~104 Sensetivity: <1000 ions A Broad-Band FT-ICR Penning Trap System for KATRIN M. Ubieto-Díaz et al. • Formation of ion clusters (3T2n+1)+, which decay with • different end point than 3T2 • Presence of other species (contaminants) Sergey Eliseev , SFB-Meeting, 9.07.2009

  9. neutrino is monoenergetic !!! Qn can be as small as ~ 0.5 keV Qn = En + mnc2 = QEC – Bi Qn smaller Qn→ higher contribution of mn QEC Bi (QEC – Bi) should be as small as possible QEC should be as small as possible Mass of Neutrino Atomic Orbital Electron Capture (Z,A) + e (Z-1,A)h + Qn (Z-1,A)g + Bi (Z,A) (Z-1,A)h (Z-1,A)g Sergey Eliseev , SFB-Meeting, 9.07.2009

  10. Yes ! • to confirm the results taken from tritium measurements • (with completely different systematic uncertainties) • hopefully can be useful for a check of CPT-conservation • for neutrinos Mass of Neutrino Do we need to measure the neutrinomass since the antineutrinomass limit is known? Sergey Eliseev , SFB-Meeting, 9.07.2009

  11. Mass of Neutrino: electron-capture in 163Ho 163Ho 163Dyh + ne (En) analysis of calorimetric spectrum mn 163Dy + Ec Sergey Eliseev , SFB-Meeting, 9.07.2009

  12. Cryogenic m-calorimeters (Group of Prof. Enss, KIP, Uni Heidelberg) end point with accuracy ~ 1 eV PENTATRAP (Group of Prof.K. Blaum, MPI-K, HD) mn ~ 1 eV QEC-valuewith accuracy ~ 1 eV Mass of Neutrino: electron-capture in 163Ho Typical m-calorimetric de-excitation spectrum of EC in 163Ho QEC mn Sergey Eliseev , SFB-Meeting, 9.07.2009

  13. … in new lab Nr.2 (PENTATRAP) at MPI-K We aim for dQ (163Ho → 163Dy) ≈1 eV; (dm/m) < 10-11 Existing Penning Traps PENTATRAP • stable nuclides • light masses • closed systems • radiactive, highly charged nuclides • masses up to Uranium • open system Improvement of accuracy by more than one order of magnitude !!! Sergey Eliseev , SFB-Meeting, 9.07.2009

  14. … in new lab Nr.2 (PENTATRAP) at MPI-K Accelerator Hall of MPI-K (Heidelberg) EBIT 3He,4He ion source EBIT ion source highly charged ions • Temperature stabilization: 0.1K/day • Pressure stabilization • Damping of vibrations: <1 mm (active & passive) • Screening from E-fields: Al-walls • Active compensation of B-fields: Helmholtz coils ~3.4 meters PENTATRAP Lab (basement) Sergey Eliseev , SFB-Meeting, 9.07.2009

  15. … in new lab Nr.2 (PENTATRAP) at MPI-K Magnet Magnet Insert Tower of five traps Sergey Eliseev , SFB-Meeting, 9.07.2009 Accuracy of mass measurements < 10-11

  16. … in new lab Nr.2 (PENTATRAP) at MPI-K monitoring of B-Field flactuations over the measurement cycle Monitor trap reduction of systematics due to temporal B-field flactuations Preparation trap storage/cooling of reference ion / ion of interest Precision trap 112.2mm substantial reduction of cycle time Preparation trap high precision mass measurements accuracy ~10-11; eV-level Monitor trap Sergey Eliseev , SFB-Meeting, 9.07.2009 Accuracy of mass measurements < 10-11

  17. T1/2=444 y 80.725 K 0+ 194Hg Qε=(69±14) keV En=(-12±14) keV 1- 194Au T1/2=50 ky 0+ 202Pb En≈(-35±15) keV Qε=(50±15) keV 15.35 L1 2- 202Tl Mass of Neutrino: search for new candidates Proposal IS473 to the ISOLDE Committee, CERN (2008) “SEARCH FOR NEW CANDIDATES FOR THE NEUTRINO-ORIENTED MASS DETERMINATION BY ELECTRON-CAPTURE“ Yu. Novikov, K. Blaum, S. Eliseev et Al. being analyzed Sergey Eliseev , SFB-Meeting, 9.07.2009

  18. Determination of Type of neutrino: neutrino & anti-neutrino mass Majorana or Dirac Determination of …………………… mixing angle Q13 Penning Traps: Q-value of a decay with an accuracy up to 10-11 Sergey Eliseev , SFB-Meeting, 9.07.2009

  19. Type of Neutrino: Majorana or Dirac neutrinoless double beta decay neutrinoless double EC decay Sergey Eliseev , SFB-Meeting, 9.07.2009

  20. Г εε Bi(2) Qεε Bj(1) (Z-1,A) (Z-2,A) (Z,A) Resonant n-less double EC decay Sergey Eliseev , SFB-Meeting, 9.07.2009

  21. Candidates for resonant neutrinoless double-capture Starting Project for PENTATRAP !!! Sergey Eliseev , SFB-Meeting, 9.07.2009

  22. Determination of Type of neutrino: neutrino & anti-neutrino mass Majorana or Dirac Determination of …………………… mixing angle Q13 Penning Traps: Q-value of a decay with an accuracy up to 10-11 Sergey Eliseev , SFB-Meeting, 9.07.2009

  23. Proposal NeOs Y.N. Novikov, A. Vasiljev, Y. Giomataris, S. Eliseev & J.D. Vergados 10 meters Liquid Argon EC-Nuclide source of monoenergeticne L32 Neutrino oscillation length L32 & mixing angle Q13 Probability of electron-neutrino ne disappearance Sergey Eliseev , SFB-Meeting, 9.07.2009

  24. Neutrino oscillation length L32 & mixing angle Q13 Possible candidates for the neutrino source Sergey Eliseev , SFB-Meeting, 9.07.2009

  25. 1 meter Micromegas LAr Ar-gas e e e V Challenge Detection of 10 keV recoil electrons Porous shell Neutrino oscillation length L32 & mixing angle Q13 Neutrino source: 10 meters 100 kg of natPt contains 0.1 kg of 193Pt after 1 year of irradiation at a reactor Liquid Argon Count rate: natPt ne – flux from 0.1 kg of 193Pt: ~ 2·1014 1/s number of ne – e interactions: ~ 100 events/year Sergey Eliseev , SFB-Meeting, 9.07.2009

  26. Summary Penning traps can have a significant contribution to the neutrino physics • At MPI-K two Penning trap mass spectrometers are set up • to assist the KATRIN – experiment (determination of mn-) • We are reviving the neutrino physics in the EC – sector by • contributing to determination of neutrino mass • (PENTATRAP;163Ho) • determination of mixing angle Q32 (PENTATRAP;NeOs; 193Pt) • contributing to neutrinoless double EC decay (type of the neutrino) Sergey Eliseev , SFB-Meeting, 9.07.2009

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