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WITCH: Physics goals and Present Status

WITCH: Physics goals and Present Status. Valentin Kozlov. FANTOM study week, 13-17 May, Paris. KO. Axel, Bavo, Marcus, Nathal and Valentin. Il’ya, Stefan, Titia and Victor. F. Ames, D. Beck, G. Bollen, J. Deutsch, J. Dilling, O. Forstner, W. Quint, and the NIPNET Collaboration.

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WITCH: Physics goals and Present Status

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  1. WITCH:Physics goals and Present Status Valentin Kozlov FANTOM study week, 13-17 May, Paris Weak Interaction Trap for CHarged particles

  2. KO Axel, Bavo, Marcus, Nathal and Valentin Il’ya, Stefan, Titia and Victor F. Ames, D. Beck, G. Bollen, J. Deutsch, J. Dilling, O. Forstner, W. Quint, and the NIPNET Collaboration Outside world WITCH team Weak Interaction Trap for CHarged particles

  3. Overview 2. Principle of experiment 1. Physics motivation 3. Experimental set-up 5.Current status 4. Expected results Weak Interaction Trap for CHarged particles

  4. e+ nucleus q ne Weak Interactions: Standard Model: V-A interaction 95%CL Physics motivation -correlation: pure Fermi decay Weak Interaction Trap for CHarged particles

  5. b+ ne 1 b+ 0.8 0.6 0.4 ne 0.2 200 500 400 100 300 0 Recoil energy (eV) WITCH principle Vector Scalar Recoil energy ! Vector Scalar Recoil energy spectrum (eV) Weak Interaction Trap for CHarged particles

  6. Radial confinement by the homogeneous magnetic field Axial confinement by an electrostatic quadrupole field Ion motion in Penning trap: Penning trap Weak Interaction Trap for CHarged particles

  7. retardation counter retardation potential conversion of radial into longitudinal kinetic energy necessary decay trap in 9T –field Retardation in 0.1T field Magnetic field gradient Retardation !! probes velocity componentparallel to electric field !! Weak Interaction Trap for CHarged particles

  8. cooler trap decay trap retardation electrodes detector post-acceleration High field Magnet (9T) -detector einzellens Low field Magnet (0.1T) Energy conversion Experimental set-up Weak Interaction Trap for CHarged particles

  9. Charged states It is possible to measure the charged state distribution! Weak Interaction Trap for CHarged particles

  10. Spectrum Weak Interaction Trap for CHarged particles

  11. Precision 105 107 Weak Interaction Trap for CHarged particles

  12. Decision making & design study Control system creating Calculations and simulations Installation horiz. beamline Inst. Platforms + support Inst. Last part Commissioning First test exp. Current status 1998 1999 2000 2001 2002 2003 Weak Interaction Trap for CHarged particles

  13. Magnet system Magnet system Support structure Vertical beamline Photo gallery Weak Interaction Trap for CHarged particles

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