INSTITUUT VOOR KERN- EN STRALINGSFYSICA 23-May-2002Weak Interaction Trap for CHarged particles1 Progress of the WITCH project Valentin Kozlov NIPNET meeting,

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Presentation transcript:

INSTITUUT VOOR KERN- EN STRALINGSFYSICA 23-May-2002Weak Interaction Trap for CHarged particles1 Progress of the WITCH project Valentin Kozlov NIPNET meeting, May, Groningen

23-May-2002Weak Interaction Trap for CHarged particles2 WITCH team F. Ames, D. Beck, G. Bollen, J. Deutsch, W. Quint, K.Reisinger and the NIPNET Collaboration M.Beck, B.Delauré, V.Kozlov, A.Lindroth and N.Severijns V.Golovko, I.Kraev, T.Phalet and S.Versyck KO

23-May-2002Weak Interaction Trap for CHarged particles3 Motivation & Principle Standard Model: V-A interaction 95%CL (pure Fermi)  - correlation: ++ e Recoil energy (eV) ++ e Vector Scalar S, a =-1 V, a =1

23-May-2002Weak Interaction Trap for CHarged particles4 Penning Trap Cooler Trap Decay Trap Differential pumping Buffer gas inlet Spectrometer REXTRAP

23-May-2002Weak Interaction Trap for CHarged particles5 Retardation !! probes velocity component parallel to electric field !! conversion of radial into longitudinal kinetic energy necessary retardation counter retardation potential we use “inverse” magnetic mirror: decay trap in 9T –field, retardation in 0.1T field Energy Conversion:

23-May-2002Weak Interaction Trap for CHarged particles6 Experimental set-up REXTRAP Horizontal beam transport 90  bender Pulsed drift tube Cooler trap Decay trap 9T magnet 0.1T magnet Radial into axial motion conversion  -detector Post acceleration Energy analysis by retardation Einzellens Detector (MCP)

23-May-2002Weak Interaction Trap for CHarged particles7 Horizontal beam-line

23-May-2002Weak Interaction Trap for CHarged particles8 The Magnet system

23-May-2002Weak Interaction Trap for CHarged particles9 Magnet homogeneity

23-May-2002Weak Interaction Trap for CHarged particles10 Precision

23-May-2002Weak Interaction Trap for CHarged particles11 WITCH Control system LabVIEW environment Wide variety of measurement devices Easy to start Powerful, built-in measurement analysis Professional support from NI and in CERN Compatibility with ShipTrap Control System Windows NT/2000(?) Best support for LabVIEW Most stable from Windows family Support in CERN Additional modules for LabVIEW ( DSC- Datalogging and Supervisory Control, … )

23-May-2002Weak Interaction Trap for CHarged particles12 LabView programming LabVIEW Panel LabVIEW Diagram

23-May-2002Weak Interaction Trap for CHarged particles13 Current status

23-May-2002Weak Interaction Trap for CHarged particles14 Isolde hall

23-May-2002Weak Interaction Trap for CHarged particles15 Experimental area