WITCH: Status

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WITCH Status Outlook

• A. Lindroth, M. Beck, B. Delaure,
• V. Golovko, V. Kozlov, I. Kraev,
• T. Phalet, N. Severijns,
• S. Versyck

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Contents

• Brief reminder/introduction to WITCH
• Recent developments
• The next 12 months
• Ideas for long-term improvements

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Brief reminder/introduction to WITCH Motivation
Other physics possible

• EC/b

• F/GT

• e- shake-off

• And more ...

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Brief reminder/introduction to WITCH The Set-up
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Recent developments Trap structure!
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Recent developments Vertical Beamline
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Recent developments MCP Ion Source Tests
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Recent developments Crane
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Recent developments other
Control Systembasic version almost ready see
other presentation

• Cabling
• Web readout not quite done yet
• Organization in racks
• spectrometer electrodes top chamber
  designed
• electronic magnet-system readout/control

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The next 12 months
Top chamber electrode structure
Trapping tests ion source and stable rextrap
bunches
Some sort of recoil spectrum
Optimization
Simulations/preparations for long-term
improvements
Fill gaps/expand Ctrl Sys (due to rapid
development)
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Ideas for future improvements Cryogenic Traps
Biggest contribution to response function width
thermal motion in traps!
Well be looking carefully at SHIPTRAP!
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Ideas for future improvements A Tape Station
used in a new way
Since recoil nuclei are counted directly in an
MCP, that detector will be contaminated ? only
decays leading to stable daughters can be studied.
Solution tape station for secondary e-creation
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Summary

• Several developments have been finished recently,
  and few remain as we approach a period of
  systematic tests
• WITCH will be doing systematic trapping tests,
  and possibly get some sort of recoil spectrum
  this radioactive-beam period
• 2004 will show the principle with decent
  precision, the set-up and method will be refined
  and potentially present limits on a will be
  reached
• After 2004, or so, larger upgrades of WITCH might
  be started