N-GRID -monitor n direction @280m-

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N-GRID-monitor n direction _at_280m-

• A. K. Ichikawa

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Motivation
Measuring n direction by n itself is absolutely
important!
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Idea
Make small detectors and put them in grid
positions.
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Event selectionhigh energy or low energy

• Use m energy.
• Measure m range
• Longer than 3m.
• Measure m momentum w/ magnet.