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Beam Parameter Study (2)

Beam Parameter Study (2). Timothy Carlisle University of Oxford. Intro. Initial results presented in Analysis Meeting 26/1/10 Studying MICE sensitivity to input beam parameters. Data Selection. All simulations use: 5000 events, Step VI geometry + B-field map 50 virtual planes

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Beam Parameter Study (2)

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  1. Beam Parameter Study (2) Timothy Carlisle University of Oxford

  2. Intro • Initial results presented in Analysis Meeting 26/1/10 • Studying MICE sensitivity to input beam parameters

  3. Data Selection • All simulations use: • 5000 events, Step VI geometry + B-field map • 50 virtual planes • All emittance calculations use: • Muons that survive the channel • Fixed Cuts: • AmpSq > 135 mm - Tracker acceptance • AmpL > 0.3 ns – lost from bunch • 16*AmpSq & 8*AmpL cuts Remove outlying events

  4. Step VI Performance (sPz) • Cooling strongly dependent on initial sPz • At ei=3mm: • 10% cooling at 1 MeV/c • 5% heating at 20 MeV/c

  5. Step VI Performance (RF) Step V MICE note 265: Effect of Reduced RF Gradient on MICE Cooling Performance C. Rogers

  6. Beta Function

  7. Av. Energy(z)

  8. Beta Function Problem • ~ 33cm in tracker BUT: • Minima not located at absorbers (±2.75m,0m) • 42cm at LH2 • Expect peaks of ~ 110cm Simulation set-up?

  9. Conclusions • MICE performance appears sensitive to • RF Gradient – ~ agrees with Chris (note 265) • Initial sPz • Important departure from behaviour expected by the [idealised] cooling equation. • What can we consider a standard/reasonable output beam from the Beamline?

  10. TRD Beta Fn. Red – ICOOL, Blue – predicted from evolution equations

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