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N. Simos, BNL

MERIT Experiment On-Going Studies 1 - Target Station Beam Windows 2 - Magneto-dynamic Analysis 3 - Beam-Hg Interaction Analysis. N. Simos, BNL. Anti-vibration Mechanism. Jet Deflector. Primary Containment. Hg Jet. Z=0 Viewport. Secondary Containment. Proton Beam.

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N. Simos, BNL

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  1. MERIT Experiment On-Going Studies1 -Target Station Beam Windows2 - Magneto-dynamic Analysis3 - Beam-Hg Interaction Analysis N. Simos, BNL

  2. Anti-vibration Mechanism Jet Deflector Primary Containment Hg Jet Z=0 Viewport Secondary Containment Proton Beam Baseline Target Assembly Concept

  3. Baseline Target Assembly Concept

  4. Baseline Beam Window Concept

  5. CONCERNS realized in E951 experiment and applicable to MERIT as well Figure above depicts the tight beam spot requirement (0.5 x 0.5 mm rms) for target experiment at AGS Induced shock stress in a window structure by 16 TP intensity beam and the spot above will likely fail most materials in a single short pulse ( ~ 2 ns) MERIT Experiment Issues with SSTL Windows

  6. Ti-6Al-6V tested as beam window with the24 GeV AGS Beam (3.5 TP)

  7. Beam Window Study on T-6Al-4V and Thickness Requirement

  8. 3D Beam Window Study that include Hg in the Baffle Hg Beam Window inside Hg/beam interaction volume Volume of Hg in baffle experiencing pressure from beam interacting with entrance window

  9. Hg Jet

  10. Hg pressure-induced effects on Jet Nozzle

  11. OTHER ON-GOING Studies: • Beam-induced Hg jet destruction • LS-DYNA analysis with Eulerian-Lagrancian formulation to account for • fluids and solids in the same analysis. Goal is to, hopefully, benchmark a • simulation of the event with the test data. The benefit will be a clear • understanding of how quickly the jet destructs that will in turn provide • information as to how close the pulses in the real muon collider can be stacked

  12. Preliminary Hg splash analysis induced by beam

  13. Preliminary Hg/beam interaction analysis – NO Field Figure shows the zeroing of Hg density within the jet

  14. Snapshots of stresses in the outer vessel generated by splashed Hg 200 micro-secs 140 micro-secs

  15. OTHER ON-GOING Studies: Eddy currents and magnetic forces in the Hg volume just prior to jetting out into the target/beam interaction volume with 15 Tesla field present. Based on ANSYS magneto-dynamic analysis looking to assess the forces the jet must overcome as it tries to come out of the nozzle

  16. Conducting Volume (Hg) used in analysis. Air, steel and Ti not shown. Uniform 15 Tesla magnetic field is imposed Hg in baffle Hg Supply Hg in nozzle

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