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MAD-MARS Beam Line Builder and Main Injector collimation

MAD-MARS Beam Line Builder and Main Injector collimation. Igor Rakhno Accelerator Physics Department May 24, 2007. Main Injector collimation at slip-stacking injection. There are 8 dipoles and ≈ dozen quads in the 200-m region.

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MAD-MARS Beam Line Builder and Main Injector collimation

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  1. MAD-MARS Beam Line Builder and Main Injector collimation Igor Rakhno Accelerator Physics Department May 24, 2007

  2. Main Injector collimation at slip-stacking injection • There are 8 dipoles and ≈ dozen quads in the 200-m region. • Our goal was to design an appropriate radiation shielding for the region. • There is a primary collimator (thin tungsten plate) and 4 secondary ones (big structures).

  3. Practical observations • For a single dipole it might be makes sense to build the geometry model without MMBLB. • For two dipoles we could still work without MMBLB. • For three dipoles, from now on, I will use MMBLB.

  4. Advantages • If one makes an error in a model when using Non-standard geometry, it would be time-consuming to correct it for a model with 1000 spatial cells. MMBLB reduces the complexity of the entire model to the complexity of a single section. • An output file BL_ELEMENTS gives detailed info on the sections.

  5. Sample of BL_ELEMENTS type name s(cm) length(cm) NNON_min NNON_max DRIFT3 DRIFT0 5.00+00 5.00+00 1 2 Q230 Q230 3.00+02 3.05+02 3 15 …………….. ……………..

  6. Surface water activation

  7. Surface water activation

  8. Surface water activation – Q230 thru Q301

  9. Surface water activation

  10. Surface water activation – S2

  11. Surface water activation – S2

  12. Residual dose – Q230 thru Q301

  13. Residual dose – Q301

  14. Residual dose – Q301 thru Q310

  15. Absorbed dose – trim dipole H232

  16. Absorbed dose – S1

  17. Absorbed dose – S2

  18. Neutron spectra: Q301–S1 (red) and Q308–S1 (black)

  19. Neutron (black) and proton (red) spectra DS S1

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