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Predicting PEP-II Accelerator induced backgrounds with LPTURTLE

Predicting PEP-II Accelerator induced backgrounds with LPTURTLE. TPPP023. Roger Barlow – Manchester and Cockcroft Witold Kozanecki – CEA/DSM/DAPNIA Patrick Roudeau & Achille Stocchi – LAL Ted Fieguth – SLAC Stephanie Majewski - Stanford. Collimators. PEP-II Regions Map. LER. HER. LER.

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Predicting PEP-II Accelerator induced backgrounds with LPTURTLE

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  1. Predicting PEP-II Accelerator induced backgrounds with LPTURTLE TPPP023

  2. Roger Barlow – Manchester and Cockcroft Witold Kozanecki – CEA/DSM/DAPNIA Patrick Roudeau & Achille Stocchi – LAL Ted Fieguth – SLAC Stephanie Majewski - Stanford

  3. Collimators

  4. PEP-II Regions Map LER HER

  5. LER

  6. Collimator Studies Gray dots hit the ring harmlessly. Black dots hit the ring near the IP Gap in the middle survive

  7. Tightening the far collimators and moving the upstream collimator downstream will minimize background

  8. The ones that hurt

  9. Radiative Bhabhas MC from Burkhardt and Kleiss

  10. Dose is all in horiz plane

  11. Beam Gas: Coulomb and Bremsstrahlung Need for importance sampling in the simulation to avoid poles and inefficiency Regions in z and 

  12. Where do they come from? Regions

  13. Z and azimuth for HER and LER

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