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GQM v6

Agnieszka Priebe. GQM v6. CERN BE-BI-BL. Student Meeting. 26 th December 2012. Geanto - Quencho -Meter. ROOT program for Quench Test analysis Geant4 simulations compared to experimental data Experimental data: directly loaded from LD base

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GQM v6

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  1. AgnieszkaPriebe GQMv6 CERN BE-BI-BL Student Meeting 26thDecember 2012

  2. Geanto-Quencho-Meter • ROOT program for Quench Test analysis • Geant4 simulations compared to experimental data • Experimental data: directly loaded from LD base • Geant4 data: 71 point-like losses weighted by coefficients • Tasks: • Validating the assumed loss pattern • Edep distribution in the SC coils, secondary particles distribution in BLMs, BLM signals • Options: • Symmetrical Gaussian loss shape (free parameters: μ, σ) • Asymmetrical Gaussian loss shape (free parameters: μ, σright, σleft) • Loss shape loaded from a file • Loss shape from Aperture Meter (to be implemented again) AgnieszkaPriebe 26thDecember 2012 Student Meeting

  3. Geanto-Quencho-Meter • ROOT program for Quench Test analysis • Geant4 simulations compared to experimental data • Experimental data: directly loaded from LD base • Geant4 data: 71 point-like losses weighted by coefficients • Tasks: • Validating the assumed loss pattern • Edep distribution in the SC coils, secondary particles distribution in BLMs, BLM signals • Options: • Symmetrical Gaussian loss shape (free parameters: μ, σ) • Asymmetrical Gaussian loss shape (free parameters: μ, σright, σleft) • Loss shape loaded from a file • Loss shape from Aperture Meter (to be implemented again) Program re-written, no problems with files any more Memory problems for 1.6·106 iterations ? AgnieszkaPriebe 26thDecember 2012 Student Meeting

  4. GQM: correlation coefficients • Error factor • Looking for: minimum • Linear coefficient factor • Looking for: maximum (value the closer to 1) AgnieszkaPriebe 26thDecember 2012 Student Meeting

  5. GQM: loss pattern optimization • Loss pattern- symmetric Gaussian: μ = 0 m, σright= 1.77 m, σleft= 1.77 m • Maximum of secondary particles in the interconnection region • Maximum of Edep close to the end of MQ AgnieszkaPriebe 26thDecember 2012 Student Meeting

  6. GQM: loss pattern optimization • Loss pattern- asymmetric Gaussian: μ = 0 m, σright= 1.77 m, σleft= 1.10 m • Maximum of secondary particles in the interconnection region • Maximum of Edep close to the endgof MQ AgnieszkaPriebe 26thDecember 2012 Student Meeting

  7. GQM: loss pattern from fluka • Loss pattern from Anton Lechner – with magnetic field • Maximum of secondary particles in the centre ofMQ • Maximum of Edep close to the beginning of MQ Geant4 simulations: Energy: 3.5 TeV Angle 202 μrad Fluka simulations: Energy: 4 TeV Angle 200 μrad AgnieszkaPriebe 26thDecember 2012 Student Meeting

  8. GQM: loss pattern from fluka • Loss pattern from Anton Lechner – without magnetic field • Maximum of secondary particles in the centre ofMQ • Maximum of Edep close to the beginning of MQ Geant4 simulations: Energy: 3.5 TeV Angle 202 μrad Fluka simulations: Energy: 4 TeV Angle 200 μrad AgnieszkaPriebe 26thDecember 2012 Student Meeting

  9. GQM: optimized loss pattern • Loss pattern optimized in three dimensional space (asymmetrical) • Maximum of secondary particles in the interconnection region • Maximum of Edep close to the end of MQ Δσ = 10% (from 0.5 to 4) Δμ = 0.1 mfrom (-1 to 1, after initial optimization with larger steps) AgnieszkaPriebe 26thDecember 2012 Student Meeting

  10. GQM: optimized loss pattern For μ = 0.4 m(min of Σ) • Loss pattern optimized in three dimensional space (asymmetrical) AgnieszkaPriebe 26thDecember 2012 Student Meeting

  11. GQM: optimized loss pattern • Loss pattern optimized in three dimensional space (asymmetrical) More sensitive AgnieszkaPriebe 26thDecember 2012 Student Meeting

  12. GQM: optimized loss pattern • Loss pattern optimized in two dimensional space (symmetrical) • Maximum of secondary particles in the interconnection region • Maximum of Edep close to the end of MQ Δσ = 10% (from 0.5 to 4) Δμ = 0.1 mfrom (-1 to 1, after initial optimization with larger steps) AgnieszkaPriebe 26thDecember 2012 Student Meeting

  13. GQM: optimized loss pattern • Loss pattern optimized in two dimensional space (symmetrical) For μ = 0.5 m(min of Σ) AgnieszkaPriebe 26thDecember 2012 Student Meeting

  14. GQM summary • A tool for estimations the loss patterns • Two criteria of determination the agreement between Geant4simulations and experimental data • Minimum Σ is used are the most important factor • Since Geant4 simulations are time-independedent , they can be used for various loss duration scenarios • Integrated loss over 6s is considered, no time evolution involved AgnieszkaPriebe 26thDecember 2012 Student Meeting

  15. Thank you for you attention ! Questions? Comments? Remarks? AgnieszkaPriebe 26thDecember 2012 Student Meeting

  16. GQM: loss pattern optimization • Loss pattern- symmetric Gaussian: μ = 0 m, σright= 1.6 m, σleft= 1.6 m • Maximum of secondary particles in the centre ofMQ • Maximum of Edep close to the beginning of MQ Geant4 simulations: Energy: 3.5 TeV Angle 202 μrad Fluka simulations: Energy: 4 TeV Angle 200 μrad AgnieszkaPriebe 26thDecember 2012 Student Meeting

  17. GQM: loss pattern from fluka • Loss pattern from Anton Lechner – with magnetic field • Maximum of secondary particles in the centre ofMQ • Maximum of Edep close to the beginning of MQ Geant4 simulations: Energy: 3.5 TeV Angle 202 μrad Fluka simulations: Energy: 4 TeV Angle 200 μrad AgnieszkaPriebe 26thDecember 2012 Student Meeting

  18. GQM: loss pattern from fluka • Loss pattern from Anton Lechner – without magnetic field • Maximum of secondary particles in the interconnection region • Maximum of Edep close to the end of MQ Geant4 simulations: Energy: 3.5 TeV Angle 202 μrad Fluka simulations: Energy: 4 TeV Angle 200 μrad AgnieszkaPriebe 26thDecember 2012 Student Meeting

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