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Simulating Dark Matter Detectors (a.k.a. DMX Underground Advanced Example)

Dark Matter detectors Implementation within Geant4 Running DMX advanced example Output – AIDA and PI Conclusions. Simulating Dark Matter Detectors (a.k.a. DMX Underground Advanced Example). UKDMC Experiment. DMX. ( Dark Matter eXperiment ). underground physics advanced example.

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Simulating Dark Matter Detectors (a.k.a. DMX Underground Advanced Example)

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  1. Dark Matter detectors Implementation within Geant4 Running DMX advanced example Output – AIDA and PI Conclusions Simulating Dark Matter Detectors(a.k.a. DMX Underground Advanced Example) Alex Howard, CERNSlide 1

  2. UKDMC Experiment Alex Howard, CERNSlide 2

  3. DMX ( Dark Matter eXperiment ) underground physics advanced example Developed from Last Year’s Workshop Project Alex Howard, CERNSlide 3

  4. The DMX advanced example • The Dark Matter eXample was released with Geant 4.4.0 and updated with release 4.4.1 (geometry, analysis) • Gives example of Dark Matter type experiment with a scintillator target (LXe), low energy physics interactions, ray tracing of scintillation of photons and time constants introduced to demonstrate discrimination Alex Howard, CERNSlide 4

  5. User Example Class Diagram Alex Howard, CERNSlide 5

  6. DMX Class Diagram Alex Howard, CERNSlide 6

  7. Alex Howard, CERNSlide 7

  8. To full construction: Internal Structure Alex Howard, CERNSlide 8

  9. Laboratory Geometry Implementation Alex Howard, CERNSlide 9

  10. Laboratory Geometry Implementation Alex Howard, CERNSlide 10

  11. detector world detector detail source Alex Howard, CERNSlide 11

  12. Ray Tracing mirror GXe LXe source PMT Alex Howard, CERNSlide 12

  13. hits Evt Etot LXe LXeTime PMT PmtTime First Flags # MeV hits ns hits ns hit 0 0.0600 104 0.00057 48 35.98 gamma gamma electron 2 0.0308 121 4.8e-06 37 52.21 gamma gamma electron 3 3.9547 4538 2.7e+17 1733 19.55 alpha electron other 4 5.2674 7521 8.1e-05 11356 21.83 alpha electron other 5 0.0860 204 1.3e-3 84 16.93 Xe129[0.0] other Alex Howard, CERNSlide 13

  14. PhysicsList transportation user cuts: step, time optical “selective” scintillation electromagnetic low energy models neutronHP models hadronic decay radioactive decay Alex Howard, CERNSlide 14

  15. other features PrimGenAction particle gun RunAction EventAction output for analysis SteppingAction colour tracks StackingAction kill particles for speed analysis AIDA and PI Alex Howard, CERNSlide 15

  16. Am241 source g (59.5 keV) a (5.49 MeV) Am241 Np237 (92.7 keV) Alex Howard, CERNSlide 16

  17. g upwards through Xe shell Pb compton Alex Howard, CERNSlide 17

  18. n room elastic inelastic outside Alex Howard, CERNSlide 18

  19. 241Am spectrum experimental Alex Howard, CERNSlide 19

  20. g spectrum experimental Alex Howard, CERNSlide 20

  21. Time Constant Discrimination Experimental Data Geant4 Output • Red Curve = Alphas • Blue Curve = Gammas Alex Howard, CERNSlide 21

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