Comparison of Shielding Effectiveness for Various Materials in Particle Physics
This content provides a detailed comparison of shielding effectiveness for different materials such as lead, aluminum, and polyethylene in managing energetic particles like neutrons. It discusses the impact of various shielding configurations on particle flux reduction at critical locations near dump and cryomodule setups. The data presented sheds light on the efficiency of shielding materials in minimizing radiation exposure and maintaining safety in high-energy physics experiments.
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Presentation Transcript
Compare shielding effectiveness E = (0.015 7) MeV 7.5 cm Lead 2.5 cm Al 2.5 cm Polyethlyene + 1 cm Lead En = (2x10-8 15) MeV DarkLight CM Stony Brook Univ M. Hasinoff, UBC 1 2025-02-18
Inside 7.5 cm Lead House Nov 7/22 E = 29.2 MeV Power = 1.4 kW Near Dump n-flux ~ 4 x 101 n/cm2s/kW -flux ~ 5.6 x 103 /cm2s/kW Near Cryomodule n-flux ~ 0.3 x 101 n/cm2s/kW -flux ~ 0.8 x 103 /cm2s/kW SUMMARY n N_dump = 13 x N_cryo N_dump = 7 x N_cryo 2025-02-18 DarkLight CM Stony Brook Univ M. Hasinoff, UBC 2
Oct 7/22 E = 29.8 MeV 2.5cm Al shielding Power ~ 1.7 kW DF ~ 10 % D-875 inside n-flux ~ 8.8 x 101 n/cm2s/kW -flux ~ 5.9 x 104 /cm2s/kW D-870 outside n-flux ~ 2.6 x 102 n/cm2s/kW -flux ~ 1.8 x 105 /cm2s/kW D870/D875 n-flux ~3.0 -flux ~3.3 DarkLight CM Stony Brook Univ M. Hasinoff, UBC 3 2025-02-18
Oct 7/22 E = 29.8 MeV 2.5cm Al shielding Power ~ 1.7 kW DF ~ 10 % D-875 inside n-flux ~ 8.8 x 101 n/cm2s/kW -flux ~ 5.9 x 104 /cm2s/kW D-870 outside n-flux ~ 2.6 x 102 n/cm2s/kW -flux ~ 1.8 x 105 /cm2s/kW D870/D875 n-flux ~3.0 -flux ~3.3 DarkLight CM Stony Brook Univ M. Hasinoff, UBC 4 2025-02-18
2.5cm Polyethylene/1.0 cm Pb Nov 18/22 E = 30.0 MeV Power = 1.1 kW DF 10-15% Both Near Dump Unshielded -- placed in front n-flux ~ 4.0 x 103 n/cm2s/kW -flux ~ 2.5 x 105 /cm2s/kW Shielded -- placed behind n-flux ~ 0.2 x 103 n/cm2s/kW -flux ~ 0.9 x 105 /cm2s/kW SUMMARY n N_unsh = 20 x N_sh N_unsh = 3 x N_sh 2025-02-18 DarkLight CM Stony Brook Univ M. Hasinoff, UBC 5
Compare Dump & Cryomodule locations near Cryomodule near Dump DarkLight CM Stony Brook Univ M. Hasinoff, UBC 6 2025-02-18
Oct 13/22 E = 29.8 MeV Unshielded Power ~ 1.5 kW DF ~ 10 % D-870 near Dump n-flux ~ 5.3 x 102 n/cm2s/kW -flux ~ 3.5 x 105 /cm2s/kW Note ~10 min time shift D-875 near Cryomodule n-flux ~ 0.3 x 102 n/cm2s/kW -flux ~ 0.2 x 105 /cm2s/kW Summary n N_dump = 18 x N_cryo N_dump = 18 x N_cryo DarkLight CM Stony Brook Univ M. Hasinoff, UBC 7 2025-02-18
Oct 14/22 E = 29.8 MeV Unshielded Power ~ 1.5 kW DF ~ 10 % D-870 near Dump n-flux ~ 5.3 x 102 n/cm2s/kW -flux ~ 2.7 x 105 /cm2s/kW Note ~10 min time shift Note ~10 min time shift D-875 near Cryomodule n-flux ~ 0.3 x 102 n/cm2s/kW -flux ~ 0.16 x 105 /cm2s/kW Summary n N_dump = 18 x N_cryo N_dump = 17 x N_cryo DarkLight CM Stony Brook Univ M. Hasinoff, UBC 8 2025-02-18
Oct 20/22 No Shielding E = 29.9 MeV Power ~ 6.0 kW DF ~ 60 % D-870 near dump n-flux ~ 3.3 x 102 n/cm2s/kW -flux ~ 1.0 x 105 /cm2s/kW D-875 near Cryomodule n-flux ~ 0.6 x 102 n/cm2s/kW -flux ~ 1.0 x 105 /cm2s/kW SUMMARY n N_dump = 5 x N_cryo N_dump = 1 x N_cryo DarkLight CM Stony Brook Univ M. Hasinoff, UBC 9 2025-02-18
Oct 27/22 No Shielding E = 29.3 MeV Power ~ 1.15 kW DF ~ 7.5 % D-870 near dump n-flux ~ 9.0 x 102 n/cm2s/kW -flux ~ 2.7 x 105 /cm2s/kW D-880 near Cryomodule n-flux ~ 0.3 x 102 n/cm2s/kW -flux ~ 1.0 x 105 /cm2s/kW SUMMARY n N_dump = 30 x N_cryo N_dump = 3 x N_cryo DarkLight CM Stony Brook Univ M. Hasinoff, UBC 10 2025-02-18
Oct 31/22 No Shielding Power ~ 7 kW DF ~ 94% D-870 near dump n-flux ~ 2.8 x 103 n/cm2s/kW -flux ~ 8 x 105 /cm2s/kW D-880 near cryomodule n-flux ~ 14 n/cm2s/kW -flux ~ 2.1 x 104 /cm2s/kW SUMMARY n N_dump = 200 x N_cryo N_dump = 38 x N_cryo DarkLight CM Stony Brook Univ M. Hasinoff, UBC 11 2025-02-18
2.5cm Polyethylene/1.0 cm Pb Nov 21 Beam Tuning Unshielded placed in front Shielded placed behind Rates are very high in both locations 2025-02-18 DarkLight CM Stony Brook Univ M. Hasinoff, UBC 12
DarkLight CM Stony Brook Univ M. Hasinoff, UBC 13 2025-02-18
Aug 5 Beam on Target only 10% reaches the dump 14:25 -- 1 um Tgt 14:50 10 um Tgt D883 on floor shielded by concrete blocks D883 on white block DarkLight CM Stony Brook Univ M. Hasinoff, UBC 14 2025-02-18
