Weiss Christina amp Calviani Marco 16122010 16 December 2010 FLUKA Simulation for EAR2 1 Introduction 16 December 2010 FLUKA Simulation for EAR2 2 FLUKA simulation in support of EAR2 studies performed with focus on different ID: 1011771
Download Presentation The PPT/PDF document "FLUKA Simulation for EAR 2" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
1. FLUKA Simulation for EAR 2Weiss Christina & Calviani Marco16.12.201016 December 2010FLUKA Simulation for EAR21
2. Introduction16 December 2010FLUKA Simulation for EAR22FLUKA simulation in support of EAR2 studies, performed with focus on different possible applications:(n,γ), (n,f), (n,α) measurementsMaterial irradiation testsTest of active electronic equipment for LHC Radioprotection issues during facility operationImplemented Geometry best guess under present civil engineering conditionsPreliminary results for(n,γ), (n,f), (n,α) measurementsMaterial irradiation tests
3. Implemented Geometry16 December 2010FLUKA Simulation for EAR23
4. Overview of the n_TOF spallation target area16 December 2010FLUKA Simulation for EAR24n_TOF target pitTechnical gallery (@10 m from pit)EAR2 (@20 m from pit, above ground)Existing holeTo be builtISR
5. New target in position in the pit16 December 2010FLUKA Simulation for EAR25Opening on top of the spallation target structure EAR2 TOF tube looks there (less structural material in the beam)
6. Implemented Geometry16 December 2010FLUKA Simulation for EAR26Neutron tube:Positioned over the window in the target lidUp to access gallery inner diameter d1 = 38 cmUp to EAR2 inner diameter d2 = 20 cm50 cm concrete shielding around the neutron tube up to EAR2Up to beam dump inner diameter d2 = 20 cmCollimator:Conical shape (+ removable)2 m of Iron for moderation1 m borated polyethylene for capture of thermalized neutronsPositioned right before EAR 2
7. Connection tubes of the cooling circuit cooling circuit in b. 37516 December 2010FLUKA Simulation for EAR27Position of the EAR2-TOF tube
8. Implemented Geometry16 December 2010FLUKA Simulation for EAR28EAR2 situated at ground level ( ≈ 20 m) above the spallation target. Building and beam dump implemented with a preliminary civil engineering designBeam dump: 23.8 m above the targetIron: Dimensions: h = 4.9 cm w = 40 cm l = 40 cmBorated Polyehtylene, surrounded by 1mm Cd: Dimensions: h = 80 cm w = 40 cm l = 40 cm
9. 16 December 2010FLUKA Simulation for EAR29Beam DumpCollimatorø 20 cmø 35 cmn_TOF TargetService GaleryEAR 2
10. 1m ofBorated PolyethyleneØ 10 cm @ EAR 22m ofIronØ 13.1 cm @ entrance16 December 2010FLUKA Simulation for EAR210
11. Time Energy Relation for EAR216 December 2010FLUKA Simulation for EAR211Neutron EnergyTime of Flight EAR I [μs]185mTime of Flight EAR II [μs]20 mγ - Flash0,620.071 GeV0,710.081 MeV13,391,451 keV422,9645,731 eV13375,181445,971e-2 eV133751,8314459,66
12. Results16 December 2010FLUKA Simulation for EAR212
13. Neutron Fluence @ EAR216 December 2010FLUKA Simulation for EAR2133.6*10^5 n/cm^2/bunch5*10^5 n/cm^2/bunchIntegrated: 3.2*10^6 n/cm^2/bunchSpallation peak (up to a few hundret MeV)Evaporation peakThermal peak
14. Photon Spectrum EAR116 December 2010FLUKA Simulation for EAR214
15. Arrival Time @ EAR116 December 2010FLUKA Simulation for EAR215
16. Particle Fluence @ EAR216 December 2010FLUKA Simulation for EAR216Photon Fluence same order of magnitude like n (EAR1 ~ 10x)CP less than n(@ EAR1 2 orders higherwithout magnet)Magnet not needed for EAR2
17. Beam Profile @ EAR216 December 2010FLUKA Simulation for EAR21710.10.01[cm][cm] Profile10 cm afterImplemented CollimatorCollimator Size
18. Particle Fluence 1.5 m above Target16 December 2010FLUKA Simulation for EAR218Total number of neutrons:1.4*1010 n/cm2/pulse
19. Details for other applications follow by E. Chiaveri16 December 2010FLUKA Simulation for EAR219