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n _TOF Facility: Experimental Area 2 ( EAR2)

n _TOF Facility: Experimental Area 2 ( EAR2). E.Chiaveri / CERN EN-STI-EET. ITEMS to be discussed. Civil Engineering Radiation Protection Access P lanning Budget Staff Safety Next Meeting. New Experimental Area (EAR-2). EAR2. ~ 20 m. 10 m. n_TOF target. EAR-1

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n _TOF Facility: Experimental Area 2 ( EAR2)

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  1. n_TOF Facility: Experimental Area 2 ( EAR2) E.Chiaveri/ CERN EN-STI-EET EAR2 Meeting 15 September 2011

  2. ITEMS to be discussed EAR2 Meeting 15 September 2011 • Civil Engineering • Radiation Protection • Access • Planning • Budget • Staff • Safety • Next Meeting

  3. NewExperimentalArea (EAR-2) EAR2 ~ 20 m 10 m n_TOF target EAR-1 (at 185 m) Flight-path length : ~20 m at 90° respect to p-beam direction expected neutron flux enhancement drastic reduction of the t0 flash EAR2 Meeting 15 September 2011

  4. Comparison Neutron Fluence EAR1/EAR2 EAR2 Meeting 15 September 2011

  5. Neutron Fluence Comparison to EAR1 Reference for EAR1 : FLUKA Simulations with fission collimator (d = 8 cm) FLUKA Simulation for EAR2

  6. EAR2 Meeting 15 September 2011

  7. EAR2 Meeting 15 September 2011

  8. n_TOF barracks TOTEM barracks to be relocated EAR2 Meeting 15 September 2011

  9. EAR2 Meeting 15 September 2011

  10. EAR2 Meeting 15 September 2011

  11. EAR2 Meeting 15 September 2011

  12. EAR2 Meeting 15 September 2011

  13. EAR2 Meeting 15 September 2011

  14. EAR2 Meeting 15 September 2011

  15. EAR2 Meeting 15 September 2011

  16. FLUKA geometry • 3 D model of the bunker • No penetration (ventilation, detectors or other utilities) ? • Dump 4 cm iron + poly + cadmium + concrete (can be further optimized)

  17. Source term • Neutron spectrum from Christina and Marco (integral = 1.06E07 neutron/cm-2) • Source routine to sample from the energy distribution (normalization to 1 primary…) • Normalization for prompt dose rate calculations : = 1.06x1007 x p x 13/2 x 13/2 x 4 x 1.2 / 16.8 4.02E08 neutrons/s entering the area

  18. Prompt dose rate • Two scenarios : • Full beam goes to the dump (thin samples….) • Thick target inside the bunker scatters the incoming neutrons (detectors, samples for irradiation, flanges….) • Scoring prompt dose rate outside the bunker

  19. What is next ? • Study with updated neutron spectrum (better statistic) and photon spectrum • Define shielding requirements • Integration in ISR area ? Shielding issues ? • Tech. gallery radiation streaming to ISR public area • Integration of requirements for unsealed source handling • Documentation

  20. DRAFT EAR-2 MAD PAD EAR2 Meeting 15 September 2011

  21. Requirements for EAR2 • The Experimental Area on surface must be Work Sector Type A (WSTA) The main requirements with proposed main Actor are: • Drilling of the shaft on top of the Target (~10m) GS • Building on surface (WSTA conditions) GS+DGS/RP • Vertical beam dump (reduced neutron albedo)  EN/STI +DGS/RP • Monitored and filtered ventilation (WSTA conditions) EN/CV + DGS/RP • Changing room/Material Entrance (WSTA Conditions)EN/MEF • Monitoring: dose rate, aerosol concentration, hand-foot monitor, portable monitor DGS/RP • Controlled Access integrated in the new PS complex Access System upgrade GS/ASE List not exhaustive. EAR2 Meeting 15 September 2011

  22. Cost estimation for EAR2 • Dismantling barrack 559 • Drilling of the shaft on top of the Target • Construction of the Laboratory (~64m2 WSTA) • Vertical beam dump • Cooling & Ventilation • RP Monitoring • General Services • Contingency List not exhaustive EAR2 Meeting 15 September 2011

  23. EAR2 Meeting 15 September 2011

  24. Road map • A draft document has been presented to INTC July meeting. • In September/October a final draft including budget, • planning and personnel • A final document will be presented at the end of 2011 • to the Collaboration board • February 2012 final document will be presented to the INTC meeting • March Research Board for final approval EAR2 Meeting 15 September 2011

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