Application of FLUKA to fixed- target programs at CERN: a short, not exhaustive selection M. Calviani (CERN) With contributions from: M. Brugger, F. Cerutti, E. Chiaveri, A. Ferrari, E. Nowak, K. Roeed, S. Roesler, P. Sala, Heinz Vincke and V. Vlachoudis

Outline 28 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft n_TOF experiment Neutrino physics (CNGS/CENF) Physics and facility performance optimisation R2E (CNGS  LHC) Machine reliability AD-target area North Area Upgrade and consolidation  FLUKA is a multipurpose tool  Indispensable for a multitude of application at CERN  From microcropic models to macroscopic quantities!  A short selection but certainly of “fresh” use!

3  White neutrons spallation source  Neutron-induced reaction cross- section measurement  Pb target, 20 GeV/c p+, 8*10 12 p/pulse 8 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft Physics and facility performance optimisation n_TOF FLUKA used for physics optimisations (1 st and 2 nd target) and issues resolution

4   - -induced neutron background during n_TOF-Ph1  Borated water circuit optimisation  n_TOF EAR2 fluence 8 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft Physics and facility performance optimisation n_TOF Energy distribution of prompt and delayed components of in-beam photons 25x

58 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft Physics and facility performance optimisation CERN Neutrino to Gran Sasso (CNGS) Mechanical & thermal analysis Radiation resistance Energy deposition & DPA Radioprotection Intervention planning Prompt and residual dose

68 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft Physics and facility performance optimisation CERN Neutrino to Gran Sasso (CNGS) Commissioning Beam diagnostics Beam monitors response Energy Composition & “history” Neutrino

7  Proposed new neutrino facility in the North Area (link):link  Investigate sterile neutrino physics (link)link  Detector R&D in view of future collaborations 8 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft Physics and facility performance optimisation CENF (CERN Neutrino Facility) * * New reference Original LOI  fluence Beam optimizationEdep & radioprotection

From 2008: <10 6 HEH/cm 2 /y 8  After ~8*10 17 POT, failure of ventilation system in CNGS tunnel area due to radiation effects in control electronics  SEU due to high energy hadrons (≥20 MeV)  FLUKA massively employed to study the problematic and optimize the shielding configuration 8 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft Machine reliability R2E (CNGS) 2006/ HEH/cm 2 /y Situation prior to 2007/2008 shutdown Situation after to 2007/2008 shutdown

Identification of LHC sensitive areas Tunnel Alcoves Caverns FLUKA simulations DPMJET! Evaluate criticalities of different areas Helping defining a strategy Mitigation strategy & cross- checks/benchmarks pre & post-LS1 activity 9  The CNGS issue triggered a review on the LHC side…  … R2E Study Group - Project 8 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft Machine reliability R2E (LHC) UX85 (LHCb) Point 7

10  Antiproton production zone  FLUKA employed for (example):  Controls sensitivity definition  Radiation field characterization 8 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft Upgrade and consolidation AD-target Evaluate sensitivity of target/horn misalignment Radiation field analysis (cross- checks) ~70% 5 mm shift Agreement within 20% with RadMons Agreement within 30% with RadFETs, PSAIF, HLDs…

11  Model the whole TCC2 area in FLUKA:  General purpose calculations (RP + secondary particle beams)  Support the upgrade of the TCC2 target heads 8 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft Upgrade and consolidation North Area Targets TAX

TAX T6 T2/T4 128 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft Upgrade and consolidation North Area PRELIMINARY Good agreement (within factor of 2x) with HLD data  5/20 kGy/y

138 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft Upgrade and consolidation PS Booster Dump FLUKA energy deposition ANSYS (FEA/CFD) analysis New PSB dump Upgrade of the PS-booster dump PSB cooling system conceptual design

Conclusions 148 April 2013 M. Calviani - 80th Birthday Celebration in Honour of Professor Johannes Ranft