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Targetry

Explore potential collaboration areas in targetry R&D for high-power beams, focusing on NuMI and neutrino programs. Analyze existing facilities, target materials, and irradiation studies for improved beam intensities.

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Targetry

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  1. Targetry • NuMI Target Studies • Existing Areas of Collaboration Material Studies MERIT Experiment Steve Geer BNL Visit November , 2005

  2. Steve Geer BNL Visit November 2005 page 2 INTRODUCTION Targets for high-power beams are already a challenge. To make sure we can exploit increased beam power we must invest in targetry (& related) R&D. This is particularly important for the future neutrino program. There are already some areas of BNL-FNAL collaboration on targetry R&D. To stay ahead of the beam-power curve for the NuMI program we are looking at what will fail when, & how we might upgrade for higher intensities. This is a crucial activity & we would welcome exploring potential BNL-FNAL collaboration in the related studies.

  3. Steve Geer BNL Visit November 2005 page 3 NuMI Targetry Issues Present study being coordinated by Byron Lundberg • Assume 2MW of beam power becomes available • Determine inadequacies in existing facilities • Initiated engineering studies : NuMI neutrino beam • Identify the level (0.4 to 2MW) where component fails • Complete by June 2006 • Address inadequacies (incr. cooling capacity, design changes...)

  4. Steve Geer BNL Visit November 2005 page 4 NuMI Targetry Issues - 2 • Present NuMI primary proton target: • Graphite 3 KW load in 0.4 MW 120 GeV beam • 1mm s(x,y) - small beam size • Movable, inserted into Horn for LE n beam • For 2 MW: • Design depends on primary beam energy • Solid (graphite/Be?) still OK at ~20 KW loading but... • Power density needs to be reduced by 5 • bigger beam + less beam per msec • Low E : target integrated with Horn; Hi E : not

  5. Steve Geer BNL Visit November 2005 page 5 NuMI Targetry Issues - 3 • Completed analysis of 680m decay pipe • Presently analyzing proton dump and target chamber cooling • Target design continues to evolve - more robust versions of current design

  6. Steve Geer BNL Visit November 2005 page 6 MATERIAL IRRADIATION STUDIES FOR HIGH-INTENSITYPROTON BEAM TARGETS Initiated by the Neutrino Factory & Muon Collider Collaboration.Strategy: Irradiate new promising materials & measure resulting mechanicalproperties in a hot cell: BNL, Princeton, SLAC, KEK, FNAL Future target studies at FNAL AP-0(N. Mokhov, P. Huhr) • What we hope to get out of it ? • Shock induced failure • - Information regarding damage at different doses and at different different ratios of protons to neutrons

  7. Steve Geer BNL Visit November 2005 page 7 Existing Collaboration – Material Studies P. Huhr: Accelerator Division Mechanical Support Group • After Collider Run II ends, AP-0 could be converted into Target Test Facility. Some minor kicker changes could allow full NuMI beam to be delivered to tests at AP-0 (as NuMI operations allow) • Just after Run II: • 120 GeV • 7.5-10 e12 ppp • 0.5 Hz • Sigma 0.1 - 5 mm (2,000 - 3,000 J/g in Ni) • After proton intensity upgrade (proton driver, proton accumulator): • 120 GeV • 2.2 MW • 0.75 Hz • Sigma ??

  8. Steve Geer BNL Visit November 2005 page 8 Existing Collaboration – MERIT • Initiated by the Neutrino Factory & Muon Collider Collaboration. • 24 GeV CERN PS beam on a free 20m/s Hg-jet target in a 15T solenoid. • Approved and to run in 2007. • Up to 2.8  1013 POT in a 2ms spill • Lead Lab is BNL (H. Kirk). • Fermilab involvement is new: • N. Mokhov, S. Striganov, D. Jensen • MARS Simulations to predict dosesand fluxes • Considering possiblity of scintillation counters to monitor flux from target.

  9. Steve Geer BNL Visit November 2005 page 9 FUTURE HOPES • Explore collaboration on NuMI related studies. Example: Target cooling for a 2MW beam • Consolidate new (modest) FNAL involvement in MERIT • Perhaps think about Hg with a magnetic horn ?

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