Transcript NF poster
UK Neutrino Factory Conceptual Design Stephen Brooks, Christopher Prior ASTeC Intense Beams Group, RAL [email protected] This diagram shows the main subsystems of the neutrino factory. Four areas are highlighted in which the UK will perform key technology demonstrations within the next five years. Proton Driver Front End 180MeV H− Linac Proton Driver • Required energy 5-15GeV • Repetition rate 50Hz • Mean power 4-5MW • 3-6 bunches formed • Compressed to 1-3ns RMS Peak power 8-60TW 972MHz Side-Coupled Linac (SCL) to 180MeV 324MHz Drift Tube Linac (DTL) to 90MeV Beam Chopper RFQ to 3MeV LEBT at 35keV H− Ion Source Achromat for removing beam halo Two Stacked Proton Synchrotrons (full energy) • 6GeV • 78m mean radius • Each operating at 25Hz, alternating for 50Hz total Muon Ionisation Cooling Experiment (MICE) This project will construct a fully-engineered cooling cell with diagnostics and test its performance using muons extracted from the ISIS beam. See also: FETS poster Two Stacked Proton Synchrotrons (boosters) • 1.2GeV • 39m mean radius • Both operating at 50Hz (H− to H+/protons) A prototype of the first stages in a high power proton driver is being constructed at RAL. Muon Cooling Dogbone Dogbone Recirculating Linac (RLA) 5½ pass, 2-13GeV Residual proton Beam Dump FFAG Electron Model of Muon Acceleration (EMMA) See also: EMMA poster Solenoidal Muon Linac 0.2-2GeV Tungsten target enclosed in 20T solenoid (produces pions from protons) A new type of accelerator called a non-scaling FFAG is used in the final muon acceleration stages. The prototype EMMA is scheduled for construction at Daresbury. Pictured above is a test being conducted at RAL of the durability of wire samples of target materials under thermal shocks comparable to those in the real NF target, which are induced by an intense pulsed current. 2030s Muon Collider Plan view of the new accelerators superimposed on the RAL and Harwell site. Muon Decay Ring (muons decay to neutrinos) R109 FFAG 1 13-25GeV Present 2010s 2020s 150kW 1MW 2.5MW 5MW ISIS ISIS MW ESS-class Upgrades Machine Neutrino Factory Fundamental & Higgs Physics Solid Target R&D Programme RF Phase Rotator The neutrino factory complex could be built up in stages: upgrades to the ISIS proton synchrotron at RAL could supply both the neutrino factory and enhanced flux for existing neutron and muon science. The neutrino factory could itself be upgraded to a multi-TeV muon collider, which would have high-energy particle physics capabilities surpassing the LHC and ILC in several areas. Proton Power Neutron Science Neutrino Physics Solenoidal Decay Channel (in which pions decay to muons) See also: MICE poster The discovery of neutrino masses requires the standard model of physics to be modified. Measuring their mass precisely is one of the few ways a new theory can be constrained. The mass differences between neutrino flavours cause oscillation from one type to another with a wavelength proportional to D(Mass2)*(Baseline)/(Energy), meaning baselines in the >1000km range are needed for the best detectable >10GeV neutrinos. Staging Scenario (UK Case) Proton Driver Front-End Test Stand (FETS) Stripping Foil Physics Motivation Near Detector R110 FFAG 2 25-45GeV Neutrino Factory Far Detector 1 ~300m below ground Accelerator Science and Technology Centre Far Detector 2 www.astec.ac.uk