High Power Cyclotrons for the Neutrino Experiments ...
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High Power Cyclotrons for the Neutrino Experiments DAEδALUS and IsoDAR R.J. Barlow, A. Bungau, A.M. Kolano, Huddersfield University, Huddersfield, UK F. Meot, BNL, Upton, Long Island, New York, USA, M. Shaevitz, Columbia University, New York, USA, L. Calabretta, INFN/LNS, Catania, Italy, J. R. Alonso, W. Barletta, A. Calanna, D. Campo, J. A. Conrad, MIT, Cambridge, Massachusetts, USA, A. Adelmann, PSI, Villigen, Switzerland, H. Owen, Manchester University, Manchester, UK Goal: measure fundamental CP violating phase δ through studying muon to electron antineutrino oscllations as function of length, with one detector and several sources. Further details: M. Abs et al, “Multimegawatt DAEδALUS Cyclotrons for Neutrino Physics”, arXiv : 1207.4895 Detect electron anti-neutrinos through inverse beta decay process: very clean Ion source delivering 50 mA of H 2 + ions at 70 keV Injector Cyclotron (DIC) 5 mA, up to 60 MeV/amu Primary Cyclotron (DSRC) up to 800 MeV/nucleon Foil stripper Target Use H 2 + ions Overview Extraction by stripping Reduced effect of space charge Binding energy 2.8 eV so no Lorentz stripping, even in 6T Not all ions from source produced in ground state Studies being done H H DIC Daeδalus Injector Cyclotron 4 sectors 70 Mev (35 MeV/n) ~ 1 T field 450 tons RF Four double gap cavities 49.2 MHz (6 th harmonic) Acceleration in 107 turns Extraction with electrostatic separators + magnets (2cm separation between orbits) Space charge effects important IsoDAR Physics from the injector cyclotron 60 MeV H 2 + (30 MeV protons) on 9 Be/ 7 Li target Makes 8 LI – source of electron antineutrinos (~ 10 x present data samples) Detect in nearby (~20m ) large detector Check out 'reactor anomaly' – small deficit which could be due to 4th sterile neutrino See nearby poster for details First stage: the source Versatile Ion Source (VIS) built at Catania 2.45 GHz microwave discharge source 20 mA of H 2 + already extracted Tests of source and matching to cyclotron optics currently under way at BEST cyclotrons, Vancouver Daeδalus Superconducting Ring Cyclotron DSRC Energy 1.6 GeV (800 MeV/n) Beam current 5 mA Magnet Current 5000A Field up to 6.2 T 8 SC coils LHe cryostat Strong magnetic forces (MegaNewtons) Like Riken SRC Extraction by thin(2 mg/cm 2 ) pyrolitic graphite foil Any H 0 extracted cleanly Pulse length < 1ms to stop overheating Good isochronicity Tune variation RF cavities 49.2 MHz, Q=37,500 0.5 MW 0.5 – 1.0 MV
Transcript of High Power Cyclotrons for the Neutrino Experiments ...
High Power Cyclotrons for the Neutrino Experiments DAEδALUS and IsoDAR
R.J. Barlow, A. Bungau, A.M. Kolano, Huddersfield University, Huddersfield, UK F. Meot, BNL, Upton, Long Island, New York, USA, M. Shaevitz, Columbia University, New York, USA, L. Calabretta, INFN/LNS, Catania, Italy,J. R. Alonso, W. Barletta, A. Calanna, D. Campo, J. A. Conrad, MIT, Cambridge, Massachusetts, USA, A. Adelmann, PSI, Villigen, Switzerland, H. Owen, Manchester University, Manchester, UK
Goal: measure fundamental CP violating phase δ through studying muon to electron antineutrino oscllations as function of length, with one detector and several sources.
Further details: M. Abs et al, “Multimegawatt DAEδALUS Cyclotrons for Neutrino Physics”, arXiv : 1207.4895
Detect electron anti-neutrinos through inverse beta decay process: very clean
Ion source delivering 50 mA of H2+ ions at 70 keV
Injector Cyclotron (DIC) 5 mA, up to 60 MeV/amu
Primary Cyclotron (DSRC) up to 800 MeV/nucleon
Foil stripper
Target
Use H2
+ ionsOverview
Extraction by stripping
Reduced effect of space charge
Binding energy 2.8 eVso no Lorentz stripping, even in 6T
Not all ions from source produced in ground stateStudies being done
H
H
DICDaeδalus Injector Cyclotron
4 sectors70 Mev (35 MeV/n)~ 1 T field
450 tons
RFFour double gap cavities49.2 MHz (6th harmonic)Acceleration in 107 turns
Extraction with electrostatic separators + magnets(2cm separation between orbits)
Space charge effects important
IsoDARPhysics from the injector cyclotron
60 MeV H2
+ (30 MeV protons) on 9Be/7Li targetMakes 8LI – source of electron antineutrinos(~ 10 x present data samples)Detect in nearby (~20m ) large detectorCheck out 'reactor anomaly' – small deficit which could be due to 4th sterile neutrino
See nearby poster for details
First stage: the sourceVersatile Ion Source (VIS) built at Catania2.45 GHz microwave discharge source20 mA of H
2+ already extracted
Tests of source and matching to cyclotron optics currently under way at BEST cyclotrons, Vancouver
Daeδalus Superconducting Ring CyclotronDSRC Energy 1.6 GeV (800 MeV/n)
Beam current 5 mA Magnet Current 5000AField up to 6.2 T
8 SC coils LHe cryostatStrong magnetic forces (MegaNewtons)Like Riken SRC
Extraction by thin(2 mg/cm2) pyrolitic graphite foilAny H0 extracted cleanly Pulse length < 1ms to stop overheating
Good isochronicity
Tune variation
RF cavities49.2 MHz, Q=37,5000.5 MW0.5 – 1.0 MV
