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UCN Facility at TRIUMF

PLACE UCN LOGO & ACRONYM HERE. UCN Facility at TRIUMF. L.Lee October 3, 2012. UCN Source (RCNP-TRIUMF). Horizontal Source/Bottle. This source is being developed in Japan and will be commissioned & tested at RCNP, followed by initial n-EDM measurements there until 2014

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UCN Facility at TRIUMF

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  1. PLACE UCN LOGO & ACRONYM HERE UCN Facility at TRIUMF L.Lee October 3, 2012

  2. UCN Source (RCNP-TRIUMF) Horizontal Source/Bottle This source is being developed in Japan and will be commissioned & tested at RCNP, followed by initial n-EDM measurements there until 2014 A beam line is being prepared for it at TRIUMF, for extended running periods at ~40x higher intensity (goal is to reach ~ 6000 UCN/cc at EDM cell)

  3. He-II cryostat 4He (4K,1K) 3He (0.8K) Isopure 4He phonon UCN n p Spallation Superthermal UCN Source Experiment Horizontal Source/Bottle D2O cryostat valve opens 2012-2014: Develop/Test Source (& nEDM) at RCNP [1+ mA] 2015: Source moves to TRIUMF 2016: Commission Source at TRIUMF [ramp to 40mA]

  4. He cryostat D2O cryostat “New” UCN source Cool-down of D2O cryostat successful Cooling tests of He-II cryostat Tests with beam in Apr-2013 (?) He UCN guide Leak Detector Status: UCN Source(s) at RCNP Achieved (with “old” UCN source) UCN prod. rate of 4 UCN/cc/s UCN density at UCN valve: 15 UCN/cc (90 neV) UCN density in Source (He-II): 180 UCN/cc (210 neV) Measurement of Ramsay fringes using nEDM setup at RCNP “Old” UCN source Vertical UCN bottle – 2011

  5. Proposed UCN Facility Main Cyclotron UCN Facility at TRIUMF: Meson Hall

  6. Existing Beamlines in Meson Hall • M13: PIENU Experiment currently running • M11: Detector Test-beam Facility • BL1B: Proton Irradiation Facility (PIF) M11 M13 BL1B BL1A

  7. Proposed UCN Facility (BL1U) • BL1U:UCN Beamline (EDM, tn, gravity,…) • M11: Beam deflected right (instead of left) when space needed • BL1B/PIF: remains operational when BL1A/U off (Cyc. cooldown) M11 BL1B BL1U BL1A

  8. N Quads Bender Kicker Septum BL1U: UCN Beamline Floorspace for Active Magnetic Shielding nEDM cell Spall.n Target UCN Source Shield Pyramid BL1B BL1U BL1A

  9. N Proton Beam “kicked” every 3rd pulse to UCN Beamline & Spall.n Target (40mA, 500MeV) Beamline 1A (80-120mA, 500MeV) Beam Sharing in the Meson Hall Kicker and Septum magnets allow beam to be shared between BL1A(mSR) and BL1U(UCN) Spallation Target Kicker Septum

  10. Kicker ramps (up and down) during notches Beam Chopping between UCN and mSR production targets Beam Sharing between UCN and mSR targets mSR beam 20kW thermal cycling on Tungsten target UCN beam

  11. N Kicker Magnet Fast-switching, High rep-rate 2 Coils, 6 turns each Length: ~1.7 m long Aperture: 100 mm x 100 mm Current: 200 A [240 A]  B•dL: 0.0545 T•m Max field in aperture: 36.3 mT Deflection: 12 mr [15 mr max] Rise/Fall time:  50 ms Max Voltage: ± 1800 V (ramp) Flattop: 1 ms ( 4% ripple p-p) Rep. Rate: 330 Hz Non-metallic beamtube (~2m) with vacuum flanges required Technical review completed, tendering soon BL1U: Kicker Magnet Kicker

  12. N BL1U: Septum Magnet Lambertson-style Septum Conventional magnet struct. More robust (no high power current-sheet, coils farther from beam) Deflected beam is bent in a direction  to original “kick” Modification of an existing magnet (PARITY dipole, pole & upper coil moved down to relocate gap near the top)  B•dL: ~ 0.56 T•m Bend Angle: ~145 mr Technical review completed, detailed engineering underway Septum

  13. N BL1U: Dipole & Quadrupole Magnets Dipole magnet: 1UB2 Quadrupole magnets: 1UQ7,Q8 Conventional dipole magnet Fabricated and mapped (KEK) Conventional quadrupole magnets On-hand (tagged for UCN) Quads Bender

  14. N KEK-inspired UCN Tungsten Spallation Target 4 Tungsten Blocks: 20mm, 20mm, 30mm, 50mm thickness; 78mm x 57mm cross-section 20 kW beam power (1 min ON, 4 min OFF), Heat Deposition ~14 kW; Water-cooled Conceptual design, Thermal & Stress study (ANSYS) completed BL1U: Spallation Target Spallation Target

  15. N Water Treatment Facility BL1U: UCN Source, Shielding & R/H System Shielding Pyramid Conceptual Design (“Redesign”) Target R/H System Conceptual Design UCN Source

  16. Concrete Layer 20K D2O Moderator Steel Layer Immovable Block Graphite Reflector/Moderator BL1U: Shielding Pyramid & UCN Source (Downstream Section of BL1U) BL1U

  17. 20K D2O moderator 3He/He-II cryostat UCN Guide (He-II) Aluminum Crypt containing graphite, cooled by flowing Helium gas Target Insertion port in Aluminum Crypt BL1U: Shielding Pyramid & UCN Source (Upper Shielding Layers Hidden) BL1U

  18. BL1U: Target Remote-Handling LANL-inspired Target Remote-Handling system (Target Fully Inserted) Lead Casket BL1U Target Target Insertion port Tracks

  19. BL1U: Target Remote-Handling LANL-inspired Target Remote-Handling system (Target Fully Withdrawn) Target Lead Casket BL1U Target Insertion port Shielding Plug Tracks

  20. Liquid Helium Supply TRIUMF intends to order a new LindeL1610 helium liquefier (for CMMS & UCN program) The L1610 uses a piston-type expander engine Using LN2 for precool, it can produce62L/hr (improved heat-exch.r) 20% of its capacity will be needed for other TRIUMF programs, leaving 80% for UCN (Allows ~1200L/day for UCN; At 40mA, UCN requires ~1600L/day, maybe more) For the initial phase of the UCN program, this may be adequate For eventual 40 mA operation, a second liquefier will be needed We plan to transfer directly from the large liquefaction dewar into the UCN cryostat via a long (20-40m) low-loss (30-50 mW/m) LN2-jacketed transfer line Helium auto-fill system will be designed & built this fiscal year (first use will be at RCNP)

  21. Schedule( 2010-2016 ) 2015 2016 2014 2017 2011 2013 2012 ACTIVITY J A J O J A J O J A J O J A J A J O J A J O J A J O MILESTONES Activities Elsewhere (KEK, RCNP, CERN, Acsion) Shutdown Activities Non-Shutdown Activities UCN Schedule (Draft) 2015 2016 2014 2017 2011 2013 2012 MESON HALL (& Vault): Cleanup M11,1A/1B roof-beam Dismantle PIENU & M13-DS Dismantle M13-US, Mod.Shld Mod. 1VQ4/Q5; BL1V & Shld Design/Fabr Core M13 I-block BEAMLINE 1U: Kicker Design & Review Order/Fabricate/Deliver Install Kicker Ceramic Beamtube Design/Order Fabricate Install Septum Test Design & Review Order/Mod Install Dipole Test Order/Fabricate Install Beamline (incl Quads, PS,…) Test Install Design & Review Order/Fabricate UCN APPARATUS: Spallation Target & R/H Design/Order/Fabricate Test Specify/Conceptual design Install UCN Source Install/Test & Run @ RCNP Design/Fabricate UnInstall Test Install Shielding Install Install Design & Review Procure shielding blocks Install COMMISSION @ TRIUMF Beamline Commissioning UCN Source Commissioning HELIUM LIQUEFIER: He Liquefier System Procure/Install Upgrade He Liquefier System Procure Install

  22. N 2015 Non-Shutdown & 2016 Shutdown 2015 Shutdown 2014 Shutdown UCN Installation Schedule

  23. UCN Facility Installation & Beyond 2014-2016 UCN Installation Periods  Commission UCN Facility during 2nd half of 2016  nEDM measurements (see Jeff’s talk) Beyond 2016 Helium Facility  Liquefier Upgrade (Second Liquefier) Power Supplies  Upgrade Magnet Power Supplies Facility Upgrade (Experiment Area) for nEDM-Phase2  Active-Shielding (Magnetic) Facility  Extend Radiation Shielding for enlarged experiment area

  24. FINIS

  25. N

  26. UCN Facility at TRIUMF Institutions: TRIUMF, KEK, RCNP, Osaka U., NCSU, SFU, TIT, UBC, U.Manitoba, UNBC, U.Winnipeg Goal: Produce the world’s most intense source of UCNs for Fundamental and Materials Sciences Research. Plan: Develop and Test the UCN Source, as well as the n-EDM apparatus, in Japan (RCNP,10-26 e•cm); Move the equipment to Canada (TRIUMF), where higher intensity beams are available, in 2015. 1st Phase: nEDM-1 (10-27 e•cm) 2nd Phase: nEDM-2 (10-28 e•cm)

  27. Neutron EDM Summary Aim for dn10-28 e•cm in the next decade  Use established technologies (except for Superfluid He UCN source and 129Xe co-magnetometer)  Start with small EDM cell (better for systematics, cost effective) Phased approach to achieve 100-fold improvement in dn limit  EDM expt @ RCNP till 2014: dn10-26 e•cm (UCN source development with beam up to 10mA) (EDM apparatus development, including co-magnetometer)  Initial Phase @ TRIUMF, 2016-17: dn10-27 e•cm (Gradually increase current to 40mA & extend running time)  2nd Phase @ TRIUMF, 2018- : dn10-28 e•cm

  28. UCNs and the Neutron EDM • Why use UCNs ?  UCNs can be trapped in a material bottle,magnetic bottle,or gravity-well  UCNs have long (macroscopic) storage times  Neutrons can be 100% polarized • Can manipulate and measure the magnetic moment of UCNs • Neutron EDM Measurement •  Method: Measure change in UCN spin precession under B and E fields •  Use NMR Techniques  Ramsey Resonance Method EDM:dn= (h/2E)(n1-n2)

  29. UCN Sources Around the World

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