A New DC Muon Beam Source: MuSIC - Status and Prospects - Akira - PowerPoint PPT Presentation

A New DC Muon Beam Source: MuSIC - Status and Prospects - Akira SATO Department of Osaka University International Workshop on Neutrino Factories, Super Beams and Beta Beams: NuFact2012 July 23-28, 2012, Williamsburg, VA USA 20+5 min μ

Akira SATO MuSIC - Status and Prospects -、2012/07 Contents Overview of the MuSIC Results from beam tests Summary 2 • Concept • Status and schedule • Expected muon yield by simulation • Design • Muon collection efficiency • high current operation 写真 : 毎日新聞社

Akira SATO MuSIC - Status and Prospects -、2012/07 Overview 3

Akira SATO One on the main projects of RCNP program in a new A muon transport solenoid with dipole field beam lines muon collection efficiency > 10 3 than conventional muon • The first pion capture solenoid system Technical points of the MuSIC program of Research Center for Subatomic Science. 10 8-9 μ/s ＠392MeV,1μA proton beam MuSIC - Status and Prospects -、2012/07 • Design muon intensity： 400W proton beam from RCNP ring cyclotron • first pion capture solenoid system. The world’s most efficient DC muon beam source using the MuSIC What is the MuSIC? 4

Akira SATO Muon collection at the MuSIC 5 MuSIC - Status and Prospects -、2012/07 MuSIC,COMET/Mu2e,PRISM, Conventional muon beam line MuSIC Neutrino factory, Muon collider proton beam proton beam J-PARC MuSIC MUSE proton beam muons proton beam -0.4kW -1000kW target target graphite graphite t200mm Transport solenoid Capture magnets t20mm φ 40mm φ 70mm Capture solenoid SuperOmega proton beam loss Ω :400mSr < 5% muons Collect pions and muons by 3.5T solenoidal field to the neutron facility to a beam dump Large solid angle & thick target

Akira SATO MuSIC - Status and Prospects -、2012/07 The Final Layout of MuSIC 6 Particle physics Nuclear physics, material science, chemical ... Muon storage ring Accelerator Pion and R&D muon transport solenoid Muon beam Pion capture Proton beam solenoid Superconducting magnets R&D

Akira SATO MuSIC - Status and Prospects -、2012/07 MUSIC@RCNP, Osaka Univ. RCNP has two cyclotrons. A proton beam with 392MeV, 1μA is provided from the Ring Cyclotron (up to 5μA in near future). The MuSIC is in the largest experimental hall, the west experimental hall. 7 Ring Cyclotron AVF Cyclotron Research Center of Nuclear Physics (RCNP), Osaka University, Japan MuSIC West Experimental Hall

Akira SATO measurement of neutron flux and energy around the MuSIC MuSIC - Status and Prospects -、2012/07 • the design muon collection efficiency was confirmed by the measurement 2011, Oct.：4th beam test（I proton =~4nA） • muonic-Xray measurements with a higher statistics • 2012, Mar.：East side radiation shielding blocks were located. muon life measurements with a higher statistics 2012JYP 2012, Jun 18-22：5th beam test • measurements for muon energy and spatial distribution • the system was operated with a high current proton beam （I proton =~1microA） 8 • muonic-Xray measurements • proton beam hits the production target, History of MuSIC Projects 2009JPY Construction of a proton beam line, pion capture system, and transport solenoid (up to 36 deg) 2010JPY Commissioning of super-conducting magnets of pion capture and transport 2011, Jun.：3rd beam test（I proton =~4nA） • 2010, Jul.：1 st beamtest（I proton =3nA） • Every system worked successfully, • observed secondary particles ay the end of the transport solenoid 2011, Feb.：2 nd beam test（I proton =~4nA） • muon beam was counted form their life spectrum, 2011JYP Construction Commissioning Muon collection efficiency High current operation

Akira SATO パイオン捕獲部 MuSIC - Status and Prospects -、2012/07 位相空間回転部 パイオン崩壊 ミューオン輸送部 陽子ビームライン部 装置全体のレイアウト 9 Schedule Muon storage ring Matching and Pion and muon injection system transport solenoid 2015 JPY 2013-2014 JPY Constructed in 2009 JPY and operated 2015-2016 JPY Proton beam line Pion capture solenoid * The schedule depends on the budget situation. 7

Akira SATO MuSIC - Status and Prospects -、2012/07 Muon beam from MuSIC by simulation Changing magnitude and direction of the dipole field, we can select charge and momentum of the beam. 10 by g4beamline, QGSP_BERT, E p =392MeV h25 h25 h26 h26 h27 h27 h28 h28 Muo n+, P at monitor1 1, By =0.02 T Muo n+, P at monitor1 1, By =0.04 T Muo n+, P at monitor1 1, By =0.06 T Muo n+, P at monitor1 1, By =0.08 T Entries Entries 2 119 2 119 Entries Entries 4650 4650 Entries Entries 6533 6533 Entries Entries 7 112 7 112 By=+0.08T 800 800 800 By=+0.06T 800 By=+0.02T By=+0.04T (particles/4MeV/c/100M-protons) (particles/4MeV/c/100M-protons) (particles/4MeV/c/100M-protons) (particles/4MeV/c/100M-protons) Mean Mean 28.73 28.73 Mean Mean 39.65 39.65 Mean Mean 52.97 52.97 Mean Mean 65.34 65.34 RMS RMS 10.6 10.6 RMS RMS 13.57 13.57 RMS RMS 14.96 14.96 RMS RMS 15.81 15.81 By=0.02T By=0.04T By=0.06T By=0.08T Underflow Underflow 0 0 Underflow Underflow 5 5 Underflow Underflow 16 16 Underflow Underflow 52 52 700 700 700 700 Overflow Overflow 0 0 Overflow Overflow 0 0 Overflow Overflow 0 0 Overflow Overflow 0 0 Integral Integral 2 119 2 119 Integral Integral 4645 4645 Integral Integral 6517 6517 Integral Integral 7060 7060 600 600 600 600 500 500 500 500 400 400 400 400 300 300 300 300 200 200 200 200 100 100 100 100 0 0 0 0 0 20 40 60 80 100 120 140 160 180 0 20 40 60 80 100 120 140 160 180 0 20 40 60 80 100 120 140 160 180 0 20 40 60 80 100 120 140 160 180 p (MeV/c) p (MeV/c) p (MeV/c) p (MeV/c) Muo n+, P at monitor1 1, By =0.00 T h24 h24 Entries Entries 346 346 800 (particles/4MeV/c/100M-protons) By=0 Mean Mean 21.1 21.1 RMS RMS 7.944 7.944 By=0.00T Underflow Underflow 0 0 700 Overflow Overflow 0 0 Integral Integral 346 346 red ： positive muon 600 500 400 blue ： negative muon 300 200 100 0 0 20 40 60 80 100 120 140 160 180 p (MeV/c) h23 h23 h20 h20 M uon +, P at mon itor1 1, By =-0.02 T M uon +, P at mon itor1 1, By =-0.04 T h22 h22 M uon +, P at mon itor1 1, By =-0.06 T h21 h21 M uon +, P at mon itor1 1, By =-0.08 T Entries Entries 0 0 Entries Entries 0 0 Entries Entries 12 12 Entries Entries 1 1 800 800 800 800 By=-0.08T By=-0.06T By=-0.02T By=-0.04T (particles/4MeV/c/100M-protons) (particles/4MeV/c/100M-protons) (particles/4MeV/c/100M-protons) (particles/4MeV/c/100M-protons) Mean Mean 0 0 Mean Mean 0 0 Mean Mean 12.81 12.81 Mean Mean 6.453 6.453 RMS RMS 0 0 RMS RMS 0 0 RMS RMS 4.279 4.279 RMS RMS 0 0 By=-0.02T By=-0.04T By=-0.06T By=-0.08T Underflow 0 Underflow 0 Underflow 0 Underflow 0 Underflow Underflow 0 0 Underflow Underflow 0 0 700 700 700 700 Overflow Overflow 0 0 Overflow Overflow 0 0 Overflow 0 Overflow 0 Overflow 0 Overflow 0 Integral Integral 0 0 Integral Integral 0 0 Integral Integral 12 12 Integral Integral 1 1 600 600 600 600 500 500 500 500 400 400 400 400 300 300 300 300 200 200 200 200 100 100 100 100 0 0 0 0 0 20 40 60 80 100 120 140 160 180 0 20 40 60 80 100 120 140 160 180 0 20 40 60 80 100 120 140 160 180 0 20 40 60 80 100 120 140 160 180 p (MeV/c) p (MeV/c) p (MeV/c) p (MeV/c) 7

Akira SATO 11 MuSIC - Status and Prospects -、2012/07 by simulation Muon beam from MuSIC by g4beamline, QGSP_BERT, E p =392MeV B y (T) N(µ + ) for I p =1µA N(µ - ) for I p =1µA N(µ + ) /N(µ - ) -0.08 0 1E+08 0 -0.06 0 9E+07 0 -0.04 6E+04 5E+07 1E-03 -0.02 7E+05 2E+07 3E-02 0 2E+07 4E+06 5E+00 0.02 1E+08 0 - 0.04 3E+08 0 - 0.06 4E+08 0 - 0.08 4E+08 0 - The proton beam current will be upgraded to 5 μ A in near future.

Akira SATO μSR (a μSR apparatus is needed) 10 5-6 μ + /sec, polarized muon acceleration, deceleration, and phase rotation • cooling methods • FFAG, RF • Superconducting solenoid magnets • (for PRISM/neutrino factory/muon collider) : Accelerator / Instruments R&D Materials Science : MuSIC - Status and Prospects -、2012/07 chemistry on pion/muon atoms 10 5-6 μ - /sec Chemistry : pion capture and scattering nuclear muon capture (NMC) 10 5-6 μ - /sec Nuclear Physics : DC continuous beam is critical • search for μ→eee (muon LFV) 10 8-9 μ + /sec Particle Physics : Examples of Muon Science at MuSIC 12

Akira SATO MuSIC - Status and Prospects -、2012/07 Details 13

Akira SATO MuSIC - Status and Prospects -、2012/07 MuSIC: Present Layout 14

Akira SATO MuSIC - Status and Prospects -、2012/07 MuSIC＠RCNP-West Hall（~2012 Feb） 15