1. Rare Isotope Science Project 신 택 수신 택 수 Detection Systems Team Division of Experimental Systems RISP 워크숍 23 May, 2013 검출장치팀 업무 보고

2. Nuclear Science Facilities @ RAON 2/23 RISP workshop Nuclear Science Facility Applied Science Facility Recoil spectrometer Large acceptance spectrometer High-resolution spectrometer & Zero-degree spectrometer  -Nuclear magnetic resonance & μ-spin rotation/relaxation (  -NMR & μSR) Ion trap & Laser spectroscopy Bio-medical facility Neutron science facility Experimental Facility at RAON ISOL Facility RISP 3.3&3.4 RISP 3.3.1 RISP 3.4.1 RISP 3.4.3

3. Nuclear Science Facilities @ RAON 2/23 RISP workshop Low Energy Experimental Hall - KOBRA - LAMPS-L Intermediate Energy Experimental Hall (I) - LAMPS - HRS - ZDS Muon(CLFV)

4. Member and Task 3/23 RISP workshop 이름직위 / 직급업무 김기동연구위원 ( 팀장 ) 권영관연구위원 KOBRA 김영진연구위원 LAMPS 신택수연구위원 HRS/ZDS, EDM 김영진 2 연구위원 Data acquisition 김용학연구위원 Electronics 정인일연구위원 Electronics 박준식연수인력 Ion optics

5. KOBRA (Korea Broad acceptance Recoil Spectrometer and Apparatus)

6. KOBRA 5/23 RISP workshop Main facility for nuclear structure and nuclear astrophysics studies with low-energy stable and rare isotope beams High quality & Low Energy stable and radioactive ion beams High performance spectrometer with detection system RAON KOBRA @ SIBs : RIBs : (SCL1) (SCL3) (ISOL+SCL3) E beam < 18.5 MeV/nucleon * Associate equipments FPEquipments F0 RI production target, beam swinger (optional) F3 gas-jet target, gamma-array, detection system,  -NMR F5Focal plane detection system

7. KOBRA 6/23 RISP workshop Beam Requirement Main Research Subject RI Beam species Energy Range [ A MeV ] Desired Intensities [ particles / sec ] Research fields 80 Ni, 76 Fe, 132 Sn, 144 Xe5-20> 10 8 Nuclear Structure 15 O< 10> 10 5 Nuclear astrophysics 25 Al, 26m Al, 44 Ti< 5-20> 10 5-6 Nuclear astrophysics 45 V< 3> 10 7 Nuclear astrophysics 39 Si, 36 Mg5-10> 10 7-9 Nuclear Structure 64 Ni, 58 Fe (stable)< 10> 10 12 SHE 1) Nuclear structure of exotic nuclei near the drip lines 2) Astrophysically important nuclear reactions 3) Rare event study - Super Heavy Element (SHE), New isotopes 4) Nuclear physics with polarized beam/target

8. KOBRA 7/23 RISP workshop System Requirement 1) RIBs production via In-Flight method with high-intense SIBs  ~10 6 pps, ~100% 2) Large angular acceptance for more dissipative reactions  > ± 100 mrad 3) Large momentum dispersion for high resolution spectroscopy  > 2.0 cm/% 4) Polarized beam/target Design Concept 1) Two stage - Stage 1 (F0~F3) :Production and separation of RIBs via In-Flight method with high intensity SIBs from SCL  can produce p-rich RIBs up to A~80 - Stage 2 (F3~F5) : Big-bite spectrometer with Wien filter  large acceptance 2) Secondary target is located at F3 - Enough space around F3 (~3m) : In-beam gamma-ray spectroscopy, SHE, spin physics, charged particle spectroscopy etc F0 F3 F5

9. KOBRA 8/23 RISP workshop Ion Optics Calculation  Main Specification

10. KOBRA 9/23 RISP workshop Magnets Design Dipole type 1 Dipole type 2 Quadrupole type 1 Quadrupole type 2 Quadrupole type 3

11. KOBRA 10/23 RISP workshop Design of Associate Equipment [Gas-jet target][PPAC] [Gamma array] Collaboration Sungkyunkwan Univ, Chung-Ang Univ, Hoseo Univ (Korea) KEK, RIKEN, U of Tokyo, Tohoku Univ (Japan) TRIUMF (Canada) [MCP] Details in TDR…

12. LAMPS (Large Acceptance Multi-Purpose Spectrometer)

13. LAMPS 11/23 RISP workshop Nucleus-Nucleus Collision Experiment for Studying Nuclear Symmetry Energy To cover entire energy range at RAON with complete event reconstruction within large acceptance (e.g. 3πSr TPC & ±50mSr Dipole Spectrometer Ca, Ni, Sn, Xe RI beams on stable targets) Cluster detector (Si+CsI) Neutron Detector (Scintillator array) Vacuum Gamma detector  (fm -3 ) CDR, FAIR (2001)

14. LAMPS 12/23 RISP workshop Low Energy Experimental Setup (E beam < 18.5A MeV) 17.5 o 145 o 15 o cone to allow neutron detection 25 o cone to allow target installation 93 Si-CsI units at 40 cm 17.5 o 145 o 11.5 o 120 neutron detector units at 3.25 m Solid angle = 133.3 mSr 11.5 o < 0.l Energy Resolution Si: 0.5% of FWHM CsI: 2.0% of FWHM

15. LAMPS 13/23 RISP workshop Total 58 detector units (17.5 o <  lab < 77.5 o ) 9 x 9 x 0.01 cm 3 Si (3 x 3 Pad) 9 x 9 x 5 cm 3 CsI (PMT readout) Total 35 detector units (78 o <  lab < 150 o ) 15 x 15 x 0.01 cm 3 Si (3 x 3 Pad) 15 x 15 x 5 cm 3 CsI (PMT readout)

16. LAMPS 14/23 RISP workshop High Energy Experimental Setup (18.5A MeV < E beam < 250A MeV) Bump coil Return yoke Cylindrical Solenoid Magnet Total size 2.6 x 2.6 m 2 TPC size 1.0 x 1.2 m 2 B ope. ~ 0.5T, B max. ~ 1 T  B/B < 2% TPC Getting suggestions and quotations from domestic companies

17. LAMPS 15/23 RISP workshop TPC Complete 3D charged particle tracking - Particle identification and momentum reconstruction 1.0 x 1.2 m 2 GEM based 90K readout channels 1 st TPC Prototype Active volume: 10 x 10 x 20 m 3 GEM based 635 readout channels Study of test data is in progress 2 nd TPC Prototype design is ongoing (1/8 size of real)

18. 500  m LAMPS 15/23 RISP workshop Si-CsI module Si: 2 x 8 pad readouts CsI: 4 x 4 APD readouts Charged particle veto: 5 x 5 x 200 cm 3 20 BC-408 10 x 10 x 200 cm 3 /layer 4 – 5 coupled layers ½ length prototype produced and tested with source Beam test is planed Real size prototype will be produced

19. HRS/ZDS (High Resolution Spectrometer / Zero Degree Spectrometer)

20. HRS/ZDS 17/23 RISP workshop High Resolution Spectrometer (HRS) High resolution magnetic analysis spectrometer for study of nuclear structure using IF beam Radioactive isotope (RI) beam induced charge exchange reactions to study nuclear spin-isospin responses within 100 – 300 MeV/A High spin state search with neutron rich exotic nuclei Garmov-Teller (GT) resonances, Giant dipole resonance, Giant monopole, Halo and light exotic nuclei study Specs SHARAQ spectrometers at RIKEN and Super Separator Spectrometer (S 3 ) at GANIL - δp/p ~ 1/14,700 - δθ ~ 1mrad - magnetic rigidity of 1.8 – 6.8 Tm - Momentum acceptance ±1% - Angular acceptance ~ 5 msr Detectors low Z thin tracking detectors and low pressure MWDC SHARAQ spectrometers at RIKEN

21. HRS/ZDS 17/23 RISP workshop ZeroDegree Spectrometer (ZDS) Forward spectrometer to study nuclear reactions and nuclear decays using the rare-isotope beams from the IF at a beam energy of ~200 MeV/A Identify the charged fragments for nuclear reaction studies at reaction station or nuclear decay studies at decay station Specs p/δp ~ 1200 – 4000 magnetic rigidity ~9 Tm Angular acceptance (vertical) ± (20-50) mrad Angular acceptance (horizontal) ± 30 mrad Momentum acceptance ~ ±3 % Detectors NaI-array DALI2 for γ-ray spectroscopy (BigRIPS) and recoil detector MUST2 at GANIL at reaction station LaBr3, DSSSD detector for β-delayed gamma-ray spectroscopy at decay station

22. EDM (Electric Dipole Moment)

23. EDM 22/23 RISP workshop Physics An EDM violates parity and time reversal If non-zero EDM exists, it indicates a new physics with CP -odd built in Standard model predicts very small EDM but too small to explain matter and anti-matter asymmetry The most stringent upper limit : ~ 3.1 x 10 -29 e cm from 199 Hg (~ 10 -33 in SM ) Atomic EDM Atomic EDM can be measured with Schiff moment Schiff moment is a net charge distribution due to an asymmetric nuclear shape and associated parity doublet nuclear states for a given T-odd N-N interaction The octupole shape atomic nuclei ** (aka pear shape from ISOLDE): strong enhancements on Schiff moment Radium, Radon and Francium for atomic EDM measurement experiment at RAON **Nature 497, 199–204 (2013).

24. EDM 22/23 RISP workshop Radium Closely spaced parity doublet Large intrinsic Schiff moment due to octupole deformation Relativistic atomic structure Laser trapping and cooling: table top and beam line Radon Very similar to Radium except no laser cooling Optical pumping to polarize and use γ-anisotropy and β asymmetry Francium electron EDM ~ highest enhancement factor Laser cooling and trap Fr production with ECR at RAON: 18/16 O + 197 Au → 207-211 Fr + Xn Radium Radon Francium

25. EDM 21/23 RISP workshop Muon EDM Surface muon → muonium production → Muon acceleration → Muon storage Laser resonant ionization of Mu (μ + e - ) J-PARC Radial tracking vanes (Silicon strip) ) μ decay vertex Positron track

26. CLFV (Charged Lepton Flavor Violation)

27. CLFV 22/23 RISP workshop Charged Lepton Flavor Violation (CLFV) Lepton flavor violation (  →eγ,  A→eA,  →eee ) has not been observed but there is no reason to be conserved in the standard model (SM) In the minimum extension of SM with a tiny mass of neutrino, CLFV is connected to a neutrino mass generation but highly suppressed (BR<10 -50 ) In many extension of the SM, CLFV is permitted to the range of BR: 10 -10 ~10 -20 CLFV search at RAON can be a very strong basic research program RAON CLFV search with  →eee SINDRUM at PSI carried out experiment 30 years ago, but can be greatly improved with new technologies Very little accidental backgrounds due to requiring of three electrons Uses surface muon: stopped at target ~10 10 with 1 % efficiency with ~10 10 muons/sec

28. CLFV 22/23 RISP workshop Muonium Oscillation at RAON A muonium atom is a Hydrogen-like bound state of  + and e - The spontaneous conversion(or oscillation) of a muonium atom(  + e - or Mu) to its antimuonium atom (  - e + or Mu) is also CLFV process since |ΔL i |=2 process Covers many ranges of new physics: mediated by a doubly charged Higgs boson, heavy Majorana neutrinos, supersymmetric τ-sneutrino or dileptonic gauge boson The total conversion probability of Mu-Mu oscillation due to any possible coupling between two:

29. Summary 23/23 RISP workshop KOBRA and LAMPS are in good shape  TDR is almost done  Detector R&D is in progress HRS/ZDS is in conceptual design stage including searching for physics topic as well  TDR is in progress EDM and CLFV are very early in conceptual design stage  Only science part will be discussed in TDR for future developments