Status of RAON and LAMPS in Korea

Transcription

1 7 th International Symposium on Nuclear Symmetry Energy (NuSYM2017) GANIL, Caen, France, September 4-7, 2017 Status of RAON and LAMPS in Korea Byungsik Hong (Korea University) September 4-7, 2017 GANIL 1

2 Location of RAON Complex RAON: Rare isotope Accelerator complex for ON-line experiments ~11 km Current RISP Office September 4-7, 2017 GANIL 2

3 Site Plan Bird s eye view Basic design was finished in Dec A construction company was selected in Sept September 4-7, 2017 GANIL 3

4 Site Preparation Construction and civil engineering for RAON has begun. The ground breaking for accelerators and experimental buildings was done on Feb. 13 th this year. Total area: 952,066 m 2 September 4-7, 2017 GANIL 4

5 Layout of RAON RISP 4.6 Neutron Science Facility Project period: Dec ~ Dec Scope: Accelerator Facility, Buildings & Utilities Budget: Total ~U$ 1.43 B Accelerator and Expt. Facility: ~U$ 0.46 B Building & Utility: ~U$ 0.97 B (including the land cost) Host: Ministry of Science, ICT and Future Planning (MSIP) RISP 4.3 High-precision Mass Measurement Facility RISP 4.4 Collinear Laser Spectroscopy High Energy Expt. Bldg. (B) RISP 4.7 Bio-medical Research Facility Low Energy Expt. Bldg. RISP 3.2 ISOL Facility RISP 4.1 Recoil Spectrometer (KOBRA) RISP 4.2 High Energy Expt. Bldg. (A) Large Acceptance Spectrometer RISP 3.3 IF Facility RISP 4.5 µ-sr September 4-7, 2017 GANIL 5

6 Layout of RAON Driver Linac Post Acc. Cyclotron Particle H + O +8 Xe +54 U +79 RI beam proton Energy (MeV/u) RISP 4.6 Neutron Science Facility Current (pμa) Power (kw) > RISP 4.3 High-precision Mass Measurement Facility RISP 4.4 Collinear Laser Spectroscopy High Energy Expt. Bldg. (B) RISP 4.7 Bio-medical Research Facility Low Energy Expt. Bldg. RISP 3.2 ISOL Facility RISP 4.1 Recoil Spectrometer (KOBRA) RISP 4.2 High Energy Expt. Bldg. (A) Large Acceptance Spectrometer RISP 3.3 IF Facility RISP 4.5 µ-sr September 4-7, 2017 GANIL 6

7 Expected RIBs at RAON 90 IFS: 238 U(200 Mev/u, 400 kw) + C 80 KOBRA: 40 Ar(30 MeV/u,12 kw) + Be Stable line Number of Proton (Z) ISOL: p(70 MeV, 70 kw)+uc x ISOL+IF: 140 Xe(222 MeV/u, 1E+07 pps)+ C KOBRA ISOL ZZ = NN Z=N <1 pps ISOL+IF Number of Neutron (N) September 4-7, 2017 GANIL 7 IFS IF KOBRA ISOL ISOL+IF 1.0E E E+11 1E E E E+10 1E E E E+09 1E E E E+08 1E E E E+07 1E E E E+06 1E E E E E E E+04 1E E E E+03 1E E E E+02 1E E E E+01 1E E E E+00 1E-10 RAON aims to provide an access to unexplored regions of nuclear chart.

8 Accelerator Systems SCL2(SSR1) SCL2(SSR2) Injector SCL1(QWR) SCL1(HWR) Bending Section Cyclotron IF System September 4-7, 2017 GANIL 8

9 Prototypes of Accelerator Components 28 GHz ECR Ion Source RFQ HTS Q-magnet QWR SC Cavity & its Cryomodule HWR SC Cavity & its Cryomodule SSR SC Cavity and its Cryomodule September 4-7, 2017 GANIL 9

10 Experimental Systems Neutron Facility HPMMS CLS Bio-medical facility Ultra-low Expt. Bldg. High Energy Expt. Bldg. (B) Low Energy Expt. Bldg. µsr KOBRA LAMPS High Energy Expt. Bldg. (A) September 4-7, 2017 GANIL 10

11 Prototypes of Experimental Systems LASER for collinear laser spectroscopy β-detection system for µsr Gamma array Time Projection Chamber ISOL beam diagnostics Beam-tracking detector (PPAC) ISOL target September 4-7, 2017 GANIL 11

12 Major Milestones System Prototype development Accelerator and Experimental System Installation and Commissioning Basic Design ECR Beam ISOL SI Beam ( 15.12) Site Building Civil Construction Tendering Process Detail Design SCL Demo Beam ( 17.12) Utility Supply ( 18.9) DAY-1 Expt. ( 20.7) ISOL RI Beam ( 20.12) IF RI Beam ( 21.12) Milestones in 2017 Cryomodule test for QWR and HWR Mass production Beam extraction from SCL demo (1 QWR) Cavity test for SSR Cryomodule test in early 2018 Construction / Facility Inspection/ Safety Management Radiation Safety Approved by KINS September 4-7, 2017 GANIL 12

13 LAMPS: Large-Acceptnce MultiPurpose Spectrometer September 4-7, 2017 GANIL 13

14 Location of LAMPS ECR (RAON) SCL1 SCL2 ISOL SCL3 ECR Si-CsI Neutron array September 4-7, 2017 GANIL 14

15 Location of LAMPS ECR (RAON) Ion beams to IF target via SCL1+SCL2 SCL1 SCL2 RIB to IF target via ISOL+SCL3+SCL2 ISOL SCL3 ECR September 4-7, 2017 GANIL 15

16 Time Projection Chamber η=-0.7 (127 o ) η=1.6 (24 o ) 400 mm Target 150 mm 500 mm 300 mm 900 mm One central Au+Au event at 250 AMeV (IQMD) September 4-7, 2017 GANIL 16

17 Prototype TPC: Design Half-dimension prototype TPC Outer field cage Triple GEM Cathode PAD 150 mm Inner field cage 490 mm September 4-7, 2017 Bottom Al 진도관리 frame NuSYM2017 중간평가 for (LAMPS) GANIL & GEM 17 17

18 Prototype TPC: Components [Readout Pads] Tested pads with the two different dimensions 3 10 mm 2 : 357 Ch./Oct mm 2 : 175 Ch./Oct. Multi-layer PCB board [GEM Foil] Trapezoidal shape Thickness: 75 µm Area: mm 2 Triple layers for each plane [Field Cage] 35 µm thick and 2 mm wide Cu strips 500 µm gap between adjacent strips Mirror strips on the back 1 MΩ resistors with 0.1% var. TPC body: G10 + Aramid honeycomb September 4-7, 2017 GANIL 18

19 Prototype TPC: Assembly Inner Field Cage installed Outer Field Cage installed Prototype TPC assembled Prototype TPC: back September 4-7, 2017 GANIL 19

20 Prototype TPC: Test at ELPH ELPH: Research Center for Electron Photon Science at Tohoku University, Japan Dates: November 1-2, 2016 Beams: ee + beams at 500 MeV Gas: Ar(90%)+CH 4 (10%) (P10) Ar(90%)+CO 2 (10%) (ArCO 2 ) Purpose: To study the detailed characteristics, such as vv dddddddddd, diffusion and σσ xx, of LAMPS TPC September 4-7, 2017 GANIL 20

21 Prototype TPC: Event Displays September 4-7, 2017 GANIL 21

22 Prototype TPC: Drift Velocity Preliminary vv dddddddddd 5.3 cm/μμs for P10: Maximum distance: 512 timing bins 0.04 μμs bin 5 cm μμs 100 cm Tested P20 with cosmic muons: vv dddddddddd > 6 cm/μμs that will be suitable for LAMPS TPC if read out from only one endcap side. September 4-7, 2017 GANIL 22

23 Prototype TPC: Diffusion Preliminary 2 σσ tttttttttt = DD 2 2 zz + σσ 0 where zz: drift length σσ tttttttttt : width of hit distributions w.r.t. the fitted track DD: diffusion coefficient σσ 0 : coefficient depending on the amplification system September 4-7, 2017 GANIL 23

24 Prototype TPC: Position Resolution P10 σσ = mmmm Preliminary P10 σσ = mmmm September 4-7, 2017 GANIL 24

25 Neutron Detector Array veto Dimensions of each scintillation bar: cm 3 Construction of the real-size prototype detectors and test of their performances using Radiation-source test: 60 Co and 252 Cf Neutron-beam test at RCNP, Japan September 4-7, 2017 GANIL 25

26 NDA: Results from Source Test γ n 252 Cf Watt spectrum: dddd dddd ee aaaa sinh aa=0.88 MeV -1 and bb=2.0 MeV -1 B. Watt, Physical Review 87, 1037 (1952) September 4-7, 2017 GANIL 26 bbbb

27 NDA: Beam Test at RCNP E479 approved in B-PAC in March 2016 Date: May 29, 2016 (Visited RCNP for May 22 June 2) Beam specifications Protons on Li production target (p+ 7 Li n + 7 Be) Neutron energies: 65 and 392 MeV in N0 beamline 10 na flux 1/9 chopping Background neutron above 3MeV is less than1% [NIMA629, 43 (2011)] Chopping signals Neutron flux: n sr μμc 2 stations with 2 1 veto layer September 4-7, 2017 GANIL 27

28 NDA: RCNP-E479 D2 D1 D6 D5 D4 D3 Distance from target to the detector: 15 m Gap between stations: 60 cm Dim. of each S1 detector: cm 3 Dim. of each S2 detector: cm 3 Beam size at S1: cm 2 September 4-7, 2017 GANIL 28

29 NDA: Energy Resolution for Neutrons Preliminary 392 MeV Time resolution: Δtt = Δττ 2 + Δxx vv 2 = 0.66 ns where Δττ = FWHM of γγ peak = 0.60 ns Δxx = effective thickness of the detector = (Total thinness of Li target, veto, and neutron detector)/2 = 6.0 cm vv = neutron velocity = 21.3 cm/ns Neutron energy resolution: ΔEE Δtt = γγ γγ + 1 = 3.2% EE tt where Lorentz γγ = 1 + EE mmcc 2 = 1.42 tt = 70.4 ns Energy resolution (FWHM/EE)= 3.3 % September 4-7, 2017 GANIL 29

30 NDA: Position Resolution for Neutrons & Cosmics Preliminary 392 MeV Hit position difference between DDD For neutron and DD2 for neutrons: beams Δxx SSS xx DDD xx DDD for 10 MeV threshold and δδtt < 3 ns Relative position resolution for neutrons for one bar: Δxx SSS (m) σσ nn = σσ Δxx SSS 2 = 3.1 cm For cosmic muons Δxx SSS (m) Position difference between the projected hit position and the hit position for DD3 for cosmic muons: Δxx SSS xx DD3,pppppppp xx DD3,hiiii Relative position resolution for cosmic muons for one bar: σσ μμ = σσ Δxx SSS 1.87 = 3.1 cm September 4-7, 2017 GANIL 30

31 Summary Rare Isotope Science Project (RISP) at IBS, Korea is moving forward. The construction and civil engineering for RAON has begun: The ground breaking for accelerators and experimental buildings was done on Feb. 13 th this year. LAMPS is a dedicated spectrometer for nuclear symmetry energy at RAON. Performance tests of the prototype TPC and the neutron-detector-array modules with accelerator beams were done, and we are analyzing the data. September 4-7, 2017 GANIL 31