08. 17. 2012 The Rare Isotope Science Project a.k.a. KoRIA IUPAP 2012 (Japan) Dong-O Jeon The Institute for Basic Science Brief History of IBS • International Science Business Belt plan (2009.1) • The Institute for Basic Science is the core facility of the ISBB plan • Under the IBS, a heavy ion accelerator facility is built – The Rare Isotope Science Project • Preliminary Design Study (2009.3 - 2010.2) • Conceptual Design study (2010.3 - 2011.2) • International Advisory Committee (2011.7) • Institute for Basic Science(IBS) established (2011.11) • Rare Isotope Science Project(RISP) launched (2011.12) • Technical Advisory Committee (2012.5) • Baseline Design Summary (2012.6) • International Advisory Committee (2012.7) Organization of the Institute for Basic Science Board of Directors Auditor Scientific Advisory Board President Accelerator Institute (Affiliated Institution) Office of Policy Planning Secretariats Rare Isotope Science Project Research Center (Headquarters) Office of Research Services Research Center (Campus) Research Center (Extramural) Office of Administrative Services IBS consists of 50 research centers, supporting organizations, and affiliated research institutes Each Research Center : ~50 staff, average annual budget ~ 9 M USD The number of staff: 3,000 (2017, including visiting scientists and students) Annual Budget: USD 610 million (2017, including operational cost for the Accelerator Institute) 4 Location Daejeon Bird Eye View of IBS Bird’s Eye View of Accelerator Facility Bird’s Eye View of Accelerator Facility Making Rare Isotope Beams ISOL(Isotope Separator On-Line) p thick target (eg. Uranium Carbide) target spallation or fission (low energy) RI Ions Reacceleration RI Beam Cyclotron Proton 70 MeV, 70 kW Driver LINAC Heavy ion e.g. U : 200MeV/u, 200 kW Stopping RI ion beam IF(In-Flight Fragmentation) Stable Heavy ion beam thin target projectile fragmentation (high energy) Stopped Beam Experiment (Traps) Fast Beam Experiment Accelerator System • Main Driver Superconducting Linac LEBT with 400 kW beam power ECR-IS ( 10keV/u, 12 pμA) RFQ (300keV/u, 9.5 pμA) • Cyclotron 70 MeV 1 mA p beam as ISOL driver MEBT • Post Accelerator to accelerate RI beams SCL1 (18.5 MeV/u, 9.5 pμA) Driver Linac Chg. Stripper SCL2 (200 MeV/u, 8.3 pμA for U+79) (600MeV, 660 μA for p) MEBT RFQ CB HRMS ISOL Target μSR, Medical Cyclotron RF Cooler (p, 70 MeV, 1mA) SCL1 (Post Acc.) IF Target IF system IF Separator Post Accelerator Atomic Trap ECR-IS ISOL system Gas Catcher Accelerator System Beam Parameters of Accelerator System Accelerator Driver Linac Post Acc. RI beam Cyclotron Particle proton U+79 proton Beam energy 600 MeV 200 MeV/u 18.5 MeV/u 70 MeV Beam current 660μA 8.3 pμA - 1 mA Power on target 400 kW 400 kW - 70 kW Driver Linac Injector LEBT ECR-IS ( 10keV/u, 12 pμA) RFQ (300keV/u, 9.5 pμA) MEBT SCL1 SCL1 (18.5 MeV/u, 9.5 pμA) • Main Driver Linac with 400 kW beam power • Accelerates from proton (600 MeV) to uranium (200 MeV/u) • Designed for high intensity beams • Send beam to the IF target or ISOL target Driver Linac Chg. Stripper SCL2 (200 MeV/u, 8.3 pμA for U+79) (600MeV, 660 μA for p) MEBT RFQ CB SCL2 HRMS ISOL Target μSR, Medical Cyclotron RF Cooler (p, 70 MeV, 1mA) SCL1 (Post Acc.) IF Target IF system IF Separator Post Accelerator Atomic Trap ECR-IS ISOL system Gas Catcher ECR Ion Source • Consists of 28 GHz RF system and superconducting magnets for high current ion beam generation • X-ray shielding required • High temp oven under design • Generating 12 pmA (U beam) Superconducting Magnet ECR-IS Ion Beam Proton to Uranium beam Extraction Energy 10 keV/u RF power 10 kW Extraction Emittance 0.1π mm-mrad Beam Current 12 puA (238U33+, 238U34+) RF Frequence 28GHz RFQ RFQ is • To accelerate ion beams from 10 keV/u to 300 keV/u • 4 m long, 81.25 MHz RFQ Input Energy 10 keV/u Output Energy 300 keV/u Input Emittance (rms) 0.12π mm-rad Frequency 81.25 MHz Input charge 33, 34 (Uranium-238) Input current 12 pμA Output current 9.5 pμA RFQ Transmission : 80.5% • • • • ex=0.12 mm-mrad, ey=0.18 mm-mrad, ez=8.2 MeV-deg @ exit of RFQ With LEBT bunchers (TRACK code) Accelerate ion beams 10 keV/u to 300 keV/u Assessing available options. Driver SCL SCL is designed • To accommodate the needs of various user groups • To accelerate high intensity beams • Nb Cavities operating at 2K • Focusing by normal conducting quad doublets • Optimized geometric beta of SC cavities (0.047, 0.12, 0.30, 0.53) • Employs larger aperture to reduce beam loss (4cm and 5 cm aperture) • Cryogenic load estimated 1.9 kW [Driver Linac 2K] + 0.35 kW [Post Acc] • Cavity geometry optimized for Epeak/Eacc , Bpeak/Eacc , R/Q, QRs Cavity Geometric Beta Optimization SSR2 SSR1 QWR HWR RISP: 0.047, 0.120, 0.30, 0.53 16 For U beam Cavity Geometry Optimized Parameters Unit QWR HWR SSR 1 SSR 2 bg - 0.047 0.12 0.30 0.53 Resonant frequency MHz 81.25 162.5 325 325 No of cavities - 24 138 88 136 Aperture diameter mm 40 40 50 50 QRs Ohm 37 47 86 108 R/Q Ohm 480 319 242 304 Vacc MV 1.02 1.07 2.04 3.53 Epeak MV/m 30 30 30 30 Bpeak mT 48 41 54 57 Epeak/Eacc 5.08 6.2 4.06 4.15 Bpeak/Eacc 9.16 8.4 7.07 8.6 Qcalc/109 - 3.6 4.6 8.1 10 Operating temperature K 2 2 2 2 P0 W 1.3 1.5 4.7 7.9 Pbeam / emA (proton) W 854 925 1440 2770 Pbeam / emA (Uranium) W 113 134 524 926 Average charge state (U) - 33.5 33.5 79 79 SCL Layout • Linac base frequency = 81.25 MHz • Design to accelerate high intensity ion beams • Flexile operation to meet the needs of various user groups SC Cavity QWR1 1m QWR Focusing solenoids QWR2 18 HWR1 Driver SCL Design Previous with SC solenoids SC cavity NC quadrupole beam box HWR Driver SCL with NC doublets SCL Layout NC quadrupole lattice option has the following merits: 1. Accurate alignment < 150 mm of NC quadrupoles is straightforward. 2. Beam quality control is straightforward and design is more adequate for high power beam operation. 3. Advantages in beam diagnostics and collimation through beam boxes. 4. The linac cost seems to be in error range compared with the SC solenoid option. ( removal of costly SC solenoids) 5. Preliminary cryo-load comparison suggests that overall cryo-load difference is small compared with the dynamic load. SCL Layout • Present SCL layout provides good beam diagnostics configuration for machine tuning. • Necessary beam diagnostics can be installed at beam boxes. • Also provides good beam loss collimation configuration, improving beam quality for users, reducing beam loss. Beam Beam loss cryomodule quadrupole beam box collimator SCL Layout [1 QWR + 1 QD] x 24 SCL1 [3 HWR + 1 QD] x 14 [6 HWR + 1 QD] x 16 [4 SSR + 1 QD] x 22 SCL2 beam box example (courtesy of SPIRAL2) [8 SSR + 1 QD] x 17 SCL SCL1 SCL2 Cavity structure Frequency βg Number of cavities Output energy QWR 81.25 MHz 0.047 24 2.5 MeV/u (U+33) HWR 162.5 MHz 0.12 138 18.6 MeV/u (U+33) SSR 325 MHz 0.30 88 71 MeV/u (U+79) SSR 325 MHz 0.53 136 200 MeV/u (U+79) SCL machine tolerance (Driver SCL, Post SCL) Machine imperfections for actual accelerator Parameters SCRF Cavity Warm Quadrupole SC Solenoid Displacement (mm) ±1 ±0.15 ±0.5 Uniform - ±5 - Uniform Phase (deg) ±1 - - 3σ Gaussian Amplitude (%) ±1 - - 3σ Gaussian Rotation (mrad) Distribution • Preliminary study is done. • Further studies on machine tolerances will be done. SCL machine tolerance Max. envelope Centroid Emittance 76% increase 10% increase baseline 350% increase 130% increase solenoid The shade region represents the bounds of envelope, centroid and emittance due to misalignment and field errors. The aperture of quadrupole and solenoid is 4 cm. Cyclotron LEBT ECR-IS ( 10keV/u, 12 pμA) RFQ (300keV/u, 9.5 pμA) MEBT SCL1 (18.5 MeV/u, 9.5 pμA) • Cyclotron – 70 MeV, 1 mA, proton beam • Supports CW and pulsed beam • Pulsed beam by fast chopping system • Driver for the ISOL target • Will be procured through bidding Driver Linac Chg. Stripper SCL2 (200 MeV/u, 8.3 pμA for U+79) (600MeV, 660 μA for p) MEBT RFQ CB Cyclotron HRMS ISOL Target μSR, Medical Cyclotron RF Cooler (p, 70 MeV, 1mA) SCL1 (Post Acc.) IF Target IF system IF Separator Post Accelerator Atomic Trap ECR-IS ISOL system Gas Catcher Post-Accelerator System LEBT ECR-IS ( 10keV/u, 12 pμA) RFQ (300keV/u, 9.5 pμA) MEBT SCL1 (18.5 MeV/u, 9.5 pμA) Driver Linac CS • Accelerates RI beams from the ISOL system up to 18.5 MeV/u and RI beam can be injected to SCL2 to higher energy • Consists of charge breeder, RFQ, MEBT, superconducting linac etc. • High beam quality required • Adopts the same SCL layout SCL2 (200 MeV/u, 8.3 pμA for U+79) (600MeV, 660 μA for p) MEBT RFQ CB HRMS ISOL Target μSR, Medical Cyclotron RF Cooler (p, 70 MeV, 1mA) SCL1 (Post Acc.) IF Target IF system IF Separator Post Accelerator Atomic Trap ECR-IS ISOL system Gas Catcher Design of IF Separator Pre-separator: S-shape Main separator: C-shape Max. magnetic rigidity= 8 Tm W. Wan, J. Kim, Cyclotron Conf. 2010 Beam Optics of Pre-Separator Horizontal Beam Shielding Wedge dump Vertical p/p= 1.5% Aberrations up to 7th order Calculated with TURTLE e= 4 mm mrad p/p = 5 % Schedule • SAR (Safety Analysis Report) Review is a critical path to accelerator system installation and commissioning. • Rather optimistic schedule for SAR Review process is assumed. • Accelerator tunnel construction begins Feb/01/2016. • Installation of accelerators will begin Jul/01/2016. Schedule Schedule • Very tight installation and commissioning schedule to meet the 2017 completion Organization Chart Rare Isotope Science Project Kim, Sun Kee Recruiting on-going Accelerator Sys. Division Jeon, Dong-O SCL Team Kim, Hyung Jin (leader) Jung, Hoe Chun Lee, Jung Han Choi, Chul Jin Joo, Jong Dae Experimental Sys. Division Kim, Yong Kyun IF ∙ RF Team Kim, Jong Won (leader) Han, Jae Eun Kim, Mi Jung Kim, Do Gyun Kim, Myeong Jin Song, Jeong Seog Kim, Seong Jun Injector ∙ Beam Phy Team Hong, In Seok (leader) Kim, Byoung Chul Choi, Bong Hyuk Seo, Chang Seok Kim, Hye Jin Jang, Si Won Hwang, Ji Gwang Bang, Jung Bae Man-power Plan Recruiting Plan for young scientists and engineers 2012 2013 2014 2015 2016 Total / engineers 20 20 12 10 8 70 Budget (\100M) 10 10 6 5 4 35 Young scientists Project-wise Man-power Plan 2011 2012 2013 2014 2015 2016 2017 Regular 1 33 50 116 130 140 150 (Termed) (0) (39) (50) (50) (50) (50) (50) Summary • Previous conceptual design was reviewed / assessed and design changes are made (reflected in Baseline Design Summary). • The RISP is phasing into technical design stage. • Schedule and Cost are being evaluated. • Having developed man-power plan to support the schedule. • We are getting ready for the construction of the SRF Test Facility. • International Collaboration is an important part for the success of the project. Thanks for Your Attention!