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The Rare Isotope Science Project a.k.a. KoRIA IUPAP 2012 (Japan)

This article provides a brief history and overview of The Rare Isotope Science Project, also known as KoRIAIUPAP, highlighting its development, organization, and key research centers. It also discusses the accelerator system and beam parameters of the project.

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The Rare Isotope Science Project a.k.a. KoRIA IUPAP 2012 (Japan)

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  1. The Rare Isotope Science Projecta.k.a. KoRIAIUPAP 2012 (Japan) 08. 17. 2012 Dong-O Jeon The Institute for Basic Science

  2. BriefHistory 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)

  3. Organization of the Institute for Basic Science Board of Directors Scientific Advisory Board Auditor President • Office of • Policy Planning Accelerator Institute (Affiliated Institution) Secretariats Rare Isotope Science Project Office of Research 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) Research Center (Headquarters) Research Center (Campus) Research Center (Extramural) • Office of Administrative Services 4

  4. Location Daejeon

  5. Bird Eye View of IBS

  6. Bird’s Eye View of Accelerator Facility

  7. Bird’s Eye View of Accelerator Facility

  8. Making Rare Isotope Beams ISOL(Isotope Separator On-Line) p  thick target (eg. Uranium Carbide)  target spallation or fission (low energy) Reacceleration RI Ions RI Beam Cyclotron Proton 70 MeV, 70 kW Driver LINAC Heavy ion e.g. U : 200MeV/u, 200 kW Stopping Stopped Beam Experiment (Traps) RI ion beam Fast Beam Experiment IF(In-Flight Fragmentation) Stable Heavy ion beam  thin target  projectile fragmentation (high energy)

  9. Accelerator System LEBT ECR-IS ( 10keV/u, 12 pμA) • Main Driver Superconducting Linac with 400 kW beam power • Cyclotron 70 MeV 1 mA p beam as ISOL driver • Post Accelerator to accelerate RI beams RFQ (300keV/u, 9.5 pμA) MEBT SCL1 (18.5 MeV/u, 9.5 pμA) Driver Linac SCL2 (200 MeV/u, 8.3 pμA for U+79) (600MeV, 660 μA for p) Chg. Stripper ISOL Target μSR, Medical HRMS CB RFQ MEBT IF Target Cyclotron (p, 70 MeV, 1mA) IF system SCL1 (Post Acc.) RF Cooler IF Separator Post Accelerator Atomic Trap ECR-IS ISOL system Gas Catcher

  10. Accelerator System Beam Parameters of Accelerator System

  11. Driver Linac LEBT ECR-IS ( 10keV/u, 12 pμA) Injector • 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 RFQ (300keV/u, 9.5 pμA) MEBT SCL1 (18.5 MeV/u, 9.5 pμA) SCL1 Driver Linac SCL2 (200 MeV/u, 8.3 pμA for U+79) (600MeV, 660 μA for p) Chg. Stripper SCL2 ISOL Target μSR, Medical HRMS CB RFQ MEBT IF Target Cyclotron (p, 70 MeV, 1mA) IF system SCL1 (Post Acc.) RF Cooler IF Separator Post Accelerator Atomic Trap ECR-IS ISOL system Gas Catcher

  12. 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

  13. RFQ • RFQ is • To accelerate ion beams from 10 keV/u to 300 keV/u • 4 m long, 81.25 MHz

  14. 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.

  15. 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

  16. Cavity Geometric Beta Optimization SSR2 SSR1 For U beam HWR QWR RISP: 0.047, 0.120, 0.30, 0.53 16

  17. Cavity Geometry Optimized

  18. 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 QWR SC cavity NC quadrupole beam box HWR Previous Driver SCL Design with SC solenoids Driver SCL with NC doublets 18

  19. SCL Layout NC quadrupole lattice option has the following merits: • Accurate alignment < 150 mm of NC quadrupoles is straightforward. • Beam quality control isstraightforward and design is more adequate for high power beam operation. • Advantages in beam diagnostics and collimation through beam boxes. • Thelinac cost seems to be in error range compared with the SC solenoid option. ( removal of costly SC solenoids) • Preliminary cryo-load comparison suggests that overall cryo-load difference is small compared with the dynamic load.

  20. 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 beam box cryomodule quadrupole collimator

  21. SCL Layout [1 QWR + 1 QD] x 24 SCL1 [3 HWR + 1 QD] x 14 [6 HWR + 1 QD] x 16 beam box example (courtesy of SPIRAL2) [4 SSR + 1 QD] x 22 SCL2 [8 SSR + 1 QD] x 17

  22. SCL machine tolerance (Driver SCL, Post SCL) • Preliminary study is done. • Further studies on machine tolerances will be done. Machine imperfections for actual accelerator

  23. 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.

  24. Cyclotron LEBT ECR-IS ( 10keV/u, 12 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 RFQ (300keV/u, 9.5 pμA) MEBT SCL1 (18.5 MeV/u, 9.5 pμA) Driver Linac SCL2 (200 MeV/u, 8.3 pμA for U+79) (600MeV, 660 μA for p) Chg. Stripper ISOL Target μSR, Medical Cyclotron HRMS CB RFQ MEBT IF Target Cyclotron (p, 70 MeV, 1mA) IF system SCL1 (Post Acc.) RF Cooler IF Separator Post Accelerator Atomic Trap ECR-IS ISOL system Gas Catcher

  25. Post-Accelerator System LEBT • 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 ECR-IS ( 10keV/u, 12 pμA) RFQ (300keV/u, 9.5 pμA) MEBT SCL1 (18.5 MeV/u, 9.5 pμA) Driver Linac CS SCL2 (200 MeV/u, 8.3 pμA for U+79) (600MeV, 660 μA for p) ISOL Target μSR, Medical HRMS CB RFQ MEBT IF Target Cyclotron (p, 70 MeV, 1mA) IF system SCL1 (Post Acc.) RF Cooler IF Separator Post Accelerator Atomic Trap ECR-IS ISOL system Gas Catcher

  26. Design of IF Separator Pre-separator: S-shape Main separator: C-shape Max. magnetic rigidity= 8 Tm W. Wan, J. Kim, Cyclotron Conf. 2010

  27. Beam Optics of Pre-Separator Shielding Beam dump Wedge Horizontal Vertical Calculated with TURTLE = 4  mm mrad p/p =  5 % p/p= 1.5% Aberrations up to 7thorder

  28. 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.

  29. Schedule

  30. Schedule • Very tight installation and commissioning schedule to meet the 2017 completion

  31. Organization Chart Rare Isotope Science Project Kim, Sun Kee Recruiting on-going Experimental Sys. Division Kim, Yong Kyun Accelerator Sys. Division Jeon, Dong-O IF ∙ RF Team Kim, Jong Won (leader) Han, Jae Eun Kim, Mi Jung Kim, Do Gyun Kim, Myeong Jin Song, JeongSeog Kim, Seong Jun Injector ∙ Beam Phy Team Hong, In Seok (leader) Kim, ByoungChul Choi, Bong Hyuk Seo, Chang Seok Kim, Hye Jin Jang, Si Won Hwang, JiGwang Bang, Jung Bae SCL Team Kim, HyungJin (leader) Jung, Hoe Chun Lee, Jung Han Choi, Chul Jin Joo, Jong Dae

  32. Man-power Plan Recruiting Plan for young scientists and engineers Project-wise Man-power Plan

  33. 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.

  34. Thanks for Your Attention!

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