1. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz Status and Plans for Linac and RLAs

2. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Acceleration Scheme – IDS Goals Engineering design foundation Define beamlines/lattices for all components Design lattices for transfer lines between the components Resolve physical interferences, beamline crossings etc  Floor Coordinates Carry out end-to-end tracking study  Machine Acceptance Engineer individual active elements (magnets and RF cryo modules)

3. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 0.6 GeV/pass 3.6 GeV 0.9 GeV 244 MeV 146 m 79 m 2 GeV/pass 264 m 12.6 GeV Towards Engineering Design Foundation

4. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz RLA requirements Large transverse and longitudinal acceptances Simultaneous acceleration of both  +  - species Rapid acceleration – fixed field magnets, high gradient SRF Manageable orbit separation at recirculation arcs Beam dynamics issues ‘Full bucket’ acceleration – longitudinal compression Phase slippage in the linacs Multi-pass linac optics Droplet return arc – compact lattice design and matching Chromatic corrections ‘Dogbone’ RLA – Opportunities and Challenges

5. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Linear Pre-accelerator – 244 MeV to 909 MeV 6 short cryos 15 MV/m 8 medium cryos 17 MV/m 11 long cryos 17 MV/m 1.1 Tesla solenoid 1.4 Tesla solenoid 2.4 Tesla solenoid Transverse acceptance (normalized): (2.5) 2   = 30 mm rad Longitudinal acceptance: (2.5) 2   p  z /m  c  = 150 mm

6. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Linear Pre-accelerator – 244 MeV to 909 MeV Transverse acceptance (normalized): (2.5) 2   = 30 mm rad Longitudinal acceptance: (2.5) 2   p  z /m  c  = 150 mm Longitudinal phase-space (s,  p/p) axis range: s = ±25 cm,  p/p = ±0.2

7. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Injection double-chicane      

8. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009NFMCC Collaboration Meeting, LBNL, January 27, 2009 Pre-accelerator–Chicane–Linac Matching  = 2×10 -5

9. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Multi-pass linac Optics 1-pass, 1200-1800 MeV ‘half pass’, 900-1200 MeV initial phase adv/cell 90 deg. scaling quads with energy mirror symmetric quads in the linac quad gradient

10. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Multi-pass linac Optics 2-pass, 1800-2400 MeV 3-pass, 2400-3000 MeV phase adv. diminish uniformly in both planes

11. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Multi-pass linac Optics 4-pass, 3000-3600 MeV phase adv. still larger then 180 deg. in both planes 5-pass, 3600-4200 MeV

12. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 10 cells in 2 cells out (  out =  in and  out = -  in, matched to the linacs) transition E =1.2 GeV Mirror-symmetric ‘Droplet’ Arc – Optics

13. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 ‘Droplet’ Arcs scaling – RLA I i = 1…4E i [GeV]p i /p 1 cell_outcell_inlength [m] Arc11.21 2×22×2 10130 Arc21.83/2 2×32×3 15172 Arc32.42 2×42×4 20214 Arc43.05/22×52×525256 Fixed dipole field: B i =10.5 kGauss Quadrupole strength scaled with momentum: G i = × 0.4 kGauss/cm Arc circumference increases by: (1+1+5) × 6 m = 42 m

14. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Mirror-symmetric ‘Droplet’ Arc – Optics Arc1 (E =1.2 GeV) 2 cells out 10 cells in 2 cells out 3 cells out 15 cells in 3 cells out Arc2 (E =1.8 GeV)

15. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Linac ½-to-Arc1 – Beta Match E =1.2 GeV Already matched ‘by design’ 90 0 phase adv/cell maintained across the ‘junction’ No chromatic corrections needed

16. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Linac1-to-Arc2 – Beta Match E =1.8 GeV Noticeable mis-match at the end of Linac1 ‘Matching quads’ are invoked

17. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Linac1-to-Arc2 – Beta Match E =1.8 GeV No 90 0 phase adv/cell maintained across the ‘junction’ Chromatic corrections needed

18. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Linac1-to-Arc2 – Chromatic compensation E =1.8 GeV Chromatic corrections with two pairs of sextupoles

19. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Linac1-to-Arc2 - Chromatic Corrections initial uncorrected two families of sextupoles

20. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 ‘Droplet’ Arcs scaling – RLA II i = 1…4E i [GeV]p i /p 1 cell_outcell_inlength [m] Arc14.61 2×22×2 10260 Arc26.63/2 2×32×3 15344 Arc38.62 2×42×4 20428 Arc410.65/22×52×525512 Fixed dipole field: B i = 40.3 kGauss Quadrupole strength scaled with momentum: G i = × 1.5 kGauss/cm Arc circumference increases by: (1+1+5) × 12 m = 84 m

21. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 1-pass, 4.6 -6.6 GeV RLA II - linac Optics mirror symmetric quads in the linac Quad gradient length

22. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009

23. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009

24. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Work Plan

25. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Work Plan cont.

26. Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility Alex Bogacz EUROnu Annual Meeting, CERN, March 26, 2009 Summary IDS Goals – laying engineering design foundation Define beamlines/lattices for all components Design lattices for transfer lines between the components Resolve physical interferences, beamline crossings etc  Floor Coordinates Chromatic corrections with sextupoles implemented Presently completed Optics design Pre-accelerator (244 MeV-0.9) + injection double chicane RLA I (0.9-3.6 GeV) and RLA II (3.6-12.6 GeV) 4.5 pass linac Droplet Arcs1-4 Still to do…. End-to-end simulation Engineer individual active elements (magnets and RF cryo modules) Element count and costing