PreBooster Redesign Alex Bogacz Thomas Jefferson National Accelerator

Pre-Booster Re-design Alex Bogacz Thomas Jefferson National Accelerator Facility Operated by JSA for the U. S. Department of Energy Alex Bogacz November 6, 2014 1

Pre-Booster - Present Design Ekin = 285 Me. V – 3 Ge. V Ring circumference: 234 m Crossing angle: 75 deg. 0 -6 DISP_X&Y[m] BETA_X&Y[m] 30 6 B. Erdelyi 0 BETA_X BETA_Y DISP_X Inj. Arc (2550 ) DISP_Y 233. 528 Straight Arc (2550 ) Straight Thomas Jefferson National Accelerator Facility Operated by JSA for the U. S. Department of Energy Alex Bogacz November 6, 2014 2

Pre-Booster 8 Ge. V 0 -6 DISP_X&Y[m] BETA_X&Y[m] 30 6 Ekin = 7. 062 Ge. V 0 BETA_X BETA_Y DISP_X Inj. Arc (FODO) DISP_Y 233. 528 Straight (Triplet) Arc Dipoles: Arc (FODO) 3× 3× 1200 FODO cells Straight (Triplet) Lb = 222 cm B = 2. 945 Tesla Straight Quads: bend ang. = 14. 134 deg. Lq = 40 cm GF = 12. 57 Tesla/m Arc Quadrupoles: GD = -24. 52 Tesla/m Lq = 40 cm GF = 12. 57 Tesla/m GF = 31. 4 Tesla/m GD = -31. 4 Tesla/m Thomas Jefferson National Accelerator Facility Operated by JSA for the U. S. Department of Energy Alex Bogacz November 6, 2014 3

Pre-Booster - gt 0 -6 DISP_X&Y[m] BETA_X&Y[m] 30 6 gt = 5 0 BETA_X BETA_Y DISP_X DISP_Y 233. 528 gt = 5 gt = 10 Thomas Jefferson National Accelerator Facility Operated by JSA for the U. S. Department of Energy Alex Bogacz November 6, 2014 4

Perturbed FODO? 0 -2. 2 DISP_X&Y[m] BETA_X&Y[m] 4 x FODO (4 x 900 = 3600) 2. 2 60 M 56 = 39. 6 cm 0 BETA_X BETA_Y DISP_X DISP_Y 48. 4759 Dfx, y = 1800 2. 2 60 DGF = 0. 36 x GF 0 -2. 2 DISP_X&Y[m] BETA_X&Y[m] M 56 = 14. 4 cm 0 BETA_X BETA_Y DISP_X DISP_Y 48. 4759 Thomas Jefferson National Accelerator Facility Operated by JSA for the U. S. Department of Energy Alex Bogacz November 6, 2014 5

DISP_X&Y[m] = 3600) M 56 = 39. 6 cm ⇨ gt = 14. 5 0 (3 x 1200 -5 3 x FODO BETA_X&Y[m] 30 5 Perturbed 1200 -FODO? 0 BETA_X DGF 2 BETA_Y DISP_X DISP_Y Dfx, y = 1200 DGF 1 21. 7214 Dfx, y = 1200 DGF 2 No other achromatic solution (with substantially lower M 56) Thomas Jefferson National Accelerator Facility Operated by JSA for the U. S. Department of Energy Alex Bogacz November 6, 2014 6

Inj. Arc Re-design ‘Old’ Design 60 6 (M 56 = 434. 7 cm ) 0 -6 DISP_X&Y[m] BETA_X&Y[m] Qx = 2. 845 Qy = 2. 837 0 BETA_X BETA_Y DISP_X DISP_Y 74. 1641 ‘New’ Design 60 6 (M 56 = 167. 6 cm ) 0 -6 DISP_X&Y[m] BETA_X&Y[m] Qx = 3. 999 Qy = 3. 211 0 BETA_X BETA_Y DISP_X DISP_Y 74. 1641 Thomas Jefferson National Accelerator Facility Operated by JSA for the U. S. Department of Energy Alex Bogacz November 6, 2014 7

Arc Re-design ‘Old’ Design 0 -5 Qx = 2. 845 Qy = 2. 764 0 DISP_X&Y[m] BETA_X&Y[m] 60 5 (M 56 = 466. 5 cm ) BETA_X BETA_Y DISP_X DISP_Y 3 x FODO (1200 ) 60 5 3 x FODO (1200 ) 63. 7641 ‘New’ Design 0 -5 Qx = 3. 121 Qy = 2. 723 0 DISP_X&Y[m] BETA_X&Y[m] (M 56 = 66. 0 cm ) BETA_X BETA_Y DISP_X DISP_Y 63. 7641 Thomas Jefferson National Accelerator Facility Operated by JSA for the U. S. Department of Energy Alex Bogacz November 6, 2014 8

60 6 Pre-Booster ‘New’ Design (8 Ge. V, gt = 10) ‘Old’ Design, gt = 5 0 -6 DISP_X&Y[m] BETA_X&Y[m] (M 56 = 901. 2 cm ) 0 BETA_X BETA_Y DISP_X DISP_Y Inj. Arc 233. 528 Arc Straight 60 6 Straight ‘New’ Design, gt = 10 0 -6 DISP_X&Y[m] BETA_X&Y[m] (M 56 = 225. 3 cm ) 0 BETA_X BETA_Y DISP_X DISP_Y 233. 528 Thomas Jefferson National Accelerator Facility Operated by JSA for the U. S. Department of Energy Alex Bogacz November 6, 2014 9

Summary 8 Ge. V Pre-Booster Design with gt =10 Proposed design based on the original 3 Ge. V lattice (gt = 5): Re-design of Arc optics within the original magnet layout Low momentum compaction Optics (factor of 4 smaller) Preserving the ‘High Dispersion’ injection insert Moderate increase of betas (25 -40 meter) Moderate increase of quad strength ( 40 -50 Tesla/m) Unaltered dipoles (2. 9 Tesla) Beam sizes at injection? Injection Energy? Thomas Jefferson National Accelerator Facility Operated by JSA for the U. S. Department of Energy Alex Bogacz November 6, 2014 10