1. Large Ion Booster Re-design Update
Alex Bogacz
August 7, 2014

2. Large Ion Booster - gt Ekin = 3 – 20 GeV g = 4.12 – 22.32 gt = 24
total ring circumference: ≈1420 m
60 deg. crossing
Ekin = 3 – 20 GeV
g = 4.12 – 22.32
gt = 24
August 7, 2014

3. Large Ion Booster - Footprint
2400 Arc:
13.20
213.60
Electron Ring
Arc bend:
Cell length: m
Number of cells: 18
Spin rotators: 2x13.20
Ion Booster Ring
Arc bend:
Cell length: m
Number of inner cells: 28 = 7x4
Number of outer cells: 2x4
bend/inner cell: 7.630
bend/outer cell: 3.30
August 7, 2014

4. Periodic 900-FODO Cell E = 20 GeV phase adv/cell: Dfx,y= 900
12.12 30 2 -2
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
12.12 90
PHASE_X&Y [deg]
Q_X
Q_Y
phase adv/cell: Dfx,y= 900
Drifts : 4x130 cm
Arc Dipole:
Lb = 300 cm
B = 1.55 Tesla
bend ang. = deg.
Arc Quadrupoles:
Lq = 45 cm
GF = 37.1 Tesla/m
GD = Tesla/m
August 7, 2014

5. Perturbed 900-FODO 4 x FODO DGF = 0.2 x GF M56 = 14.5 cm ⇨ gt = 24.0
Dfx,y = 1800 60
2.2
-2.2
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
M56 = 39.6 cm ⇨ gt = 14.5
4 x FODO
(4 x 900 = 3600)
DGF = 0.2 x GF 60
2.2
-2.2
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
M56 = 21.6 cm ⇨ gt = 19.6
August 7, 2014

6. Perturbed 900-FODO 4 x FODO DGF = 0.36 x GF M56 = 14.5 cm ⇨ gt = 24.0
Dfx,y = 1800 60
2.2
-2.2
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
M56 = 39.6 cm ⇨ gt = 14.5
4 x FODO
(4 x 900 = 3600)
DGF = 0.36 x GF 60
2.2
-2.2
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
M56 = 14.4 cm ⇨ gt = 24.2
August 7, 2014

7. Super-Cell Based on 900-FODO 60 2 -2
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
Tunes: Qx ≈1.3, Qy ≈ 0.6
DQx ≈ 0.5
DQy ≈ 0.5
QF0
QD1
QF1
QD0
Chromaticity:
xx = -2.24
xy = -1.45
Super-Cell Quads:
Lq = 45 cm
GF0 = 38.9 T/m
GD0 = T/m
GF1 = 53.7T/m
GD1 = T/m
900- FODO Quads:
Lq = 45 cm
GF = 37.1 T/m
GD = T/m
Lq = 60 cm
GF1 = 40.2 T/m
Lq = 30 cm
GF1 = 40.2 T/m
2 x
August 7, 2014

8. ‘Dressed’ Super-Cell August 7, 2014 QD0 Sext2 QF1 Sext1 QD1 QF0 QD160 2
BETA_X&Y[m]
DISP_X&Y[m] -2
BETA_X
BETA_Y
DISP_X
DISP_Y
QD0
Sext2
QF1
Sext1
QD1
QF0
QD1
QF1
Sext1
QD0
Sext2
QF0
August 7, 2014

9. Super-Cell Beam Envelope at 10s
QF0
QD1
QF1
QD0
2.5
Size_X[cm]
Size_Y[cm]
Ax_bet
Ay_bet
Ax_disp
Ay_disp
E = 3 GeV
x,y = 49 m
g = 4.1
eN_rms = 4 mm mrad
sx,y = 2 mm
bore radius: 25 mm
Quad grad: 40 T/m
Pole tip field: 1 T
August 7, 2014

10. ‘Inner/Outer’ Super-Cells
Inner Super-Cell
(dipole bend ang. = )
Outer Super-Cell
(dipole bend ang. = 1.650) 60 2 -2
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X 60 2 -2
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
short bends: 150 cm
August 7, 2014

11. Inner Arc: 7 x Inner S-Cell
2400 Arc Optics 60
BETA_X&Y[m]
Outer S-Cell 13.20 2 -2
DISP_X&Y[m]
Outer S-Cell
13.20
BETA_X
BETA_Y
DISP_X
Inner Arc: 7 x Inner S-Cell
213.60
August 7, 2014

12. Arc-to-Straight FODO Arc Straight Quads: Lq = 40 cm GF = 20.6 T/m
518
240 60 2 -2
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
Arc
Straight 60 5
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
Quads:
Lq = 40 cm
GF = 20.6 T/m
GD = T/m
August 7, 2014

13. Summary – Magnet count Segment Magnet Number Length [cm] Strength Arcs
bend1
112
300
1.5 Tesla
bend2 32
0.7 Tesla
quad1
106 45
20-40 T/m
quad2 72 30
42 T/m
sextupole 15
Straights
quad 48
26-43 T/m
August 7, 2014