1. Booster to Ion Ring Transfer Line
Alex Bogacz
with
T. Satogata and V. Morozov
November 13, 2014

2. Layout 12 GeV CEBAF EIC MEIC Collider Rings IP Booster SRF Linac
Ion Source
Booster
MEIC
Collider
Rings
EIC
12 GeV CEBAF
Halls A, B, C
Electron Injector
Hall D
SRF Linac
Booster crossing angle: 750
Transfer Line net bend angle: ½ 750 =
November 13, 2014

3. Booster (8 GeV, gt = 10) Ekin = 285 MeV – 8 GeV
Ring circumference: 234 m
Crossing angle: 75 deg. 60 6 -6
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
Inj. Arc (2550 )
Straight
Arc (2550 )
Straight
November 13, 2014

4. Horizontal Extraction: Kicker + Septum
FODO (1200 )
57.803 30 2 -2
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
kicker
septum
Arc
septum
kicker
5.5 2 -2
Coordinates X&Y[cm] X Y
Kicker: L[cm] B[kG] Def. Ang [mrad]
Rise time [ns] Flat Top [ns] Fall time [ns]
November 13, 2014

5. Horizontal Extraction: Transfer Line
FODO (1200 )
57.803 30 2 -2
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
kicker
septum
Arc
septum
kicker
Arc Dipoles:
Lb = 222 cm
B = Tesla
bend ang. = deg.
Arc Quadrupoles:
Lq = 40 cm
GF = 31.4 Tesla/m
GD = Tesla/m
November 13, 2014

6. Horizontal Extraction: Transfer Line
57.803 60 4 -4
BETA_X&Y[m]
DISP_X&Y[m]
BETA_X
BETA_Y
DISP_X
DISP_Y
kicker
septum
septum
kicker
Ion Ring Injection (FODO)
Booster Extraction (Triplet)
November 13, 2014

7. Beam Envelopes at 6s - Magnet Apertures
E = 8 GeV
57.803
2.5
Size_X[cm]
Size_Y[cm]
Ax_bet
Ay_bet
Ax_disp
Ay_disp
kicker
septum
septum
kicker
Ion Ring Injection (FODO)
Booster Extraction (Triplet)
y = 50 m
g = 8.47
eN_rms = 1.4 mm mrad
sy = 2.7 mm
Bore radius: 20 mm
Quad grad: 40 T/m
Pole tip field: 0.8 T
November 13, 2014

8. Summary Booster to Ion Ring Transfer Line Design (8 GeV )
Horizontal Extraction: Kicker (vert) + Septum
Kicker parameters scaled from AGS extraction
Long Rise/Flat/Fall time (~300 nsec)
5 m rad kick: 1.5 meter kicker at 1 kGauss
Arc - Horizontal Achromat (including reversed septa)
Geometric dispersion suppression at the ends
Good tunability (6 independent quads to match Twiss )
Moderate beam sizes, Magnet Apertures
November 13, 2014