Booster to Ion Ring Transfer Line

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Presentation transcript:

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

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: 900 + ½ 750 = 127.50 November 13, 2014

Booster (8 GeV, gt = 10) Ekin = 285 MeV – 8 GeV Ring circumference: 234 m Crossing angle: 75 deg. 233.528 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

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 127.50 Arc septum kicker 5.5 2 -2 Coordinates X&Y[cm] X Y Kicker: L[cm] B[kG] Def. Ang [mrad] 150 1 5 Rise time [ns] Flat Top [ns] Fall time [ns] 300 300 300 November 13, 2014

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 127.50 Arc septum kicker Arc Dipoles: Lb = 222 cm B = 2.945 Tesla bend ang. = 14.134 deg. Arc Quadrupoles: Lq = 40 cm GF = 31.4 Tesla/m GD = -31.4 Tesla/m November 13, 2014

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

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

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 127.50 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