PERLE - Current Accelerator Design Alex Bogacz PERLE Mtg, May 26, 2017

Overview PERLE@Orsay (450 MeV) - Layout Compact footprint (24 m × 5.5 m × 0.8 m) Configured with to styles of 1.3 Tesla ‘curved bends’ proposed by Pierre Thonet Multi-pass linac Optics in ER mode Choice of linac Optics: 3-pass ‘up’ + 3-pass ‘down’ Arc Optics Architecture Isochronous Arcs with Flexible Momentum Compaction (FMC) Optics Switchyard Vertical Spreaders/Recombiners with matching sections: Linacs-Arcs ‘First cut’ lattice design for PERLE@Orsay Two Linacs + Six Arcs Magnet inventory (Dipoles and Quads ) Alex Bogacz PERLE Mtg, May 26, 2017

PERLE@Orsay - Layout 450 MeV 1 : 3 : 5 2 : 4 : 6 DE = 75 MeV 5.5 m injector 5 MeV DE = 75 MeV 2 : 4 : 6 5 MeV dump DC = lRF/2 Alex Bogacz PERLE Mtg, May 26, 2017

Three passes ‘up’ + Three passes ‘down’ PERLE@Orsay - Layout 450 MeV 1 : 3 : 5 24 m 0.8 m 5.5 m DE = 75 MeV injector 5 MeV DE = 75 MeV 2 : 4 : 6 5 MeV dump DC = lRF/2 Three passes ‘up’ + Three passes ‘down’ Alex Bogacz PERLE Mtg, May 26, 2017

Alternative Magnet Solution (Cost-effective) Alex Bogacz PERLE Mtg, May 26, 2017

Alex Bogacz PERLE Mtg, May 26, 2017

Alex Bogacz PERLE Mtg, May 26, 2017

PERLE@Orsay - Layout Top view Side view 2 : 4 : 6 1 : 3 : 5 5.5 m 24 m 4 m 10 m 2 : 4 : 6 1 : 3 : 5 Side view 0.4 m + 0.4 m Alex Bogacz PERLE Mtg, May 26, 2017

Cryo-module - Layout and Cavity Specs SNS 805 MHz Cryo-module 8.491 m 801.58 MHz RF, 5-cell cavity: l = 37.40 cm Lc = 5l/2 = 93.50 cm Grad = 20 MeV/m (18.7 MeV per cavity) DE= 74.8 MeV per Cryo-module 93.5 cm Alex Bogacz PERLE Mtg, May 26, 2017

Linac - Layout Linac length: 26 × lRF Re-injection chicane 8.491 m 9.72 10 BETA_X&Y[m] BETA_X BETA_Y Cryo-module (8.491 m) Re-injection chicane Linac length: 26 × lRF Alex Bogacz PERLE Mtg, May 26, 2017

Multi-pass ER Optics Acceleration Deceleration E6 E5 E4 E3 E2 E1 Einj 59.2518 12 BETA_X&Y[m] BETA_X BETA_Y DISP_X DISP_Y E6 E5 E4 E3 E2 E1 Einj Acceleration 59.2518 12 BETA_X&Y[m] BETA_X BETA_Y DISP_X DISP_Y Einj E1 E2 E3 E4 E5 E6 Deceleration Alex Bogacz PERLE Mtg, May 26, 2017

Arc 6 Optics – FMC Lattice 7.70429 10 2 -2 BETA_X&Y[m] DISP_X&Y[m] BETA_X BETA_Y DISP_X DISP_Y 453 MeV 4×450 bends Qx,y = 1.25 triplet: Q1 Q2 Q3 singlet: Q4 triplet: Q3 Q2 Q1 Quadrupoles: Q1 L[cm] =10 G[T/m] = - 23.6 Q2 L[cm] =15 G[T/m] = 28.2 Q3 L[cm] =10 G[T/m] = - 22.4 Q4 L[cm] =10 G[T/m] = 8.6 Dipoles: (91.2 cm long) B = 1.3 Tesla Alex Bogacz PERLE Mtg, May 26, 2017

Arc 3 Optics – FMC Lattice 7.52246 10 2 -2 BETA_X&Y[m] DISP_X&Y[m] BETA_X BETA_Y DISP_X DISP_Y 230 MeV 4×450 bends Qx,y = 1.25 triplet: Q1 Q2 Q3 singlet: Q4 triplet: Q3 Q2 Q1 Quadrupoles: Q1 L[cm] =10 G[T/m] = - 13.2 Q2 L[cm] =15 G[T/m] = 13.1 Q3 L[cm] =10 G[T/m] = - 9.3 Q4 L[cm] =10 G[T/m] = 3.1 Dipoles: (45.6 cm long) B = 1.3 Tesla Alex Bogacz PERLE Mtg, May 26, 2017

Switchyard - Vertical Separation of Arcs (1, 3, 5) 80 MeV 230 MeV 379 MeV 40 cm Energies1 : 3 : 5 35 cm 20 cm Dipoles: (20 and 40 cm long) B = 0.9 Tesla Alex Bogacz PERLE Mtg, May 26, 2017

Switchyard - Vertical Separation of Arcs (2, 4, 6) 40 cm Energies1 : 2 : 3 25 cm 155 MeV 304 MeV 453 MeV Dipoles: (30 cm long) B = 1.3 Tesla Alex Bogacz PERLE Mtg, May 26, 2017

Vertical Spreaders - Optics Spr. 1 (80 MeV) Spr. 5 (379 MeV) 4.27981 20 1 -1 BETA_X&Y[m] DISP_X&Y[m] BETA_X BETA_Y DISP_X DISP_Y 4.023 20 1 -1 BETA_X&Y[m] DISP_X&Y[m] BETA_X BETA_Y DISP_X DISP_Y vertical step I vertical step II vertical chicane Alex Bogacz PERLE Mtg, May 26, 2017

Arc 1 Optics (80 MeV) Isochronous Arc 2-step vert. Recombiner 15.71 20 2 -3 BETA_X&Y[m] DISP_X&Y[m] BETA_X BETA_Y DISP_X DISP_Y Isochronous Arc pathlength: 42 × lRF 2-step vert. Spreader 2-step vert. Recombiner 1800 Arc Spr. dipoles: 4 450 bends L = 20 cm B = 9.5 kGauss Arc dipoles : 4450 bends L = 45.6 cm B = 4.5 kGauss Rec. dipoles: 4 450 bends L = 20 cm B = 9.5 kGauss quads: L = 10 cm G  1 kGauss/cm Alex Bogacz PERLE Mtg, May 26, 2017

Magnet Inventory

Alex Bogacz PERLE Mtg, May 26, 2017

114 100 150 28 Alex Bogacz PERLE Mtg, May 26, 2017

Summary PERLE@Orsay (450 MeV) Multi-pass linac Optics in ER mode ‘lean design’, fewer magnet varieties, 1.3 Tesla curved bends Multi-pass linac Optics in ER mode Linear lattice: 3-pass ‘up’ + 3-pass ‘down’ Arc Optics Choice Flexible Momentum Compaction Optics Complete Arc Architecture Vertical switchyard Matching sections: Linac-Switchyard-Arc ‘First cut’ linear lattice design Two Linacs + Six Arcs Magnet inventory Dipole and Quad design (Pierre Thonet and Cynthia Vallerand) Alex Bogacz PERLE Mtg, May 26, 2017