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

Summary PERLE@Orsay '10+2 pages summary’ 1. Introduction - Max Klein- Liverpool Univ (0.5p) 2. Lattice and Optics - Alex Bogacz- JLAB (2p) 3. Infrastructure at Orsay, including remarks on beam extraction/experiments – Walid Kaabi- LAL (1p) 4. Gun and Injector – Boris Militsyn /Deepa Kalinin- STFC(1p) 5. Cavity – Bob Rimmer- JLAB (1p) 6. Cryomodule – Sébastien Bousson- IPNo (1p) 7. Magnets – Attilio Milanesi/Pierre-Alexandre Thonet- CERN (1p) 8. Dump - Oliver Bruning-CERN (from CDR) (0.5p) 9. Power equipment - Erk Jensen –CERN (1p) 10. Monitoring equipment - Walid Kaabi (1p) 11. Cryogenic equipment (IPNO?) Alex Bogacz PERLE Mtg, May 26, 2017

Summary Appendix (2p) Configuration and Cost – Achille Stocchi Table of Components with Basic parameters, numbers, cost and delivery status (input for that comes from the individual contributions, we shall know the nominal cost and the real cost, which is smaller due to in kind contributions) Alex Bogacz PERLE Mtg, May 26, 2017

Summary Steps towards the TDR – Discussion - All Liner lattice optimization Initial magnet specs Momentum acceptance and longitudinal match End-to-End simulation with synchrotron radiation, CSR micro-bunching (ELEGANT?) Correction of nonlinear aberrations (geometric & chromatic) with multipole magnets (sext. octu.?) RF cavity design, HOM content BBU studies (TDBBU?) Injection line/chicane design Space-charge studies at injection Diagnostics & Instrumentation Multi-particle tracking studies of halo formation Final magnet specs Engineering design Alex Bogacz PERLE Mtg, May 26, 2017