Status of the EP Simulations and Facilities for the SPL

CERN is as­sem­bling a new ver­ti­cal elec­tropol­ish­ing fa­cil­i­ty in order to pro­cess sev­er­al nio­bi­um cav­i­ties of beta 1 and beta 0.65 in the con­text of the HP-SPL R&D pro­gramme. Elec­tro­chem­i­cal sim­u­la­tions are being used in order to de­fine the op­ti­mal cath­ode ge­om­e­try to pro­cess the cav­i­ties in a ver­ti­cal po­si­tion. Macro­scop­ic prop­er­ties of fluid dy­nam­ics like the Reynolds num­ber and ther­mo­dy­nam­ics linked to the power dis­si­pat­ed in the pro­cess are taken into ac­count to di­men­sion the main sys­tem com­po­nents. All the ma­te­ri­als from the dif­fer­ent equip­ments must be com­pat­i­ble with all chem­i­cals with­in the re­quired work­ing tem­per­a­ture and pres­sure. To pro­vide safe op­er­at­ing con­di­tions when han­dling chem­i­cals or pro­cess­ing cav­i­ties, spe­cif­ic safe­ty and pro­tec­tion equip­ment is also fore­seen.