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Loda, G.L.

Paper Title Page
WEPD023 Development of Ultra-High Quality Surface Finish Undulator Vacuum Chambers for the FERMI@Elettra Project 3138
 
  • G. Lanfranco, P. Craievich, D. La Civita, G.L. Loda, A.A. Lutman, F. Pradal, G. Sostero, M. Stefanutti
    ELETTRA, Basovizza
  • M. Canetti, F. Gangini
    RIAL VACUUM S.p.A, Parma
  
 

The FERMI@​Elettra pro­ject at the ELET­TRA Lab­o­ra­to­ry of Sin­crotrone Tri­este (ST), cur­rent­ly under con­struc­tion, will be com­prised of a lin­ear ac­cel­er­a­tor and two Free-Elec­tron-Laser beam­lines (FEL1, FEL2). In order to de­liv­er high-in­ten­si­ty VUV and soft X-ray puls­es, per­ma­nent mag­net un­du­la­tors with 9 mm min­i­mum vari­able gap will be used. The adopt­ed vac­u­um cham­bers will have a 7 by 25 mm2 el­lip­ti­cal in­ter­nal cross-sec­tion. While man­u­fac­tur­ing the vac­u­um cham­ber in alu­minum helps re­duc­ing the re­sis­tive wall wake­field ef­fects, the cham­ber inner wall sur­face qual­i­ty is strong­ly cor­re­lat­ed to the sur­face rough­ness wake­field com­po­nent. We re­port on the re­sults of the study to im­prove the wall sur­face fin­ish and lower the rough­ness pe­ri­od­ic­i­ty. The cham­ber man­u­fac­tur­ing sta­tus and its align­ment mech­a­nism is also pre­sent­ed.