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La Civita, D.

Paper Title Page
MOPD097 FERMI@Elettra Low-Energy RF Deflector FEM Analysis 933
 
  • D. La Civita, P. Craievich, Y.A. Kharoubi, G. Penco
    ELETTRA, Basovizza
  • M. Petronio
    DEEI, Trieste
  
 

FERMI@​Elettra is a soft X-ray fourth gen­er­a­tion light source under con­struc­tion at the ELET­TRA lab­o­ra­to­ry. To char­ac­ter­ize the beam phase space by means of mea­sure­ments of the bunch length and of the trans­verse slice emit­tance two de­flect­ing cav­i­ties will be po­si­tioned at two points in the linac. One will be placed at 250 MeV (low en­er­gy), after the first bunch com­pres­sor (BC1); the sec­ond at 1.2 GeV (high en­er­gy), just be­fore the FEL pro­cess starts. The Low-En­er­gy RF De­flec­tor con­sists in a 5 cells, stand­ing wave, nor­mal con­duct­ing, RF cop­per cav­i­ty. A sin­gle ANSYS model has been de­vel­oped to per­form all of the cal­cu­la­tions in a mul­ti-step pro­cess. In this paper we dis­cuss and re­port on re­sults of elec­tro­mag­net­ic, ther­mal, and struc­tural anal­y­sis.

  
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.