• F. Toral, P. Abramian, J. Calero, D. Carrillo, F.M. De Aragon, L. García-Tabarés, J.L. Gutiérrez, A. Lara, E. Rodríguez García, L. Sanchez
  CIEMAT, Madrid
• S. Döbert, I. Syratchev
  CERN, Geneva

The goal of the pre­sent CLIC test fa­cil­i­ty (CTF3) is to demon­strate the tech­ni­cal fea­si­bil­i­ty of the CLIC scheme. The Test Beam Line (TBL) is used to study a CLIC de­cel­er­a­tor fo­cus­ing on 12 GHz power pro­duc­tion and the sta­bil­i­ty of the de­cel­er­at­ed beam. The ex­tract­ed CTF3 drive beam from the com­bin­er ring (CR) fea­tures a max­i­mum in­ten­si­ty of 28 A and 140 ns pulse du­ra­tion, where the Test Beam Line con­sists of 16 cells, each one in­clud­ing a BPM, a quadrupole on top of a mi­crom­e­ter-ac­cu­ra­cy mover and a RF power ex­trac­tor so-called PETS (Power Ex­trac­tion and Trans­fer Struc­ture). This paper de­scribes the first pro­to­type fab­ri­ca­tion tech­niques, with par­tic­u­lar at­ten­tion to the pro­duc­tion of the long cop­per rods which in­duce the RF gen­er­a­tion. A spe­cial test bench for the char­ac­ter­i­za­tion of the de­vice with low RF power mea­sure­ments has been de­vel­oped. Per­formed mesure­ments of the scat­ter­ing pa­ram­e­ters and the elec­tric field pro­file along the struc­ture are care­ful­ly de­scribed. Fi­nal­ly, the pro­to­type has been in­stalled at CLEX, and first mea­sure­ments with beam are also re­port­ed.