• J. Alabau-Gonzalvo, C. Blanch Gutierrez, J.V. Civera, A. Faus-Golfe, J.J. García-Garrigós
  IFIC, Valencia
• J. Cruz, D.J. McCormick, G.R. White
  SLAC, Menlo Park, California

In this paper we de­scribe the de­sign, in­stal­la­tion and first cal­i­bra­tion tests of a Multi Op­ti­cal Tran­si­tion Ra­di­a­tion (OTR) mon­i­tor sys­tem in the beam di­ag­nos­tic sec­tion of the Ex­trac­tion (EXT) line of ATF2, close to the multi wire scan­ner sys­tem. This sys­tem will be a valu­able tool for mea­sur­ing beam sizes and emit­tances from the ATF Damp­ing Ring (DR). With an op­ti­cal res­o­lu­tion of about 2 um an orig­i­nal OTR de­sign demon­strat­ed the abil­i­ty to mea­sure a 5.5um beam size in one beam pulse and to take many fast mea­sure­ments. This gives the OTR the abil­i­ty to mea­sure the beam emit­tance with high statis­tics, giv­ing a low error and a good un­der­stand­ing of emit­tance jit­ter. Fur­ther­more the near by wire scan­ners will be a defini­tive test of the OTR as a beam emit­tance di­ag­nos­tic de­vice. The mu­ti-OTR sys­tem de­sign pro­posed here is based on the ex­ist­ing OTR1X, lo­cat­ed after the sep­tums at the en­trance of the EXT line.

• A. Faus-Golfe, C. Blanch Gutierrez, J.V. Civera-Navarrete, J.J. García-Garrigós
  IFIC, Valencia

A set of 16 In­duc­tive Pick-Ups (IPU) for Beam Po­si­tion Mon­i­tor­ing (BPM) with its as­so­ci­at­ed elec­tron­ics were de­signed, con­struct­ed and char­ac­ter­ized at IFIC for the Test Beam Line (TBL) of the 3rd CLIC Test Fa­cil­i­ty (CTF3) at CERN. In Oc­to­ber 2009 the full set of IPUs, (BPS) was suc­cess­ful­ly in­stalled in the TBL line. In this paper, we de­scribe the pro­to­typ­ing and se­ries pro­duc­tion phas­es of the BPSs de­vel­op­ment, fo­cus­ing in the im­ple­men­ta­tion and the re­sults anal­y­sis de­rived from their char­ac­ter­i­za­tion tests. Two spe­cial test bench­es were de­signed and built to per­form the char­ac­ter­i­za­tion tests at low and high fre­quen­cies. The low fre­quen­cy set up based on a wire-method test bench for em­u­lat­ing the beam po­si­tion vari­a­tions helped us to de­ter­mine the BPS per­for­mance pa­ram­e­ters at beam pulse time scale from 100μs/10kHz to 10ns/100MHz. On the other hand, the high fre­quen­cy test setup, based on an adapt­ed coax­i­al trans­mis­sion line, was ded­i­cat­ed to ob­tain the BPS lon­gi­tu­di­nal cou­pling impedance at the beam mi­crobunch­es time scale (83ps/12GHz). Fur­ther­more, we also pre­sent the first beam per­for­mance tests made in the TBL line.