Author: Padrazo Jr, D.
Paper Title Page
TUP1WD01
 Comparative Study of RF BPM Performance via Beam Measurements at NSLS-II  
 
  • D. Padrazo Jr, T.V. Shaftan
    BNL, Upton, Long Island, New York, USA
  
  NSLS-II de­vel­oped and built RF BPM re­ceivers that have been used in the past three years dur­ing com­mis­sion­ing of 200 MeV linac, 3 GeV booster and stor­age ring and now are in rou­tine op­er­a­tions. Re­cently we com­pleted an up­grade of BPM DFE Dig­i­tal Front End gain­ing ben­e­fits of a Xil­inx Zynq FPGA. This FPGA in­cludes a hard dual-core ARM A9 proces­sor which will per­mit more ad­vanced sig­nal pro­cess­ing rou­tines, faster eth­er­net com­mu­ni­ca­tion, as well as re­sources to im­ple­ment a pilot tone based ac­tive cal­i­bra­tion, elim­i­nat­ing the need of ther­mal con­trolled racks. In the past year we pro­cured a Lib­era Bril­liance Plus BPM elec­tron­ics unit to bench­mark the out­come of our up­grade with re­spect to one of the best com­mer­cially avail­able so­lu­tions. This pre­sen­ta­tion is fo­cused on com­par­i­son of per­for­mance be­tween NSLS-II RF BRM ver­sion 2 with the Lib­era unit fo­cus­ing on the fol­low­ing per­for­mance pa­ra­me­ters: Long term sta­bil­ity for 10Hz, as well as char­ac­ter­i­za­tion of FA, TBT and ADC Raw data set. We con­clude our pre­sen­ta­tion by out­lin­ing fu­ture di­rec­tions in up­grad­ing NSLS-II RF BPM AFE, DFE and high-level con­trols to en­able break­through in the area of di­ag­nos­tics of charged par­ti­cle beams.  
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