A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z  

Garmendia, N.

Paper Title Page
TUPEA055 Design and Implementation of a Pulsed Digital LLRF System for the RAL Front End Test Stand 1458
 
  • H. Hassanzadegan, N. Garmendia
    ESS Bilbao, Bilbao
  • F.J. Bermejo
    Bilbao, Faculty of Science and Technology, Bilbao
  • M. Eguiraun
    ESS-Bilbao, Zamudio
  • V. Etxebarria
    University of the Basque Country, Faculty of Science and Technology, Bilbao
  • D.J.S. Findlay, A.P. Letchford
    STFC/RAL/ISIS, Chilton, Didcot, Oxon
  
 

De­sign, im­ple­men­ta­tion and some prac­ti­cal re­sults of the pulsed dig­i­tal LLRF sys­tem (am­pli­tude, phase and tun­ing loops) of the RFQ for the ISIS front end test stand are pre­sent­ed. The de­sign is based on a fast ana­log front-end for RF-base­band con­ver­sion and a mod­el-based Vir­tex-4 FPGA unit for sig­nal pro­cess­ing and PI reg­u­la­tion. Com­plex­i­ty of the LLRF tim­ing is sig­nif­i­cant­ly re­duced and the LLRF re­quire­ments are ful­filled by uti­liz­ing the RF-base­band con­ver­sion method com­pared to the con­ven­tion­al RF-IF ap­proach. Va­lid­i­ty of the con­trol loops is en­sured prac­ti­cal­ly by hard­ware-in-the-loop co-sim­u­la­tion of the sys­tem in MAT­LAB-Simulink using an alu­mini­um mock-up cav­i­ty. It was shown through ex­ten­sive tests that the LLRF sys­tem meets all the re­quire­ments in­clud­ing am­pli­tude and phase sta­bil­i­ty, dy­nam­ic range, noise level and ad­di­tion­al­ly pro­vides a full am­pli­tude and phase con­trol range and a phase mar­gin larg­er than 90 de­grees for loop sta­bil­i­ty.

  
MOPEC075 Status of the RAL Front End Test Stand 642
 
  • A.P. Letchford, M.A. Clarke-Gayther, D.C. Faircloth, S.R. Lawrie, M. Perkins, P. Wise
    STFC/RAL/ISIS, Chilton, Didcot, Oxon
  • S.M.H. Alsari, S. Jolly, D.A. Lee, P. Savage
    Imperial College of Science and Technology, Department of Physics, London
  • I. Ariz, R. Enparantza, P. Romano, A. Sedano
    Fundación TEKNIKER, Eibar (Gipuzkoa)
  • J.J. Back
    University of Warwick, Coventry
  • F.J. Bermejo
    Bilbao, Faculty of Science and Technology, Bilbao
  • M. Eguiraun
    ESS-Bilbao, Zamudio
  • V. Etxebarria
    University of the Basque Country, Faculty of Science and Technology, Bilbao
  • C. Gabor, D.C. Plostinar
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon
  • N. Garmendia, H. Hassanzadegan
    ESS Bilbao, Bilbao
  • A. Kurup
    Fermilab, Batavia
  • J.K. Pozimski
    STFC/RAL, Chilton, Didcot, Oxon
  
 

The Front End Test Stand (FETS) under con­struc­tion at the Ruther­ford Ap­ple­ton Lab­o­ra­to­ry is the UK's con­tri­bu­tion to re­search into the next gen­er­a­tion of High Power Pro­ton Ac­cel­er­a­tors (HPPAs). HPPAs are an es­sen­tial part of any fu­ture Spal­la­tion Neu­tron Source, Neu­tri­no Fac­to­ry, Muon Col­lid­er, Ac­cel­er­a­tor Driv­en Sub-crit­i­cal Sys­tem, Waste Trans­muter etc. FETS will demon­strate a high qual­i­ty, high in­ten­si­ty, chopped H-mi­nus beam and is a col­lab­o­ra­tion be­tween RAL, Im­pe­ri­al Col­lege and the Uni­ver­sti­ty of War­wick in the UK and the Uni­ver­si­dad del Pais Vasco in Spain. This paper de­scribes the cur­rent sta­tus and fu­ture plans of FETS.

  
THPEC069 Beam Dynamics Studies on the Radio-Frequency Quadrupole for the Bilbao Accelerator 4214
 
  • I. Bustinduy, N. Garmendia, H. Hassanzadegan, D. de Cos
    ESS Bilbao, Bilbao
  • F.J. Bermejo
    Bilbao, Faculty of Science and Technology, Bilbao
  • V. Etxebarria, J. Portilla
    University of the Basque Country, Faculty of Science and Technology, Bilbao
  • J. Feuchtwanger
    ESS-Bilbao, Zamudio
  • S. Jolly, J.K. Pozimski, P. Savage
    Imperial College of Science and Technology, Department of Physics, London
  • A.P. Letchford
    STFC/RAL/ISIS, Chilton, Didcot, Oxon
  
 

The main ob­jec­tive of the Bil­bao Front End Test Stand (ETOR­FETS) is to set up a fa­cil­i­ty to demon­strate ex­per­i­men­tal­ly the de­sign ideas for the fu­ture ESS LINAC that are being pro­posed in dis­cus­sion fo­rums by the tech­ni­cal sci­en­tif­ic com­mu­ni­ty. ETOR­FETS is fo­cused on the first stage of the lin­ear ac­cel­er­a­tor, name­ly, that of the Ra­dio-Fre­quen­cy Quadrupole (RFQ) and its pre and post beam trans­port sys­tems. The RFQ bunch­es, fo­cus­es trans­verse and lon­gi­tu­di­nal­ly, and ac­cel­er­ates charged par­ti­cles in the low-en­er­gy range (up to ~ 3 MeV), thus be­com­ing one of the main com­po­nents of the ac­cel­er­at­ing struc­ture. The first RFQ sim­u­la­tions, per­formed in Su­per­fish and GPT soft­ware pack­ages, will be pre­sent­ed in this work.