Author: Toral, F.
Paper Title Page
MOPC042 RF and Accelerating Structure of 12 MeV UPC Race-track Microtron 169
 
  • Yu.A. Kubyshin, X. Gonzalez Arriola
    UPC, Barcelona, Spain
  • D. Carrillo, L. García-Tabarés, F. Toral
    CIEMAT, Madrid, Spain
  • S.J. Mathot
    CERN, Geneva, Switzerland
  • G. Montoro
    EPSC, Castelldefels, Spain
  • V.I. Shvedunov
    MSU, Moscow, Russia
  
  We de­scribe the de­sign and tech­ni­cal char­ac­ter­is­tics of a C-band SW ac­cel­er­at­ing struc­ture of a 12 MeV race-track mi­crotron, which is under con­struc­tion at the Tech­ni­cal Uni­ver­si­ty of Cat­alo­nia, and its RF sys­tem with a 5712 MHz mag­netron as a source. Re­sults of cold tests of the ac­cel­er­at­ing struc­ture, be­fore and after the braz­ing, and of high-pow­er tests of the RF sys­tem at a spe­cial stand are re­port­ed. The main fea­tures of the mag­netron fre­quen­cy sta­bi­liza­tion sub­sys­tem are also out­lined.  
 
MOPC047 RF Design of the Re-buncher Cavities for the LIPAC Deuteron Accelerator 184
 
  • A. Lara, I. Podadera, F. Toral
    CIEMAT, Madrid, Spain
  
  Funding: Work partially supported by Spanish Ministry of Science and Innovation under project ENE2009-11230.
Re-bunch­er cav­i­ties are an es­sen­tial com­po­nent of LIPAC (Lin­ear IFMIF Pro­to­type Ac­cel­er­a­tor), present­ly being built at Rokkasho (Japan). The deuteron beam ex­it­ing from the RFQ (Radio Fre­quen­cy Quadrupole) struc­ture has to be prop­er­ly adapt­ed to the su­per­con­duct­ing RF (SRF) linac. Re-bunch­ers are placed in the Medi­um En­er­gy Beam Trans­port (MEBT) line and their ob­jec­tive is to lon­gi­tu­di­nal­ly focus the deuteron beam. IFMIF re-bunch­ers must pro­vide a 350 kV E0LT at 175 MHz con­tin­u­ous wave (CW). The avail­able length for the re-bunch­er is lim­it­ed by the gen­er­al lay­out of the MEBT. The high power dis­si­pa­tion de­rived from the high ef­fec­tive volt­age and the short avail­able length is an im­por­tant de­sign chal­lenge. Four dif­fer­ent nor­mal con­duct­ing cav­i­ty de­signs were in­ves­ti­gat­ed: the pill­box type, dou­ble gap coax­i­al res­onators, and mul­ti-gap quar­ter wave and H res­onators. The per­for­mance of these cav­i­ties was stud­ied with the nu­mer­i­cal codes HFSS and ANSYS. The fun­da­men­tal fre­quen­cy and field pat­tern of each re-bunch­er was in­ves­ti­gat­ed in HFSS. This work pre­sents the re­sults of such anal­y­ses. 		 
 
MOPO026 Design, Manufacturing and Tests of Closed-loop Quadrupole Mover Prototypes for European XFEL 535
 
  • J. Munilla, J. Calero, J.M. Cela-Ruiz, L. García-Tabarés, A. Guirao, J.L. Gutiérrez, T. Martínez de Alvaro, E. Molina Marinas, S. Sanz, F. Toral, C. Vazquez
    CIEMAT, Madrid, Spain
  
  Funding: Work partially supported by Spanish Ministry of Science and Innovation under SEI Resolution on 17-September-2009
In this re­port the de­vel­op­ment of a quadrupole mover with sub­mi­cron re­peata­bil­i­ty is re­port­ed, which will be used in the in­ter­sec­tions of the Un­du­la­tor Sys­tems of the Eu­ro­pean XFEL (EXFEL). It is part of the Span­ish in-kind con­tri­bu­tion to this fa­cil­i­ty. The main spec­i­fi­ca­tions in­clude sub­mi­cron re­peata­bil­i­ty for a 70 kg quadrupole mag­net with­in com­pact di­men­sions and a ±1.5 mm stroke in the ver­ti­cal and hor­i­zon­tal di­rec­tion. Com­pact lin­ear ac­tu­a­tors based on 5-phase step­ping mo­tors have been cho­sen. Ver­ti­cal ac­tu­a­tor works in a wedge con­fig­u­ra­tion to take me­chan­i­cal ad­van­tage. A closed-loop con­trol sys­tem has been de­vel­oped to achieve this re­peata­bil­i­ty. For the feed­back, one LVDT sen­sor for each axis was used. Me­chan­i­cal switch­es are used to limit move­ment. In ad­di­tion, hard-stops are in­clud­ed for emer­gen­cy. Pro­to­typ­ing stage is done and a se­ri­al pro­duc­tion of more than 90 de­vices is ex­pect­ed, so in­tense work has been done to achieve a re­li­able in­dus­tri­al pro­duc­tion and val­i­da­tion. In this re­port, re­sults of me­chan­i­cal mea­sure­ments in­clud­ing re­pro­ducibil­i­ty, tests of dif­fer­ent op­er­a­tion strate­gies and crit­i­cal sit­u­a­tions will be re­port­ed. 		 
 
TUPC011 Striplines for CLIC Pre-Damping and Damping Rings* 1012
 
  • C. Belver-Aguilar, A. Faus-Golfe
    IFIC, Valencia, Spain
  • M.J. Barnes, G. Rumolo
    CERN, Geneva, Switzerland
  • F. Toral
    CIEMAT, Madrid, Spain
  • C. Zannini
    EPFL, Lausanne, Switzerland
  
  The Com­pact Lin­ear Col­lid­er (CLIC) study ex­plores the scheme for an elec­tron-positron col­lid­er with high lu­mi­nos­i­ty and a nom­i­nal cen­ter-of-mass en­er­gy of 3 TeV: CLIC would com­ple­ment LHC physics in the mul­ti-TeV range. The CLIC de­sign re­lies on the pres­ence of Pre-Damp­ing Rings (PDR) and Damp­ing Rings (DR) to achieve, through syn­chrotron ra­di­a­tion, the very low emit­tance need­ed to ful­fil the lu­mi­nos­i­ty re­quire­ments. The spec­i­fi­ca­tions for the kick­er sys­tems are very chal­leng­ing and in­clude very low beam cou­pling impedance and ex­cel­lent field ho­mo­gene­ity: striplines have been cho­sen for the kick­er el­e­ments. An­a­lyt­i­cal cal­cu­la­tions have been car­ried out to de­ter­mine the ef­fect of ta­per­ing upon the high fre­quen­cy beam cou­pling impedance. In ad­di­tion de­tailed nu­mer­i­cal mod­el­ing of the field ho­mo­gene­ity has been per­formed and the sen­si­tiv­i­ty of the ho­mo­gene­ity to var­i­ous pa­ram­e­ters, in­clud­ing stripline cross-sec­tion, has been stud­ied. This paper pre­sents the main con­clu­sions of the beam impedance cal­cu­la­tions and field ho­mo­gene­ity pre­dic­tions.  
 
WEPO014 Magnetic Design of Quadrupoles for the Medium and High Energy Beam Transport line of the LIPAC Accelerator 2424
 
  • C. Oliver, B. Brañas, A. Ibarra, I. Podadera, F. Toral
    CIEMAT, Madrid, Spain
  
  Funding: Work partially supported by Spanish Ministry of Science and Innovation under project AIC10-A-000441 and ENE2009-11230.
The LIPAC ac­cel­er­a­tor will be a 9 MeV, 125 mA cw deuteron ac­cel­er­a­tor which will ver­i­fy the va­lid­i­ty of the de­sign of the fu­ture IFMIF ac­cel­er­a­tor. A Medi­um En­er­gy Beam Trans­port line (MEBT) is nec­es­sary to han­dle the high cur­rent beam from the RFQ to the Su­per­con­duct­ing RF ac­cel­er­at­ing cav­i­ties (SRF) where­as a High En­er­gy Beam Trans­port line (HEBT) is used to match the beam from the SRF to the beam dump. The high space charge and beam power de­ter­mine the beam dy­nam­ics in both trans­port lines. As a con­se­quence, mag­nets with strong fields in a re­duced space are re­quired. Along the trans­port beam­lines, there are dif­fer­ent types of quadrupoles with steer­ers and a dipole. Spe­cial care is de­vot­ed to max­i­mize the in­te­grat­ed fields in the avail­able space. Both 2-D and 3-D mag­net­ic cal­cu­la­tions are used to op­ti­mize coil con­fig­u­ra­tions. Mag­net­ic per­for­mance and cost, both of mag­net and power sup­ply, have been taken into ac­count for final choice. In this paper, the de­sign of the re­sis­tive quadrupoles of the MEBT and HEBT of the LIPAC ac­cel­er­a­tor is pre­sent­ed. 		 
 
WEPS058 The Medium Energy Beam Transport Line (MEBT) of IFMIF/EVEDA LIPAc 2628
 
  • I. Podadera, J.C. Calvo, J.M. Carmona, A. Ibarra, D. Iglesias, A. Lara, C. Oliver, F. Toral
    CIEMAT, Madrid, Spain
  
  Funding: Work partially supported by Spanish Ministry of Science and Innovation under project AIC10-A-000441 and ENE2009-11230.
The IFMIF-EVE­DA Lin­ear IFMIF Pro­to­type Ac­cel­er­a­tor (LIPAc)will be a 9 MeV, 125 mA CW deuteron ac­cel­er­a­tor which aims to val­i­date the tech­nol­o­gy that will be used in the fu­ture IFMIF ac­cel­er­a­tor. The ac­cel­er­a­tion of the beam will be car­ried out in two stages. An RFQ will in­crease the en­er­gy up to 5 MeV be­fore a Su­per­con­duct­ing RF (SRF) linac made of a chain of eight Half Wave Res­onators bring the par­ti­cles to the final en­er­gy. Be­tween both stages, a Medi­um En­er­gy Beam Trans­port line (MEBT) is in charge of trans­port­ing and match­ing the beam be­tween the RFQ and the SRF. The trans­verse fo­cus­ing of the beam is con­trolled by five quadrupole mag­nets with in­te­grat­ed steer­ers, grouped in one triplet and one dou­blet. Two bunch­er cav­i­ties sur­round­ing the dou­blet han­dle the lon­gi­tu­di­nal dy­nam­ics. Two mov­able col­li­ma­tors are also in­clud­ed to pu­ri­fy the beam op­tics com­ing out the RFQ and avoid loss­es in the SRF. From the in­puts of the beam dy­nam­ics group, CIEMAT is in charge of de­sign­ing, man­u­fac­tur­ing and in­te­grat­ing all the com­po­nents of the beam­line. In this con­tri­bu­tion, the MEBT sub­sys­tem will be de­scribed and the main ob­jec­tives and is­sues for each com­po­nent will be dis­cussed. 		 
 
WEPO030 Fabrication and Testing of the First Magnet Package Prototype for the SRF Linac of LIPAc 2463
 
  • S. Sanz, J. Calero, F.M. De Aragon, J.L. Gutiérrez, I. Moya, I. Podadera, F. Toral, J.G.S. de la Gama
    CIEMAT, Madrid, Spain
  • N. Bazin, P. Bosland, P. Bredy, N. Grouas, P. Hardy, V.M. Hennion, J. Migne, F. Orsini, B. Renard
    CEA/DSM/IRFU, France
  • G. Disset, J. Relland
    CEA, Gif-sur-Yvette, France
  • H. Jenhani
    CEA/IRFU, Gif-sur-Yvette, France
  • E.N. Zaplatin
    FZJ, Jülich, Germany
  
  Funding: Work partially supported by Spanish Ministry of Science and Innovation under project AIC10-A-000441 and ENE2009-11230.
The IFMIF-EVE­DA ac­cel­er­a­tor will be a 9 MeV, 125 mA CW deuteron ac­cel­er­a­tor which aims to val­i­date the tech­nol­o­gy that will be used in the fu­ture IFMIF ac­cel­er­a­tor. The SRF Linac de­sign is based on su­per­con­duct­ing Half Wave Res­onators (HWR) cav­i­ties op­er­at­ing at 4.4 K. Due to space charge as­so­ci­at­ed to the high in­ten­si­ty beam, a short, but strong, su­per­con­duct­ing fo­cus­ing mag­net pack­age is nec­es­sary be­tween cav­i­ties. The se­lect­ed con­fig­u­ra­tion has been a su­per­con­duct­ing NbTi solenoid act­ing as a mag­net­ic lens and a con­cen­tric outer solenoid in an­tipar­al­lel con­fig­u­ra­tion to re­duce the dan­ger­ous stray field on the cav­i­ties. The se­lect­ed ar­range­ment for the steer­ers is a pair of par­al­lel race­track coils for each ver­ti­cal and hor­i­zon­tal axis. This paper de­scribes the man­u­fac­tur­ing tech­niques of the dif­fer­ent coils, and the test re­al­ized in warm and cold con­di­tions, with spe­cial at­ten­tion to the train­ing test of the main solenoid, as the nom­i­nal work­ing point in the load line is very high (86.2%). 		 
 
THPC174 Manufacturing and Testing of the First Phase Shifter Prototypes Built by CIEMAT for the European-XFEL 3308
 
  • I. Moya, J. Calero, J.M. Cela-Ruiz, L. García-Tabarés, A. Guirao, J.L. Gutiérrez, L.M. Martinez Fresno, T. Martínez de Alvaro, E. Molina Marinas, A.L. Pardillo, L. Sanchez, S. Sanz, F. Toral, C. Vazquez, J.G.S. de la Gama
    CIEMAT, Madrid, Spain
  
  Funding: Work partially supported by the Spanish Ministry of Science and Innovation under SEI Resolution on 17-September-2009.
The Eu­ro­pean X-ray Free Elec­tron Laser (EXFEL) will be based on a 10 to 17.5 GeV elec­tron linac. Its beam will be used in three un­du­la­tor sys­tems to ob­tain ul­tra-bril­liant X-ray flash­es from 0.1 to 6 nanome­tres for ex­per­i­men­ta­tion. The un­du­la­tor sys­tems are formed by 5m long un­du­la­tor seg­ments and 1.1m long in­ter­sec­tions in be­tween. They ac­com­mo­date a quadrupole on top of a pre­ci­sion mover, a beam po­si­tion mon­i­tor, two air coil cor­rec­tors and a phase shifter. The func­tion of the phase shifter is to ad­just the phase of the elec­tron beam with re­spect to that of the ra­di­a­tion field when the wave­length is changed by tun­ing the gap. In this con­text, CIEMAT will de­liv­er 92 phase shifters, as part of the Span­ish in-kind con­tri­bu­tion to the EXFEL pro­ject. This paper de­scribes the en­gi­neer­ing de­sign, the man­u­fac­tur­ing tech­niques and the me­chan­i­cal and mag­net­ic tests re­al­ized on the first pro­to­types.