Author: Resta-López, J.
Paper Title Page
MOPME068 Feasibility Study of a 2nd Generation Smith-Purcell Radiation Monitor for the ESTB at SLAC 634
 
  • N. Fuster Martinez, A. Faus-Golfe, J. Resta-López
    IFIC, Valencia, Spain
  • H.L. Andrews
    LANL, Los Alamos, New Mexico, USA
  • F. Bakkali Taheri, R. Bartolini, G. Doucas, I.V. Konoplev, C. Perry, A. Reichold, S.R. Stevenson
    JAI, Oxford, United Kingdom
  • J. Barros, N. Delerue, M. Grosjean
    LAL, Orsay, France
  • V. Bharadwaj, C.I. Clarke
    SLAC, Menlo Park, California, USA
  
  The use of a ra­dia­tive process such as the Co­her­ent Smith-Pur­cell Ra­di­a­tion (CSPR) is a very promis­ing non-in­va­sive tech­nique for the re­con­struc­tion of the time pro­file of rel­a­tivis­tic elec­tron bunches. Cur­rently ex­ist­ing CSPR mon­i­tors do not have yet sin­gle-shot ca­pa­bil­ity. Here we study the fea­si­bil­ity of using a CSPR based mon­i­tor for bunch length mea­sure­ment at the End Sta­tion Test Beam (ESTB) at SLAC. The aim is to de­sign a sec­ond-gen­er­a­tion de­vice with sin­gle-shot ca­pa­bil­ity, and use it as a di­ag­nos­tic tool at ESTB. Sim­u­la­tions of the spec­tral CSPR en­ergy dis­tri­b­u­tion and fea­si­bil­ity study have been per­formed for the op­ti­miza­tion of the pa­ra­me­ters and de­sign of such a de­vice.  
 
MOPME069 Multi-OTR System for Linear Colliders 637
 
  • J. Resta-López, A. Faus-Golfe
    IFIC, Valencia, Spain
  • J. Alabau-Gonzalvo, R. Apsimon, A. Latina
    CERN, Geneva, Switzerland
  
  We study the fea­si­bil­ity of using a multi-Op­ti­cal Tran­si­tion Ra­di­a­tion (mOTR) sys­tem for fast trans­verse emit­tance re­con­struc­tion and x-y cou­pling cor­rec­tion in the Ring to Main Linac (RTML) of the fu­ture lin­ear col­lid­ers: ILC and CLIC. OTR mon­i­tors are ma­ture and re­li­able di­ag­nos­tic tools that could be very suit­able for the setup and tun­ing of the ma­chine in sin­gle-bunch mode. Here we study the re­quire­ments for a mOTR sys­tem adapted to the op­ti­cal con­di­tions and beam pa­ra­me­ters of the RTML of both the ILC and CLIC.  
 
MOPWO023 Upgrade and Systematic Measurement Campaign of the ATF2 Multi-OTR System 933
 
  • A. Faus-Golfe, J. Alabau-Gonzalvo, C. Blanch Gutierrez, J. Resta-López
    IFIC, Valencia, Spain
  • J. Cruz, E. Marín, D.J. McCormick, G.R. White, M. Woodley
    SLAC, Menlo Park, California, USA
  
  A multi-Op­ti­cal Tran­si­tion Ra­di­a­tion (mOTR) sys­tem made of four sta­tions is being used rou­tinely since Sep­tem­ber 2011 for trans­verse beam size mea­sure­ment and emit­tance re­con­struc­tion in the ex­trac­tion line of ATF2, pro­vid­ing di­ag­nos­tic sup­port dur­ing the ATF2 tun­ing op­er­a­tion. Fur­ther­more it is also an ex­cel­lent tool for fast trans­verse cou­pling cor­rec­tion. Due to the com­pact­ness of the cur­rent de­sign the sys­tem has an in­flu­ence in the in­crease of the trans­verse emit­tance due to wake­field ef­fects when a si­mul­ta­ne­ous mea­sure­ment is made. To avoid this ef­fect a new tar­get holder and a new op­tics has been de­signed and im­ple­mented. In this paper we de­scribe the pre­sent sta­tus of the ATF2 mOTR sys­tem, show­ing re­cent per­for­mance re­sults, and hard­ware de­sign im­prove­ments.  
 
MOPWO024 Design of the CLIC Pre-Main Linac Collimation System 936
 
  • R. Apsimon, A. Latina, D. Schulte, J.A. Uythoven
    CERN, Geneva, Switzerland
  • J. Resta-López
    IFIC, Valencia, Spain
  
  A main beam col­li­ma­tion sys­tem, up­stream of the main linac, is es­sen­tial to pro­tect the linac from par­ti­cles in the beam halo. The pro­posed sys­tem con­sists of an en­ergy col­li­ma­tion (EC) sys­tem just after the booster linac near the start of the Ring-to-Main Linac (RTML) trans­fer line and an EC and be­ta­tron col­li­ma­tion (BC) sys­tem at the end of the RTML, just be­fore the main linac. The de­sign re­quire­ments are pre­sented and the clean­ing ef­fi­ciency of the pro­posed sys­tems is analysed for dif­fer­ent de­sign choices.  
 
WEPEA047 Dynamic Aperture Performance for Different Collision Optics Scenarios for the LHC Luminosity Upgrade 2609
 
  • M. Giovannozzi, R. De Maria, S.D. Fartoukh
    CERN, Geneva, Switzerland
  • A. Chancé, B. Dalena, J. Payet
    CEA/IRFU, Gif-sur-Yvette, France
  • K.M. Hock, M. Korostelev, A. Wolski
    The University of Liverpool, Liverpool, United Kingdom
  • J. Resta-López
    IFIC, Valencia, Spain
  
  Funding: The HiLumi LHC Design Study is included in the HL-LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404.
The ATS[1] op­tics so­lu­tion for the HL-LHC of­fers the pos­si­bil­ity of dif­fer­ent col­li­sion op­tics, with a β* as small as 10 cm in both trans­verse planes, or with a β* as­pect ratio of up to 4 push­ing β* to even smaller value (5cm) in the par­al­lel sep­a­ra­tion plane while re­lax­ing it (20 cm) in the cross­ing plane. The lat­ter con­fig­u­ra­tion fea­tures two pos­si­ble op­tions for al­ter­nated ori­en­ta­tions of the cross­ing plane in the two high lu­mi­nos­ity in­ser­tions, both con­sid­ered in this study. In this paper we study the im­pact of few se­lected field im­per­fec­tion mod­els of the new mag­nets fore­seen for the up­grade through track­ing sim­u­la­tions and scal­ing laws.
[1] S. Fartoukh, ‘’An Achromatic Telescopic Squeezing (ATS) Scheme for LHC Upgrade’’, in proceedings of IPAC11, p. 2088.