Keyword: hadron
Paper Title Other Keywords Page
MOA3I1 Beam Dynamics Challenges in the Design of the Electron-Ion Collider electron, polarization, proton, emittance 23
 
  • Y. Luo, M. Blaskiewicz, D. Marx, E. Wang, F.J. Willeke
    BNL, Upton, New York, USA
  • A. Blednykh, C. Montag, V. Ptitsyn, V.H. Ranjbar, S. Verdú-Andrés
    Brookhaven National Laboratory (BNL), Electron-Ion Collider, Upton, New York, USA
  • S. Nagaitsev
    JLab, Newport News, Virginia, USA
  
  Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy.
The Elec­tron-Ion Col­lider (EIC), presently under con­struc­tion at Brookhaven Na­tional Lab­o­ra­tory, will col­lide po­lar­ized high-en­ergy elec­tron beams with hadron beams, achiev­ing lu­mi­nosi­ties up to 1 × 1034 cm¿2 s¿1 in the cen­ter-of-mass en­ergy range of 20-140 GeV. To achieve such high lu­mi­nos­ity, we adopt high bunch in­ten­si­ties for both beams, small and flat trans­verse beam sizes at the in­ter­ac­tion point (IP), a large cross­ing angle of 25 mrad, and a novel strong hadron cool­ing in the Hadron Stor­age Ring (HSR) to coun­ter­act in­tra-beam scat­ter­ing (IBS) at the col­li­sion en­ergy. In this talk, we will re­view the beam dy­nam­ics chal­lenges in the de­sign of the EIC, par­tic­u­larly the sin­gle-par­ti­cle dy­namic aper­ture, po­lar­iza­tion main­te­nance, beam-beam in­ter­ac­tion, im­ped­ance bud­get and in­sta­bil­i­ties. We will also briefly men­tion some tech­ni­cal chal­lenges as­so­ci­ated with beam dy­nam­ics, such as strong hadron cool­ing, mul­ti­poles and noises of crab cav­i­ties, power sup­ply cur­rent rip­ples, and the vac­uum up­grade to ex­ist­ing beam pipes of the Hadron Stor­age Ring of the EIC. 		 
slides icon Slides MOA3I1 [3.437 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-HB2023-MOA3I1  
About • Received ※ 02 October 2023 — Revised ※ 06 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 18 October 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THAFP09 Optimizing Beam Dynamics in LHC with Active Deep Learning framework, network, simulation, dynamic-aperture 422
 
  • D. Di Croce, T. Pieloni, M. Seidel
    EPFL, Lausanne, Switzerland
  • M. Giovannozzi, F.F. Van der Veken
    CERN, Meyrin, Switzerland
  • E. Krymova
    SDSC, Lausanne, Switzerland
  • M. Seidel
    PSI, Villigen PSI, Switzerland
  
  The Dy­namic Aper­ture (DA) is an im­por­tant con­cept for the study of non-lin­ear beam dy­nam­ics in a cir­cu­lar ac­cel­er­a­tor. It refers to the re­gion in phase space where a par­ti­cle’s mo­tion re­mains bounded over a given num­ber of turns. Un­der­stand­ing the fea­tures of DA is cru­cial for op­er­at­ing cir­cu­lar ac­cel­er­a­tors as it pro­vides in­sights on non-lin­ear beam dy­nam­ics and the phe­nom­ena af­fect­ing beam life­time. The stan­dard ap­proach to cal­cu­late the DA is com­pu­ta­tion­ally very in­ten­sive. In our study, we aim at de­ter­min­ing an op­ti­mal set of pa­ra­me­ters that af­fect DA, like be­ta­tron tune, chro­matic­ity, and Lan­dau oc­tu­pole strengths, using a Deep Neural Net­work (DNN) model. The DNN model pre­dicts the so-called an­gu­lar DA, based on sim­u­lated LHC data. To en­hance its per­for­mance, we in­te­grated the DNN model into an in­no­v­a­tive Ac­tive Learn­ing (AL) frame­work. This frame­work not only en­ables re­train­ing and up­dat­ing of the model, but also fa­cil­i­tates ef­fi­cient data gen­er­a­tion through smart sam­pling. The re­sults demon­strate that the use of the Ac­tive Learn­ing (AL) frame­work al­lows faster scan­ning of LHC ring con­fig­u­ra­tion pa­ra­me­ters with­out com­pro­mis­ing the ac­cu­racy of the DA cal­cu­la­tions.  
slides icon Slides THAFP09 [1.028 MB]  
poster icon Poster THAFP09 [6.173 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-HB2023-THAFP09  
About • Received ※ 01 October 2023 — Revised ※ 04 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 31 October 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THBP18 Revised Collimation Configuration for the Updated FCC-hh Layout collimation, optics, insertion, collider 495
 
  • A. Abramov, R. Bruce, M. Giovannozzi, G. Pérez Segurana, S. Redaelli, T. Risselada
    CERN, Meyrin, Switzerland
  
  The col­li­ma­tion sys­tem for the hadron Fu­ture Cir­cu­lar Col­lider (FCC-hh) must han­dle pro­ton beams with an un­prece­dented nom­i­nal beam en­ergy and stored beam en­ergy in ex­cess of 8 GJ, and pro­tect the su­per­con­duct­ing mag­nets and other sen­si­tive equip­ment while en­sur­ing a high op­er­a­tional ef­fi­ciency. The re­cent de­vel­op­ment of the 16-di­pole lat­tice base­line for the FCC-hh, and the as­so­ci­ated lay­out changes, has ne­ces­si­tated an adap­ta­tion of the col­li­ma­tion sys­tem. A re­vised con­fig­u­ra­tion of the col­li­ma­tion sys­tem is pre­sented, con­sid­er­ing novel high-beta op­tics in the be­ta­tron col­li­ma­tion in­ser­tion. Per­for­mance is eval­u­ated through loss map stud­ies, with a focus on losses in crit­i­cal areas, in­clud­ing col­li­ma­tion in­ser­tions and ex­per­i­men­tal in­ter­ac­tion re­gions.  
DOI • reference for this paper ※ doi:10.18429/JACoW-HB2023-THBP18  
About • Received ※ 01 October 2023 — Revised ※ 06 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 19 October 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THBP35 Analysis Tools for Numerical Simulations of Dynamic Aperture with Xsuite simulation, collider, dynamic-aperture, framework 551
 
  • T. Pugnat, M. Giovannozzi, F.F. Van der Veken
    CERN, Meyrin, Switzerland
  • D. Di Croce
    EPFL, Lausanne, Switzerland
  
  Re­cently, sev­eral ef­forts have been made at CERN to de­velop a new track­ing tool, Xsuite, which is in­tended to be the suc­ces­sor to Six­Track. In this frame­work, analy­sis tools have also been pre­pared with the goal of pro­vid­ing ad­vanced post-pro­cess­ing tech­niques for the in­ter­pre­ta­tion of dy­namic aper­ture sim­u­la­tions. The pro­posed soft­ware suite, named Xdyna, is meant to be a suc­ces­sor to the ex­ist­ing SixDesk en­vi­ron­ment. It in­cor­po­rates all re­cent ap­proaches de­vel­oped to de­ter­mine the dy­namic aper­ture for a fixed num­ber of turns. It also en­ables study­ing the time evo­lu­tion of the dy­namic aper­ture and the fit­ting of rig­or­ous mod­els based on the sta­bil­ity-time es­ti­mate pro­vided by the Nekhoro­shev the­o­rem. These mod­els make it pos­si­ble to link the dy­namic aper­ture to beam life­time, and thus pro­vide very rel­e­vant in­for­ma­tion for the ac­tual per­for­mance of par­ti­cle col­lid­ers. These tools have been ap­plied to stud­ies re­lated to the lu­mi­nos­ity up­grade of the CERN Large Hadron Col­lider (HL-LHC), the re­sults of which are pre­sented here.  
poster icon Poster THBP35 [0.514 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-HB2023-THBP35  
About • Received ※ 28 September 2023 — Revised ※ 05 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 11 October 2023
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)