Working Group Meetings List

List of future and previous working group meetings with link to the presentations and minutes. An action list is also maintained here.

Tentative List for Future Topics

Electron cooling

• Follow up on AD Cooler Consolidation
  • Influence of AD optics on cooler performance (D.Gamba, G.Tranquille)
  • Comparison between present and future AD cooler: gains in cycle and beam performance (D.Gamba, A.Latina, L.Ponce)
    • Reasons for the present degraded cooling/cycle time
    • Emittance evolution during last 20 years
• ELENA Machine Status (C. Carli, D. Gamba, L.Ponce)
  • Electron cooling with H- in ELENA
• Simulation of e-cooling (A. Borucka, D.Gamba, A. Latina, N. Biancacci, N. Madysa, V. Kain)
  • Follow up on trying using reinforcement learning to ease e-cooler setup
  • Use RF-Track+BetaCool to simulate/predict expected performance of various coolers
• Follow up on HW intervention on e-coolers (G. Tranquille, A. Frassier)
  • Schottky, BPM, AD collectors, ...
• E-cooling physics (BE-ABP + SY-BI + BE-OP)
  • Review theoretical aspects

Electron lenses

• Status of HEL design
  • Optimization of HEL Collector (A.Rossi, D.Nikiforov)
    • Dump efficiency
  • Simulation of e- beam from gun to collector
    • Injected/extracted e- beam: e- orbit "bump" issue solved?
  • Instrumentation "review": do we have enough instrumentation?
    • Backscattered electron Monitor (No people currently working on this)
    • Modulation of e- current to measure e- orbit
  • HEL specifications verification:
    • total residual kick to circulating beam < 1 nrad: how to define tolerances on electron beam?
• HEL Test Stand Results (A.Rossi, S. Sadovich)
  • Results from test with BGC
  • Performance of on the new old gun
  • Simulation of time evolution of electron beam when on/off (medium term)
    • Can this be used to monitor DC part of the beam?

Other topics

• CERN E-Cooler Test Stands
  • Characteristics and parameters, results and future plans (G.Tranquille, J.Cenede)

Previous Meetings

• 20/06/2022: E-Beam - #15 Working Group Meeting - indico -minutes

  • Electron Beam Tests Stand: experimental results and e-beam simulations (Sameed Muhammed)

• 24/11/2021: E-Beam - #14 Remote Working Group Meeting - indico -minutes

  • New AD e-cooler particle tracking in Opera (Luke Von Freeden)

• 13/10/2021: E-Beam - #13 Remote Working Group Meeting - indico -minutes

  • Status of the HEL optics for the e-beam (Adriana Rossi)
  • Injection of the e-beam injection around the LHC beam: issues and possible solutions (Danila Nikiforov)

• 07/09/2021: E-Beam - #12 Remote Working Group Meeting - indico -minutes

  • Status of e-cooling simulations with Betacool and RF-Track (Agnieszka Elzbieta Borucka)

• 12/05/2021: E-Beam - #11 Remote Working Group Meeting - indico - minutes

  • New AD e-cooler project status (Gerard Alain Tranquille)
  • On possible AD optics improvements (Davide Gamba)

• 21/04/2021: E-Beam - #10 Remote Working Group Meeting - indico - minutes

  • Bunch compression studies for inner target collisions within ELENA ring (Volodymyr Rodin)

• 26/03/2021: ColUSM #139 - indico

  • Tolerances on pulse-to-pulse noise of the electron beam (D. Mirarchi)
  • Update on specification for the HEL (S. Redaelli)
  • Update on specification for the HEL modulator (A. Rossi)

• 09/02/2021: Special Joint LIU-ions meeting - indico

  • Cooling force comparison among different models in RF-Track, Betacool and JSPEC (Agnieszka Borucka)

• 15/09/2020: Special Joint WP2/WP5 meeting - indico

  • Halo removal and effects on beam core of electron lens in HL-LHC (Daniele Mirarchi)

• 09/09/2020: E-Beam - #7 Remote Working Group Meeting - indico - minutes

  • Status of Reinforcement Learning Studies for E-Cooler Operation (Nico Madysa)

• 08/07/2020: E-Beam - #6 Remote Working Group Meeting - indico - minutes

  • Warp Simulation of Electron Transport in HEL (Ondrej Sedlacek)
  • CST PARTICLE STUDIO Mesh variation and impact on magnetic field and beam trajectory simulations (Ana Miarnau Marin)
  • A.O.B. Debye Length in a Magnetised Non-Neutral Plasma

• 20/05/2020: E-Beam - #5 Remote Working Group Meeting - indico - minutes

  • Status on e-cooling simulations with BETACOOL and RF-Track (B. Veglia)

• 29/04/2020: E-Beam - #4 Remote Working Group Meeting - indico - minutes

  • Simulation of electron transport within Hollow Electron Lens using Warp – Status report (O. Sedlacek)

• 08/04/2020: E-Beam - #3 Remote Working Group Meeting - indico - minutes

  • e- beam orbit optimisation in ELENA B. Galante
  • ELENA e-cooler electrostatic and magnetostatic settings G.A. Tranquille

• 01/04/2020: E-Beam - #2 Remote Working Group Meeting - indico - minutes

  • Status of SixTrack implementation for Hollow Electron Lens A. Mereghetti

• 25/03/2020: E-Beam - #1 Remote Working Group Meeting - indico - minutes

  • CST simulations of the inlet arm of the Hollow Electron Lens A. Rossi

• 15/01/2020: E-Beam - #8 Working Group Meeting - indico - minutes

  • Diagnostics of BNL e-lenses A. Pikin
  • Beam-Gas Curtain (BGC) monitor for the Hollow e-lens R. Veness
  • Status of e- beam orbit measurement in ELENA e-cooler D. Gamba
  • BPMs for e-coolers and e-lenses L. Soby
  • Betacool for UNIX D. Gamba

• 06/11/2019: E-Beam - #7 Working Group Meeting - indico - minutes

  • Simulation of e- beam with WARP O. Sedlacek
  • E-Lens test stand S. Sadovich

• 18/09/2019: E-Beam - #6 Working Group Meeting - indico - minutes

  • AD/ELENA e-cooler requirements, and past and present performances, D. Gamba
  • Status and plans for hardware interventions on AD/ELENA e-cooler during LS2, G. A. Tranquille

• 10/07/2019: E-Beam - #5 Working Group Meeting - indico - minutes

  • LEIR e-cooler operational experience and needs, A. Saa Hernandez, N. Biancacci
  • Status and plans for hardware interventions on LEIR e-cooler, G. A. Tranquille
  • AoB: LEIR BI Schottky System Status, O. Marqversen
  • AoB: Future Topics, A. Rossi

• 29/05/2019: E-Beam - #4 Working Group Meeting - indico

  • E-beam simulation with latest geometry of HEL, D. Nikiforov

• 10/05/2019: ColUSM#116 - E-BEAM joint meeting - indico - minutes

  • Powering scheme for HEL, D. Mirarchi
  • Design of HEL collector, G. Gobbi
  • Update on IR7 layout for a collimation system with 8 crystals, M. D'Andrea

• 13/03/2019: E-Beam - #2 Working Group Meeting - indico - minutes

  • E-Beam: mandate and organisational matters, A. Rossi
  • E-cooling measurements at LEIR, Angela Saa Hernandez
  • Simulation and code development plans for LS2, .A. Latina

• 10/01/2019: E-coolers and e-lenses simulations - joint BE-ABP / BE-BI meeting - indico

  • Past and present of electron cooling at CERN (AD, LEIR, ELENA …), G.A. Tranquille
  • Simulations of e-gun for AD e-cooler, A. Pikin
  • Simulations of e-cooling effect at LEIR/ELENA, A. Latina
  • Operational aspects and diagnostics of AD and ELENA e-coolers, L.V. Joergensen
  • Experience with e-cooler at ELENA and requirements for optimisation of future applications, C. Carli, D. Gamba
  • Summary of e-beam studies for the HL-LHC Hollow Electron Lens, A. Rossi
  • Simulations for e-lens test stand guns and beams, S. Sadovich
  • Effect of e-lens on circulating beams, D. Mirarchi
  • What next?, A. Rossi