1 / 5

LIU-IONS topics and aims for Linac3 General plans and milestones D.Manglunki

LIU-IONS topics and aims for Linac3 General plans and milestones D.Manglunki. New Pb-Pb baseline. For the record (you probably can’t read this…). Linac 3 Increased intensity, towards nominal performance as in design report: 50e  A of Pb54+ for 200  s

janina
Download Presentation

LIU-IONS topics and aims for Linac3 General plans and milestones D.Manglunki

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LIU-IONS topics and aims for Linac3 General plans and milestonesD.Manglunki

  2. New Pb-Pb baseline

  3. For the record (you probably can’t read this…) • Linac 3 • Increased intensity, towards nominal performance as in design report: 50eA of Pb54+ for 200 s • Pulsing at 10 Hz (currently 5Hz). • Possibly lengthen the pulse to 230s • LEIR • Up to 12 injections from Linac 3 (10Hz), 3.6 s cycle, extraction of 2 bunches at 72MeV/u towards PS • Increase of performance needed compared to 2013 p-Pb run: same emittances but intensity at least 40% higher (8.6E10 charges in 2 bunches, or 7.8E8 Pb 54+ ions/bunch) • PS • same RF gymnastics as what was “nominal” in design report: • batch expansion (h = 16 -> 14 -> 12) • splitting to 4 bunches (h = 12 -> 24) • batch expansion (h = 24 -> 21) • acceleration to 26GeV/c/charge on h=21 • at high energy, rebucketing at h = 169 • SPS • On flat bottom: accumulation of 2x6 PS batches using Q20 optics • Improvements on RF noise (fixed harmonic system on flat bottom) • Switch to fixed frequency for acceleration of 48 bunches • Momentum Slip stacking at intermediate energy, away from transition, to merge the two trains into one, with 50 ns bunch spacing. • Repeat ~52 (26x2) times for filling each LHC ring with up to 1248 bunches

  4. Projected beam parameters (1) stripper stages between Linac3 & LEIR, then between PS & SPS; parameters before/after stripping(2) corresponding to the maximum bunch intensity(3) average intensity taking into account the distribution of bunch intensities along the train(4) For LEIR: at end of flat bottom, just before acceleration.(5) Assuming 7.5MV RF voltage.

  5. In Linac3 • Pulsing at 10Hz • To be tested before LS2 (i.e. last Pb run in 2018), needs installing at Xmas 2017 • In baseline; cost partly covered by consolidation • New LBS line • Part of “nice to have” but approved in baseline for 1MCHF. If more expensive, needs to come from consolidation. • Needed after LS2 once L4 connected to PSB • New/improved optics for LEBT • Included in baseline • ASAP for studies in LEIR with increased Pb current • Oven Test Stand • Already started (?) • In baseline • Ion Source Test Stand • No budget as of today (is there manpower?)

More Related