Acknowledgments: LIU-PT members and deputies, H. Bartosik

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Presentation transcript:

Acknowledgments: LIU-PT members and deputies, H. Bartosik Introductory remarks: LIU baseline and beam parameters through the chain M. Meddahi and G. Rumolo Acknowledgments: LIU-PT members and deputies, H. Bartosik Outline: LIU baseline Proton beam parameters Pb ion beam parameters

LIU baseline as of 1/1/16 (Compact  details in the talks during LIU session) PSB  Talk by K. Hanke New H- charge exchange injection at 160 MeV from Linac4 to double brightness Acceleration to 2 GeV with replacement of C02-C04-C16 RF systems by Finemet cavity based RF system, and new main power supply Linac3 + LEIR  Talk by R. Scrivens 100 ms injection rate into LEIR to allow larger accumulated ion current PS  Talk by K. Hanke New injection at 2 GeV for protons to mitigate space charge Newly installed and upgraded longitudinal feedbacks (impedance reduction and against CBI) SPS  Talk by B. Goddard Power upgrade of the main 200 MHz RF system, double available 800 MHz voltage, new LL RF system including slip stacking capability Electron cloud mitigation through beam induced scrubbing + a-C coating of QFs and one arc – keep option of full a-C coating staged to LS3, if proved necessary by Run 3 operation New beam dump system in LSS5 and new design of protection devices to comply with the target HL- LHC beam parameter values Longitudinal impedance reduction through QF-type flange shielding and improvement of HOM damping in 200 MHz cavities General  RF talk by H. Damerau  Transverse feedback talk by W. Höfle

LIU baseline as of 1/1/16 (Compact  details in the talks during LIU session) PSB  Talk by K. Hanke New H- charge exchange injection at 160 MeV from Linac4 to double brightness Acceleration to 2 GeV with replacement of C02-C04-C16 RF systems by Finemet cavity based RF system, and new main power supply Linac3 + LEIR  Talk by R. Scrivens 100 ms injection rate into LEIR to allow larger accumulated ion current PS  Talk by K. Hanke New injection at 2 GeV for protons to mitigate space charge Newly installed and upgraded longitudinal feedbacks (impedance reduction and against CBI) SPS  Talk by B. Goddard Power upgrade of the main 200 MHz RF system, double available 800 MHz voltage, new LL RF system including slip stacking capability Electron cloud mitigation through beam induced scrubbing + a-C coating of QFs and one arc – keep option of full a-C coating staged to LS3, if proved necessary by Run 3 operation New beam dump system in LSS5 and new design of protection devices to comply with the target HL- LHC beam parameter values Longitudinal impedance reduction through QF-type flange shielding and improvement of HOM damping in 200 MHz cavities General  RF talk by H. Damerau  Transverse feedback talk by W. Höfle

Timelines of LIU Run 3 Run 3 Run 2 Run 2 LS 2 LS 2 Run 4 Run 3 LS 3 Activities until LS2 Beam and simulation studies (e.g. space charge, electron cloud, impedance) to validate beam performance Design, procurement and test of equipment (e.g. protection devices) Installation/cabling work during (E)YETS’s when possible Civil engineering work on surface (e.g. new MPS building for PSB) Main LIU installations and hardware work during LS2 Beam commissioning of LIU beams after LS2 Ion beams to be ready by end 2021 Proton beams during Run 3 to be ready for LHC physics after LS3 Run 3 Run 3 Run 2 Run 2 LS 2 LS 2 PHASE 1 with LIU studies, equipment design&test, installation +      Run 4 Run 3 LS 3 Run 4 beam commissioning     HL-LHC installation PHASE 2 LS 4 LS 5

LIU performance reach for protons (25 ns) LIU baseline before SPS impedance reduction against CBI N (x 1011 p/b) e (mm) LIU Baseline 2.0 1.9 LIU BCMS 1.4 HL-LHC 2.3 2.1 HL-LHC request

LIU performance reach for protons (25 ns) SPS impedance reduction Baseline as of 1/1/2016 Linac4 2GeV PS injection energy 200 MHz SPS RF upgrade SPS impedance reduction (LS2) Partial SPS aC coating (LS2) + further scrubbing (Run3) +/- Deploy remaining aC coating (LS3) if scrubbing not sufficient to reach target parameters Potential performance with new baseline HL-LHC request Higher intensity reach possible if no other limitations appear. Need to (re-)check: PS intensity reach Compatibility with all dumps, protection devices, scraper in SPS and transfer lines Heating of SPS sensitive elements (e.g. kickers) However, during Run 3 intensity reach could be limited by beam losses in SPS, which are expected to be reduced with scrubbing

LIU performance reach for Pb ions (50 ns) Intensive study program at the end of 2015 to push injector performance and systematically identify bottlenecks and loss/emittance growth distribution N (x 108 ions/b) e (mm) # of bunches Achieved 2.2 1.45 518 HL-LHC 2.1 1.3 1248

LIU performance reach for Pb ions (50 ns) Intensive study program at the end of 2015 to push injector performance and systematically identify bottlenecks and loss/emittance growth distribution LIU achievable table obtained by combining Extrapolation from information collected in 2015 (transmission, emittance growth) Baseline upgrades, i.e. increase of accumulated intensity in LEIR and slip stacking in SPS N (x 108 ions/b) e (mm) # of bunches Achieved 2.2 1.45 518 LIU 1.7 1.3 1152 HL-LHC 2.1 1248 Bunch splitting in PS

LIU performance reach for Pb ions (50 ns) Intensive study program at the end of 2015 to push injector performance and systematically identify bottlenecks and loss/emittance growth distribution LIU achievable table obtained by combining Extrapolation from information collected in 2015 Baseline upgrades, i.e. increase of accumulated intensity in LEIR and slip stacking in SPS 2016 machine studies with Pb ion beams are crucial to validate predictions, understand losses (in rings and transfers) and explore scenarios Full functionality of the systems and availability of resources expected Options under consideration/study to push Pb ion beam performance. E.g. Push the present LHC injection and extraction (MKI/MKD) kicker gaps to (realistic) limits Consider different filling schemes in PS (e.g. with 50 ns spacing resulting in 25 ns in LHC) 100 ns upgrade of the SPS injection kicker system Reduce LEIR cycling rate More in the next LIU talks