Online Performance Projection for Clusters with Heterogeneous GPUs
LHC Performance Projection
description
Transcript of LHC Performance Projection
The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404.
LHC Performance Projection
1HL-LHC WP2 Task Leader Meeting, 11th June 2013 Oliver Brüning BE-ABP CERN
Thanks to Mike Lamont and Lucio Rossi
The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404.
HL-LHC WP2 Task Leader Meeting, 11th June 2013
Oliver Brüning BE-ABP CERN 3HL-LHC WP2 Task Leader Meeting, 11th June 2013
• 130 days/year in the year following a long shutdown
• 160 days/year in nominal long year
• 0.2 Hubner factor up to LS3
• 25 ns BCMS for run II - 1.4e34 max. in 2015
• 25 ns ultimate intensity for run III
Assumptions:
Oliver Brüning BE-ABP CERN 4HL-LHC WP2 Task Leader Meeting, 11th June 2013
Low emittance Beams from the PS• 50 and 25 ns options (BCMS Batch Compression, Merging and Splitting)• Tested at end of 2012 run (50ns case shown below)• Robustness and operability still to be proven
1.5 micron
2.5 micron
BCMS
Nominal 50 ns
Test 4th December –Emittance from CMS luminosity
Oliver Brüning BE-ABP CERN 5HL-LHC WP2 Task Leader Meeting, 11th June 2013
Beam from injectors LS1 to LS2
Heiko Damerau, Steve Hancock, Alan Findlay
BCMS = Batch Compression, Merging and Splitting
Almost a factor 2 gain in Beam Brightness at the ‘cost’ of 10% less bunches!
Bunch intensity[1011 p/b]
Emittance[mm.mrad]
Exit SPS
Into collisions
25 ns ~nominal 2760 1.15 2.8 3.7525 ns BCMS 2520 1.15 1.4 1.950 ns 1380 1.65 1.7 2.350 ns BCMS 1260 1.6 1.2 1.6
Oliver Brüning BE-ABP CERN 6HL-LHC WP2 Task Leader Meeting, 11th June 2013
Post LS1 – LHC potential performance
• 6.5 TeV• 1.1 ns bunch length• 150 days proton physics, HF = 0.2• 85 mb visible cross-section• * different operational model – caveat - unproven
All numbers approximate
Number of
bunches
Bunch intensity
LHC [1e11]
b*X/b*sep/Xangle
EmitLHC
[mm]Peak Lumi[cm-2s-1] ~Pile-up
Int. Lumi per year
[fb-1]
25 ns 2760 1.15 55/43/189 3.75 0.93 x 1034 25 ~24
25 nslow emit 2520 1.15 45/43/149 1.9 1.7 x 1034 52 ~45
50 ns 1380 1.6 42/43/136 2.51.6 x 1034
level to0.8 x 1034
87 level to
44 ~40*
50 nslow emit 1260 1.6 38/43/115 1.6
2.3 x 1034
level to0.8 x 1034
138 level to
44~40*
Oliver Brüning BE-ABP CERN 7HL-LHC WP2 Task Leader Meeting, 11th June 2013
Performance from injectors 2012
Bunch spacing
[ns]Protons per bunch
[ppb]
Norm. emittance H&V
[microns]Exit SPS
50 1.7 x 1011 1.825 1.2 x 1011 2.7
N.B. the importance of 50 ns in the performance so far.This at the expense of high pile-up.
(And they are in the process of re-inventing themselves again)
Oliver Brüning BE-ABP CERN 8HL-LHC WP2 Task Leader Meeting, 11th June 2013
LHC performance: summary 2012Number of bunches 1380 • Given by 50 ns
Bunch spacing 50 ns • Exploiting important advantage that high bunch intensities bring (luminosity proportional to Ib
2)• No electron cloud effect
Bunch intensity 1.7e11 ppb
• 150% of nominal• NB can collide these intensities without
problems!!! (but with less long range BB)Total intensity 2.2e14 • 70% of nominal – some issues observed
Normalized emittance 2.5 microns
• 67% of nominal – again injector performance and ability to conserve PSB-PS-SPS(-LHC)
Beta* 60 cm • Aggressive, exploiting:• Available aperture and machine quality• Tight collimator settings• Stability
Oliver Brüning BE-ABP CERN 9HL-LHC WP2 Task Leader Meeting, 11th June 2013 9
Availiability
Alick Macpherson
Oliver Brüning BE-ABP CERN 10HL-LHC WP2 Task Leader Meeting, 11th June 2013
RLIUP : Review of the LHC and Injector Upgrade Performance
• Review the expected performance evolution based on the Run-I experience
• Compare different upgrade implementations
• Update the shut down planning for the LHC, it’s injector complex and the experiments in view of the above and create ONE coherent plan (LINAC4, LIU activities, experiments, LHC etc)
Oliver Brüning BE-ABP CERN 11HL-LHC WP2 Task Leader Meeting, 11th June 2013
RLIUP : Review of the LHC and Injector Upgrade Performance
• Operation of LHC as it is, with normal consolidation
• Upgrade:• Addition of PIC : Performance Improving
Consolidation ( 1000-1200 fb-1)• Addition of Upgrade Scenario 1 ( 2000 fb-1)• Addition of Upgrade Scenario 2 ( 3000 fb-1)
The same scheme applies for LIU
Oliver Brüning BE-ABP CERN 12HL-LHC WP2 Task Leader Meeting, 11th June 2013
Review Program:• Session 1: Experiments experience and expectations
Mike Lamont and Austin Ball
• Session 2: Performance after LS1 and once Linac4 is connected to the PSB
Gianluigi Arduini and Stephen Hancock
• Session 3: PICs and Upgrade scenario 1
Malika Meddahi and Lucio Rossi
• Session 4: Upgrade scenario 2
Brennan Goddard and Roland Garoby
• Session 5: Ion related upgrade plans
Massimiliano Ferro-Luzzi and Oliver Brüning
• Session 6: Summary and Conclusions
Oliver Brüning BE-ABP CERN 13HL-LHC WP2 Task Leader Meeting, 11th June 2013
2015Any time after 2016 in // with
ions
Dates & duration tbd by
Eqt Groups2021 or later 2021 or later
Post-LS1Linac4-PSB connection
PICsUpgrade
scenario 1Upgrade
scenario 2
Ions specific
upgradesComments
MACHINE Actions 2 GeV 2 GeVPSB Magnets % %
LL RF % HL RF pure consolidation
Power converters L4 injection Power converters ring, extraction & TL % partly cons, partly for 2 GeV
Beam instrumentation % % % Beam intercepting devices Linac4 injection 2 GeV extraction and transfer Vacuum % % Electrical Systems Cooling and Ventilation % % Installation, Transport and Handling Civil Engineering Interlock Systems Control
PS Beam Instrumentation % Magnets % Transverse damper Longitudinal damper Radiation shielding Power converters % Beam dumps 2 GeV injection RF % % %
SPS Machine interlocks 800 MHz upgrade Improved vacuum sectorisation LSS1 Scraper Beam Instrumentation Transverse damper Improved vacuum sectorisation arcs New TIDVG core Kicker impedance reduction SPS and TI2/TI8 protection devices Depending on beam brightness/I
200 MHz upgrade ??? Needed if above ~1.5e11 at 25 ns
Wide band transverse damper External high energy beam dump New collimation system ??? Probably not needed for LIU beams
New MKE extraction ??? Review pending
aC coating of vacuum chambers ??? To be decided in 2014/15
Upgrade injection damper for ions 50 (100 ?) ns rise time kickers (ions) Shutdown after LS2
Linac3 & LEIR 10 Hz cycling rate LINAC3 multiple charge acceleration LS2
LEIR e-cooler upgrade (?) LS2
LEIR beam dump LS2
LHC
30 fb-1 300 <300-400 fb-1 <300-400 fb-1
>2000 fb-1 3000 fb-1
Starting date
SAM
E A
S sc
enar
io 1
SAM
E A
S sc
enar
io 1
Upgrade matrix (for discussion)
Oliver Brüning BE-ABP CERN 14HL-LHC WP2 Task Leader Meeting, 11th June 2013
2015 2021 or later 2021 or later
Comments
MACHINEPSB Magnets % %
LL RF % HL RFPower converters L4 injection Power converters ring, extraction & TL % partly cons, partly for 2 GeV
Beam instrumentation % % % Beam intercepting devices Linac4 injection 2 GeV extraction and transfer Vacuum % % Electrical Systems Cooling and Ventilation % % Installation, Transport and Handling Civil Engineering Interlock Systems Control
PS Beam Instrumentation % Magnets % Transverse damper Longitudinal damper Radiation shielding Power converters % Beam dumps 2 GeV injection RF % % %
SPS Machine interlocks 800 MHz upgrade Improved vacuum sectorisation LSS1 Scraper Beam Instrumentation Transverse damper Improved vacuum sectorisation arcs New TIDVG core Kicker impedance reduction SPS and TI2/TI8 protection devices Depending on beam brightness/I
200 MHz upgrade ??? Needed if above ~1.5e11 at 25 ns
Wide band transverse damper External high energy beam dump New collimation system ??? Probably not needed for LIU beams
New MKE extraction ??? Review pending
aC coating of vacuum chambers ??? To be decided in 2014/15
Upgrade injection damper for ions 50 (100 ?) ns rise time kickers (ions) Shutdown after LS2
Linac3 & LEIR 10 Hz cycling rate LINAC3 multiple charge acceleration LS2
LEIR e-cooler upgrade (?) LS2
LEIR beam dump LS2
LHC Higher harmonic RF ??? Collim. In dispersion suppressors. ??? Crab cavities Matching section remodelling New triplets & D1 Exp area Collimators upgrade Cryolink Cryo upgrade kicker, TDI, TCDI… ??? Interlocks & QPS ??? Beam Diagnostics e-lens BBLR ??? ??? Stochastic cooling ???
30 fb-1 300 <300-400 fb-1 <300-400 fb-1300-600
(reliability!)1000 - 1200 fb-1 >2000 fb-1 3000 fb-1Integrated Luminosity in 2035 (goals)
CostSA
ME
AS
scen
ario
1
Integ. Lumi. at starting date