CLIC Power Consumption Analysis at High Energy Levels
Discover a detailed analysis of power consumption at various energy levels for the Compact Linear Collider (CLIC), focusing on different systems such as RF, magnets, injectors, and more. The evaluation includes power distribution, efficiency, and optimization efforts for improved performance.
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CLIC power consumption J. B. Jeanneret, CERN BE/ABP LCWS11, GRANADA , September 2011 Clic Power Consumption, BJ, LCWS11 1
CLIC Schematic for 3 TeV 500 GeV : 1 Linac & 1 FM DB Linac DB Linac : RF backbone FM FM Transport Transport DECELERATOR DECELERATOR EXP MAIN LINAC MAIN LINAC BDS BDS Booster Linac Transport Transport DR DR aaaa e+ Prod. e- Prod. Clic Power Consumption, BJ, LCWS11 2
E_CM [TeV] MB injectors magnets MB injectors RF MB PDR+DR magnets MB PDR+DR RF MB Transport MB Long Transport Line DB injectors Sol+Mag DB injectors RF DB FM DB transport to tunnel DB transport in tunnel DB Long Delay Line TBM MB TBM DB Post Decel BDS Interaction area Dump Line Experiment Instrum. Main tunnel Instrum. other Control Main tunnel Control other Cooling & Ventilation Network Losses 0.5 1.5 3 1 Detailed power map all data in MW 1 1 24.3 5.1 17.6 16.5 0.1 3.4 66.8 9.3 0.1 8.1 2.0 1.0 2.8 2.2 0.9 16.3 1.1 15.0 2.1 3.0 0.4 0.8 58.0 13.0 16.5 5.1 17.2 16.5 0.3 3.4 127.6 9.3 0.1 19.6 2.3 2.5 6.7 5.3 1.2 16.3 1.7 15.0 5.0 3.0 1.0 0.8 67.0 17.0 16.5 5.1 17.2 16.5 0.5 6.8 255.2 18.5 3.0 39.1 0.0 4.9 13.3 10.6 1.6 16.3 3.3 15.0 10.0 4.0 2.0 1.0 93.0 28.0 Detailed and precise evaluation made for most systems RF DB Linac, E. Jensen, R. Wegner, G. McMonagle,D. Nisbet, S.Pittet RF Main Linac, A. Grudiev, G. Riddone, I. Syratchev Magnet & rectifiers, M. Modena, A. Vorozhtsov, D. Siemaszko, S.Pittet Cooling and ventilation, M. Nonis Many others on less power-demanding systems TOTAL 271 361 582 Clic Power Consumption, BJ, LCWS11 3
RF : from Drive Beam Linac to Main Beam 3TeV Auxiliaries not included here (in part CV) Modulator yield : = 0.89 : quite challenging (see talk S. Pittet) Klystron yield : = 0.70 a bit beyond today s standards PETS : nearly perfect transformer ( = 0.98) , but 17% of drive beam power goes to dump Main Linac structure yield : compromize with total linac length and low-emittance preservation Clic Power Consumption, BJ, LCWS11 4
Overall power efficiency map 3 TeV 6 % MB production + BDS + Exp The goal is luminosity, not RF production. Need in addition FM 1GHz 12 GHz + transport MB production, BDS & Experiment Auxiliaries are not marginal, see below Overall power efficiency is 5%, but has relative value Luminosity/power is better estimator Clic Power Consumption, BJ, LCWS11 5
Power by system at 3 CM-energies 0.5 TeV , 271 MW 1.5 TeV , 361 MW 3 TeV , 582 MW CLIC is efficient at high CM energy (RF dominated : RF+ML 64% @ 3 TeV, 53% @ 1.5 TeV) Optimization effort was put on DB Linac up to now 500 GeV : requires further optimization on all other systems (mostly MB production and BDS+Exp) Clic Power Consumption, BJ, LCWS11 6
Power by components 0.5 TeV , 271 MW 1.5 TeV , 361 MW 3 TeV , 582 MW Large contribution of cooling and ventilation at 500 GeV Mostly related to the large size of the surface beam complex (20 km of tunnels vs 10km for the 2 Main Linacs) Clic Power Consumption, BJ, LCWS11 7
Total power consumption = f(ECM) E CM [TeV] Luminosity 1% [cm-2s-1] PMB/PTOT 1.40 1034 0.5 3.6% 1.45 1034 1.5 3.9% 2.0 1034 3.0 4.8% If physics favours ECM>1.5 TeV need to determine the threshold 1 2 DB linac Maybe, rework a specific optimized case in the 1.5 TeV range Clic Power Consumption, BJ, LCWS11 8
Mitigation of power budget - I RF already optimized/optimistic/challenging (DB modulators and klystrons, Main Linac) Magnets : may consider Permanent or Super-conducting/super-ferric But not everywhere (SR issues, too large fields, reduced field quality/tunability) Assume 50% power reduction Cooling & ventilation Consider better buildings (air re-circulation, use heated cooling water for heating buildings, etc, ) Expensive but may afford 30% reduction of ventilation power Main beam production ? Detailed studies needed, keep as is. 0.5 Tev 1.5 TeV 3 TeV 0.5 Pmag 0.3 PCV-air P 27 37 62 Cannot be sold as is, P must be balanced with Cost But incentive for further iterations 12 14 18 39 51 80 P- P 232 310 502 P 271 361 582 Clic Power Consumption, BJ, LCWS11 9
Mitigation of power budget - II There is a potential of improvement with power But Performance shall not be degraded (magnets) Cost impact may be important Cannot be integrated to CDR without further detailed work CDR-robust Eco Clic Power Consumption, BJ, LCWS11 10
Energy consumption at 3 TeV Total energy spent /year in operation : E = Pnom T Total energy spent /year during stops : E = Pstop T With 90 days of winter shut-down 2 days of short technical stop every 2 weeks 7 days of short technical stop every 2 months T = 195 days and T = 170 days Pnom= 582 MW and Pstop= 60 MW (ventilation cooling/heating, control) Nominal peak power 582 MW Operation time / year 195 days Energy spent /year 2.95 TWh Effective average power 340 MW Going further : estimate unwanted down-time Can we consider to stop everything until restart i.e. : what is the misalignment time of critical elements (ML, FF) ? Shall we do the exercise for the CDR ? Clic Power Consumption, BJ, LCWS11 11
