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CLIC cost & power consumption issues. Philippe Lebrun on behalf of the C&S WG CLIC Meeting 11 December 2009. CLIC 3 TeV cost estimate 2007 (H. Braun & G. Riddone). Indirect impact. Direct. Main linacs are the cost drivers. The main linacs account for a large fraction of CLIC cost, - PowerPoint PPT Presentation
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CLIC cost & power consumption issuesCLIC cost & power consumption issues
Philippe Lebrunon behalf of the C&S WG
CLIC Meeting11 December 2009
Ph. Lebrun – CLIC meeting 091211 2
Main linacs are Main linacs are thethe cost drivers cost drivers7%
16%
36%5%
36%
Main beam productionDrive beam productionTwo-beam acceleratorsInteraction regionInfrastructure and services
Direct
Indirect impact
CLIC 3 TeV cost estimate 2007 (H. Braun & G.
Riddone)
CLIC 3 TeV (per linac)Modules: 10462
Accelerating str.: 71406 PETS: 35703MB quadrupoles: 1996 DB quadrupoles: 20924
CLIC 3 TeV (per linac)Modules: 10462
Accelerating str.: 71406 PETS: 35703MB quadrupoles: 1996 DB quadrupoles: 20924
CLIC 500 GeV (per linac)Modules: 2124
Accelerating str.: 13156 PETS: 6578MB quadrupoles: 929 DB quadrupoles: 4248
CLIC 500 GeV (per linac)Modules: 2124
Accelerating str.: 13156 PETS: 6578MB quadrupoles: 929 DB quadrupoles: 4248
• The main linacs– account for a large fraction of CLIC cost,– impact strongly on other capital (tunnel, infrastructure, services) and operation
(electricity, cooling, maintenance) costs
• Very high, unprecedented number of components– constitute a major cost (and to some extent, feasibility) issue– will require novel solutions for manufacturing, installation, maintenance, reliability
Ph. Lebrun – CLIC meeting 091211 3
CLIC vs LHC series componentsCLIC vs LHC series componentsNumbers, variants & production techniquesNumbers, variants & production techniques
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
1.E+07
1 10 100 1000
Number of variants
Max
imum
num
ber
of u
nits
per
var
iant Superconductors
Magnet components
Magnets
Power converters
Cryolines
Vacuum
Flexible cells, manual work
Flexible workshops
Automatic chains
CLIC QuadsCLIC TBM
CLIC ASCLIC PETS
AS quadrants
AS discs
Ph. Lebrun – CLIC meeting 091211 4
Cost drivers & potential saving Cost drivers & potential saving optionsoptions Main and drive beam Main and drive beam
productionproduction
Cost driver Cost saving impact
Cost mitigation option Alternative Risk/benefit of alternative
Specific actions
Damping ring wigglers: superconducting
L Normal conducting
Drive beam RF power generation
M 10 MW (peak power) klystrons
More units: reliability vs industrial availability
Drive beam phase and amplitude control
L Alternative scheme under study
Main beam bunch compressor BC2 deep underground
L to M Use DB+PETS instead of klystrons
BC2 close to ground level, before dogleg and turnaround
Increase bending radius of turnaround to reduce CSR?
Beam physics study, then CES comparison
Turnaround magnets L Permanent magnets Power consumption,
Cost impact
L Order of 10 MCHF M Order of 100 MCHF H Order of 1 BCHF
C&S WG review not completed!
Ph. Lebrun – CLIC meeting 091211 5
Cost drivers & potential saving Cost drivers & potential saving optionsoptions
Two-beam modules [1/2]Two-beam modules [1/2]Cost driver Cost
saving impact
Cost mitigation option Alternative Risk/benefit of alternative
Specific actions
Accelerating structure stacked disc construction
H Quadrant construction Technical validation pending
Industrial cost studies, prototyping
Accelerating structure vacuum tank
M Sealed construction Leakage Prototyping
Production yield of accelerating structures
M to H Production control and testing
Industrial prototyping & preseries production
Replacement of 80 MV/m accelerating structures
M Reinstall and reuse 80 MV/m structures
Maximum energy
PETS on-off mechanism M Develop and industrialize
Drive beam quadrupoles: unprecedented number
M Automated manufacturing
Customization to position in decelerator
Allows series powering
To be developed
Specification from beam physics, industrial study
Powering of drive beam quadrupoles
M Novel powering scheme ("intelligent bus")
Series powering (plus trim windings?)
Reduce cabling, limit power consumption
Specification from beam physics
Reliability of power converters
M Hot spares Improved availability of CLIC
Specification from beam physics
Cost impact
L Order of 10 MCHF M Order of 100 MCHF H Order of 1 BCHF
Ph. Lebrun – CLIC meeting 091211 6
Cost drivers & potential saving Cost drivers & potential saving optionsoptions
Two-beam modules [2/2]Two-beam modules [2/2]
Cost driver Cost saving impact
Cost mitigation option Alternative Risk/benefit of alternative
Specific actions
Corrector dipoles M Use radial displacement of quadrupoles
Assess technical feasibility
Active alignment system H Develop low-cost sensors and movers
Reduce number of independant loops
Assess technical feasibility
Stabilization system M Develop low-cost sensors and movers
Review need for hexapod vs tetrapod support of quadrupole
Assess technical feasibility
Support girders M Develop and industrialize non-metallic material construction
Design common girder for main and drive beam
Assess technical feasibility, favorable impact on cost of alignment and stabilization systems
Industrial cost study
Wake-field monitors M Develop low-cost electronics
Review need for WFM in each structure
Beam emittance control
Beam loss monitor dynamic range
M Duplicate BLMs? Machine protection issue
Beam instrumentation M Standardize electronics and develop innovative cabling solutions
Review number of instruments
Beam emittance control
Cost impact
L Order of 10 MCHF M Order of 100 MCHF H Order of 1 BCHF
Ph. Lebrun – CLIC meeting 091211 7
Cost drivers & potential saving Cost drivers & potential saving optionsoptions Interaction regions Interaction regions
Cost impact
L Order of 10 MCHF M Order of 100 MCHF H Order of 1 BCHF
C&S WG review not completed!
Cost driver Cost saving impact
Cost mitigation option Alternative Risk/benefit of alternative
Specific actions
Final BDS for 500 GeV M Reduced-length BDS would not fit in same tunnel
Under study
Ph. Lebrun – CLIC meeting 091211 8
Cost drivers & potential saving Cost drivers & potential saving optionsoptions Infrastructure and services Infrastructure and services
Cost driver Cost saving impact
Cost mitigation option Alternative Risk/benefit of alternative
Specific actions
Location of injector complex w r to main linacs
L Optimize location for 135 m travel difference between e+ and e-
Under study
Tunnel cross-section increase
M Mainly imposed by transverse ventilation
Transverse space, access to equipement
Installed power and power consumption
M Power distribution scheme
Revised assessment of installed power and power consumption
Tunnel ventilation M Limit power dissipation in air, reduce length of ventilation sector
Cost impact
L Order of 10 MCHF M Order of 100 MCHF H Order of 1 BCHF
C&S WG review not completed!
Ph. Lebrun – CLIC meeting 091211 9
Power consumption @ 3 TeVPower consumption @ 3 TeVTotal 415 MWTotal 415 MW (H. Braun, 2008)(H. Braun, 2008)
67%
17%
12%4%
Accelerator RF
Accelerator magnets
Accelerator general services
Detector
6%
73%
5%
5%
11%
MB productionDB productionTB acceleratorsInteraction regionInfrastructure & services
By load type By PBS domain
Ph. Lebrun – CLIC meeting 091211 10
Power consumption @ 3 TeVPower consumption @ 3 TeVNew iteration New iteration (K. Schirm, Nov 2009)(K. Schirm, Nov 2009)
[1/2][1/2]
• AC power distribution & conversion on site– Apply = 0.9 throughout
• RF power flow– First iteration (C&S WG of 091126) shows substantial increase– Identified: increased pulse length in DB linacs, lower modulator efficiency ⇒ Check efficiency values applied throughout RF chain, grid-to-beam
• Magnets– Large increase in power of many magnet systems due to increase in
• Aperture (MB quads, DB turnarounds, DB quads)• Field strength (DB quads)• Current density (MB quads, DB quads)
⇒ Track « hidden » safety factors in beam physics requirements⇒ Impose power limit/low current density to magnet designers (with
additional benefit of indirect water cooling of coils)⇒ Review DB quad powering scheme
Ph. Lebrun – CLIC meeting 091211 11
Power consumption @ 3 TeVPower consumption @ 3 TeVNew iteration New iteration (K. Schirm, Nov 2009)(K. Schirm, Nov 2009)
[2/2][2/2]
• Instrumentation– Large increase in power: number of channels– Particularly damaging as power is dissipated in HVAC system⇒ Innovative solutions for readout electronics, data transmission, cabling
• Infrastructure & services– Not yet reviewed– Previous values taken as percentage of installed capacity (H.B.)
• Experimental area– Previous value taken from CMS (H.B.)⇒ Input needed from physics & detector WG
⇒ Work in progress, to be followed early 2010 ⇒ Different estimates required for different purposes
– Overall efficiency comparison with ILC (@ 500 GeV)– Sizing of AC power distribution– Sizing of water cooling & HVAC systems– Operational cost
Ph. Lebrun – CLIC meeting 091211 12
SummarySummary
• Cost consciousness well established in CLIC technical working groups• Cost drivers and cost reduction areas identified - as well as their
interplay - analysis not yet exhaustive• Analytical costing exercise under way by domain coordinators with
input from technical system experts, in domains where technical baseline exists
• Cost studies by industrial companies, in particular for large-series components, useful for substantiating cost estimate
• New iteration of power consumption estimate started• Feedback on cost and power provided to technical system design• Cost and power consumption can only be finalized after freeze of
configuration for CDR
Ph. Lebrun – CLIC meeting 091211 13
CLIC @ 3 TeVCLIC @ 3 TeV
Ph. Lebrun – CLIC meeting 091211 14
CLIC @ 500 GeVCLIC @ 500 GeV
28 MW
Main beam injection, magnets, services, infrastructure
and detector
Dumps
Mainlinac
PETS
Drive beamacceleration
252.6 MW
148.0 MW 1 GHz RF power
137.4 MW Drive Beam Power
107.4 MW
13.7 MW plug/RF = 38.8 %
M = .90
A = .977
TRS = .98
T = .96
F = .97 .96D = .84
Drive beampower extr.
Power suppliesklystrons
RF/main = 27.7 %
tot = 6.8 %
S = .95
RF = .277
101.1 MW 12 GHz RF power (2 x 101 kJ x 50 Hz)
Main beam
Wall Plug
K = .70
415 MWModulator auxiliaries
260.4 MW AC power
REL = .93 aux = 0.97
154.6 MW
Power flow @ 3 TeV
9.75 MW
Main beam injection, magnets, services, infrastructure
and detector
Dumps
Mainlinac
PETS
Drive beamacceleration
61.5 MW
1 GHz RF power: 36.1 MW
Drive Beam power: 33.5 MW
26.2 MW
13.7 MW plug/RF = 38.8 %
M = .90
A = .977
TRS = .98
T = .96
F = .97 .96D = .84
Drive beampower extr.
Power suppliesklystrons
RF/main = 39.6 %
tot = 7.5 %
S = .95
RF = .396
12 GHz RF power: 24.6 MW(2 x 25 kJ x 50 Hz)
Main beam
Wall Plug
K = .70
129.4 MWModulator auxiliaries
63.4 MW
REL = .93
66 MW
Power flow @ 500 GeV
aux = 0.97