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