This document provides an overview of the status, plans, and outlook for the Compact Linear Collider (CLIC) accelerator project. Key points include:
1) CLIC has made progress optimizing its design for lower initial energies around 380 GeV based on LHC results, with the goal of reducing costs and power requirements for early stages.
2) Recent test facility results like those at CTF3 have demonstrated drive beam generation and two-beam acceleration, advancing critical technologies.
3) The collaboration aims to provide a staged implementation plan up to 3 TeV by 2019 to inform the next European strategy update, accounting for further LHC data and optimizing costs.
4) Advancing X-
Link Adapatation in Mobile Satellite Links: Field Trial Results using SDR and...Anxo Tato Arias
We describe the experiment that was carried out to communicate a Mobile Platform and a Ground Station through a Medium Earth Orbit (MEO) satellite. The physical layer in both ends, based on the specifications of the Satellite Component of the Universal Mobile Telecommunications System (S-UMTS), was implemented using Software Defined Radio (SDR) technology. The Mobile Terminal was boarded in both an unmanned aerial vehicle (UAV) and a car for the field trials. The ultimate goal was to test the practical performance of different physical layer adaptive techniques in the return link, and evaluate the open loop signal to noise ratio (SNR) contribution to the link adaptation algorithms.
BIO-CAP-UK: Air/Oxy Biomass Combustion with CO2 Capture Technology, UK Study - presentation by Karen Finney in the Biomass CCS session at the UKCCSRC Cardiff Biannual Meeting, 10-11 September 2014
Seismic QC & Filtering with GeostatisticsGeovariances
The quality of seismic volumes is critical in building reliable reservoir models. Seismic data are often polluted by acquisition or processing artifacts which may have strong impact on subsequent seismic processing or interpretation. Geostatistics allows filtering efficiently seismic noise and artifacts without modifying the signal.
Geovariances provides solutions from seismic data quality control and filtering to reservoir characterization. This technology is based on geostatistics and all algorithms are available in Isatis, leader in geostatistical software solutions.
The only documentation on the building downwash algorithm in AERMOD, referred to as PRIME, is found in the 2000 A&WMA Journal article by Schulman, Strimaitis and Scire. Recent field and wind tunnel studies have shown that AERMOD overpredicts concentrations by factors of 2 to 8 for certain building configurations. While a wind tunnel equivalent building dimension study (EBD) can be conducted to approximately correct the overprediction bias, past field and wind tunnel studies indicate that there are notable flaws in the PRIME building downwash theory. A detailed review of the theory supported by CFD and wind tunnel simulations of flow over simple rectangular buildings revealed the following serious theoretical flaws: enhanced turbulence in the building wake starting at the wrong longitudinal location; constant enhanced turbulence extending up to the wake height; constant initial enhanced turbulence in the building wake (does not vary with roughness or stability); discontinuities in the streamline calculations; and no method to account for streamlined or porous structures.
This paper documents some of the theoretical flaws that have been found in PRIME and provides supporting CFD and wind tunnel observations that confirm these findings. A suggested path forward to correct these problems is also outlined in accordance to Appendix W’s mandate that a model should be based on sound science and that its components are validated accordingly. In other words, corrections to the downwash theory in the model would ensure that the right answer is obtained for the right reason.
Presentation made by Prof. Adriano Camps (Universitat Politècnica de Catalunya) at ICMARS 2010 (India, 16-December-2010) on the MIRAS instrument aboard ESA's SMOS mission.
A coupled Electromagnetic-Mechanical analysis of next generation Radio Telesc...Altair
This work considers the design of large and complex receivers used in the field of radio astronomy, e.g. for the Square Kilometer Array (SKA) project. The purpose of this work is to consider a coupled simulation where the electromagnetic analysis, performed with the computational electromagnetic software package FEKO, is enhanced by the structural analysis offered by HyperWorks products such as HyperMesh and Optistruct. External influences such as gravity, wind-loading and thermal properties will be taken into account. This will enhance the electromagnetic simulation results, thereby aiding designers to mitigate these environmental effects.
Speakers
Dr. Danie Ludick, Postdoctoral researcher, Stellenbosch University
Evaluation of the Theoretical Problems with Building Downwash Using A New Met...Sergio A. Guerra
While the current EBD method is the best available option to determine correct building dimensions in the model, a different method was suggested by EPA in the 2011 Memo: Model Clearinghouse Review of EBD for AERMOD. Attachment B to the 2011 Memo includes an assessment of the Alcoa Davenport Works EBD Study. In this evaluation EPA compared wind tunnel observations with AERMOD derived concentrations. However, this evaluation has important shortcomings. First, to carry out this comparison between wind tunnel and AERMOD concentrations, it is necessary to collect velocity profiles that include longitudinal and vertical turbulent intensity measurements upwind of the stack. These data were not available for the EPA evaluation of the Alcoa Davenport Works EBD Study. Second, the wind tunnel model operating conditions were converted to full scale conditions by using exact similarity. However, exact similarity is not used to specify model operating conditions since only momentum ratios are matched but not buoyancy ones. Whereas EPA did not provide important details on how this study was performed, this paper outlines how to properly carry out this new method where AERMOD is used to determine equivalent building dimensions. The viability of this new method was also evaluated and discussed.
Link Adapatation in Mobile Satellite Links: Field Trial Results using SDR and...Anxo Tato Arias
We describe the experiment that was carried out to communicate a Mobile Platform and a Ground Station through a Medium Earth Orbit (MEO) satellite. The physical layer in both ends, based on the specifications of the Satellite Component of the Universal Mobile Telecommunications System (S-UMTS), was implemented using Software Defined Radio (SDR) technology. The Mobile Terminal was boarded in both an unmanned aerial vehicle (UAV) and a car for the field trials. The ultimate goal was to test the practical performance of different physical layer adaptive techniques in the return link, and evaluate the open loop signal to noise ratio (SNR) contribution to the link adaptation algorithms.
BIO-CAP-UK: Air/Oxy Biomass Combustion with CO2 Capture Technology, UK Study - presentation by Karen Finney in the Biomass CCS session at the UKCCSRC Cardiff Biannual Meeting, 10-11 September 2014
Seismic QC & Filtering with GeostatisticsGeovariances
The quality of seismic volumes is critical in building reliable reservoir models. Seismic data are often polluted by acquisition or processing artifacts which may have strong impact on subsequent seismic processing or interpretation. Geostatistics allows filtering efficiently seismic noise and artifacts without modifying the signal.
Geovariances provides solutions from seismic data quality control and filtering to reservoir characterization. This technology is based on geostatistics and all algorithms are available in Isatis, leader in geostatistical software solutions.
The only documentation on the building downwash algorithm in AERMOD, referred to as PRIME, is found in the 2000 A&WMA Journal article by Schulman, Strimaitis and Scire. Recent field and wind tunnel studies have shown that AERMOD overpredicts concentrations by factors of 2 to 8 for certain building configurations. While a wind tunnel equivalent building dimension study (EBD) can be conducted to approximately correct the overprediction bias, past field and wind tunnel studies indicate that there are notable flaws in the PRIME building downwash theory. A detailed review of the theory supported by CFD and wind tunnel simulations of flow over simple rectangular buildings revealed the following serious theoretical flaws: enhanced turbulence in the building wake starting at the wrong longitudinal location; constant enhanced turbulence extending up to the wake height; constant initial enhanced turbulence in the building wake (does not vary with roughness or stability); discontinuities in the streamline calculations; and no method to account for streamlined or porous structures.
This paper documents some of the theoretical flaws that have been found in PRIME and provides supporting CFD and wind tunnel observations that confirm these findings. A suggested path forward to correct these problems is also outlined in accordance to Appendix W’s mandate that a model should be based on sound science and that its components are validated accordingly. In other words, corrections to the downwash theory in the model would ensure that the right answer is obtained for the right reason.
Presentation made by Prof. Adriano Camps (Universitat Politècnica de Catalunya) at ICMARS 2010 (India, 16-December-2010) on the MIRAS instrument aboard ESA's SMOS mission.
A coupled Electromagnetic-Mechanical analysis of next generation Radio Telesc...Altair
This work considers the design of large and complex receivers used in the field of radio astronomy, e.g. for the Square Kilometer Array (SKA) project. The purpose of this work is to consider a coupled simulation where the electromagnetic analysis, performed with the computational electromagnetic software package FEKO, is enhanced by the structural analysis offered by HyperWorks products such as HyperMesh and Optistruct. External influences such as gravity, wind-loading and thermal properties will be taken into account. This will enhance the electromagnetic simulation results, thereby aiding designers to mitigate these environmental effects.
Speakers
Dr. Danie Ludick, Postdoctoral researcher, Stellenbosch University
Evaluation of the Theoretical Problems with Building Downwash Using A New Met...Sergio A. Guerra
While the current EBD method is the best available option to determine correct building dimensions in the model, a different method was suggested by EPA in the 2011 Memo: Model Clearinghouse Review of EBD for AERMOD. Attachment B to the 2011 Memo includes an assessment of the Alcoa Davenport Works EBD Study. In this evaluation EPA compared wind tunnel observations with AERMOD derived concentrations. However, this evaluation has important shortcomings. First, to carry out this comparison between wind tunnel and AERMOD concentrations, it is necessary to collect velocity profiles that include longitudinal and vertical turbulent intensity measurements upwind of the stack. These data were not available for the EPA evaluation of the Alcoa Davenport Works EBD Study. Second, the wind tunnel model operating conditions were converted to full scale conditions by using exact similarity. However, exact similarity is not used to specify model operating conditions since only momentum ratios are matched but not buoyancy ones. Whereas EPA did not provide important details on how this study was performed, this paper outlines how to properly carry out this new method where AERMOD is used to determine equivalent building dimensions. The viability of this new method was also evaluated and discussed.
In this deck from the HPC User Forum at Argonne, Andrew Siegel from Argonne presents: ECP Application Development.
"The Exascale Computing Project is accelerating delivery of a capable exascale computing ecosystem for breakthroughs in scientific discovery, energy assurance, economic competitiveness, and national security. ECP is chartered with accelerating delivery of a capable exascale computing ecosystem to provide breakthrough modeling and simulation solutions to address the most critical challenges in scientific discovery, energy assurance, economic competitiveness, and national security. This role goes far beyond the limited scope of a physical computing system. ECP’s work encompasses the development of an entire exascale ecosystem: applications, system software, hardware technologies and architectures, along with critical workforce development."
Watch the video: https://wp.me/p3RLHQ-kSL
Learn more: https://www.exascaleproject.org
and
http://hpcuserforum.com
Sign up for our insideHPC Newsletter: http://insidehpc.com/newsletter
Overview of the FlexPlan project. Focus on EU regulatory analysis and TSO-DSO...Leonardo ENERGY
Webinar recording at https://youtu.be/4s2GGlu-ylc
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In this video from the 2014 HPC User Forum in Seattle, Igor Bolotnov from North Carolina State University presents: Multiphase Flow Modeling and Simulation: HPC-Enabled Capabilities Today and Tomorrow.
Learn more: http://insidehpc.com/video-gallery-hpc-user-forum-2014-seattle/
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In this talk the expected science benefits are discussed first by John Carpenter; then complexities of Systems Engineering and why those processes will be needed are talked about by Juande Santander-Vela; and finally, the Project Management issues of this upgrade are considered by Carla Crovari.
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Felix Langley, Network Technical Head at Network Rail, gave an insight into the diverse array of power engineering on the UK Railway, including AC/DC electrification, SCADA systems and the non-traction power supplies that feed signalling systems, points heating and level crossings.
Structural Health Monitoring: The paradigm and the benefits shown in some mon...Full Scale Dynamics
SHM systems for civil infrastructure have two broad purposes and
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For diagnosis, to:
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• Evaluate ’servicability’ –e.g. user comfort/safety
• Provide a feedback loop to design and loading codes
For prognosis
• Assess structural safety after trauma (e.g. earthquake/impact/bridge scour)
• Track long term degradation to aid maintenance decisions
• Detect ’damage’? –In rare cases outside lab and simulation: please tell me!
• Provide warning of impending failure? (and then bury the incident)
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Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
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1. CLIC Accelerator: status, plans
and outlook
Philip Burrows
John Adams Institute
Oxford University
On behalf of the CLIC Accelerator Collaboration
Thanks to all colleagues for materials
1
3. Outline
3
• Brief context and introduction
• Reminder of CLIC CDR 2012
• Rebaselining + project staging
• R&D status + highlights
• Strategic plan 2018/19 and beyond
• Outlook
Apologies for skipping many results + details!
9. CDR tunnel layout
9
DRIVE BEAM LOOPS
DRIVE BEAM INJECTOR
BYPASS TUNNEL
e- INJECTION DESCENT TUNNEL
DAMPING RINGS
MAIN BEAM INJECTOR
INTERACTION REGION
DRIVE BEAM DUMPS
COMBINER RINGS
TURN AROUND
e+ INJECTION DESCENT TUNNEL
FRANCE SWITZERLAND
CLIC SCHEMATIC(not to scale)
e+ SIDEe- SIDE
LHC
INJECTION TUNNEL
Sands and gravelsMolasseMoraines
Limestones
≈ 1km
≈100m
10. CDR
10
• Pre-Higgs discovery
• Optimised design for 3TeV, but not lower energies
• First look at power/energy requirements
• Some industrial costing, overall cost not
optimised
• Some component reliability studies
• X-band demonstration limited by test capacity
• Initial system tests
Already a lot more has been (and will be) done!
15. Beyond the CDR: current status
15
Develop a Project Plan for a staged implementation
of CLIC, consistent with LHC findings, as an option
for CERN in post-LHC era – for consideration in next
European Strategy update 2019/20
•Update physics studies in light of LHC results
•Complete key technical feasibility R&D
•Perform more system tests + verification
•More advanced industrialisation studies
•Rebaseline, cost/staging strategy with a 20-30 year
perspective
16. Rebaselining: goals
16
Optimize machine design w.r.t. cost and power for:
~ 380 GeV (optimised for Higgs + top physics)
~ 1500 GeV
3000 GeV (working assumption, pending LHC results)
for various luminosities and safety factors
Expect to make significant cost and power reductions for the
initial stages
Choose new staged parameter sets, with a corresponding
consistent upgrade path, also considering the possibility of
the initial-stage being klystron-powered
21. Rebaselining: ongoing studies
21
Optimize drive beam accelerator klystron system
Eliminated electron pre-damping ring (better e- injector)
Systematic optimization of injector-complex linacs
Optimize / reduce power overhead estimates
Use of permanent or hybrid magnets for the drive beam
(order of 50,000 magnets)
… … …
22. Drive beam quadrupoles (40 MW @ 3 TeV)
22
High energy quad – Gradient very high
Low energy quad – Very large dynamic range
26. Main achievements of CTF3
26
Drive beam generation:
•Linac operation (4A) with full beam loading
•Phase-coding of beam with sub-harmonic buncher system
•Factor of ~8 current amplification by beam recombination
•Power extraction from drive beam at 2 x CLIC nominal
Two-beam test stand + TBL:
•2-beam acceleration in CLIC structures up to 1.5 x nominal
•Drive-beam stable deceleration to 35% of initial energy
•12 GHz RF power @ ~ 1 GW in string of 13 decelerators
30. CTF3 programme 2016
30
Power production:
stability + control of RF profile (beam loading comp.)
RF phase/amplitude drifts along TBL
PETS switching at full power
beam deceleration + dispersion-free steering in TBL
routine operation
Drive-beam phase feed-forward prototype system
Beam orbit stabilisation/control
…
34. High-gradient structure tests
34
• Results generally very promising
• Understanding of breakdown mechanism improving
• Numbers of structures still limited
• Limited experience with industrial production
• Gain more experience in conditioning / acceptance testing
• Exploring industrial-scale fabrication
• Exploring potential applications (XFEL, medical … )
• NB: availability of high-power RF test capacity
35. NEXTEF at KEK
ASTA at SLAC
… remain important,
also linked to testing
of X-band structures
from Tsinghua and
SINAP
Previous:
Scaled 11.4 GHz
tests at SLAC and KEK.
Xbox1 in b. 2013
N.CatalanLasheras
CTF3 klystron gallery
CTF2 Dog-Leg in 2001
430 kVmodulator
50 MW Klystron
RFPulse
compressor LLRF
Vacuum
controllers
Xbox2 in b. 150
Spectrometer
Crab cavity
Xbox3 in b. 150
Very significant increase of test-capacity:
First commercial 12 GHz klystron systems available
Confidence that one can design for good (and
possibly better) gradient performance
As a result: now possible to consider X-band for
smaller-scale accelerator systems
X-band test stands
36. • X-band technology appears interesting for compact, relatively low
cost FELs – new or extensions
– Logical step after S-band and C-band
– Example similar to SwissFEL: E=6 GeV, Ne=0.25 nC, σz=8µm
• Use of X-band in other projects will support industrialisation
– They will be klystron-based, additional synergy with
klystron-based first energy stage
• Collaborating on use of X-band in FELs
– Australian Light Source, Turkish Accelerator Centre, Elettra,
SINAP, Cockcroft Institute, TU Athens, U. Oslo, Uppsala
University, CERN
• Share common work between partners
– Cost model and optimisation
– Beam dynamics, e.g. beam-based alignment
– Accelerator systems, e.g. alignment, instrumentation…
• Define common standard solutions
– Common RF component design, -> industry standard
– High repetition rate klystrons (200->400 Hz now into test-
stands)
Important collaboration for X-band
technology
Background (Shanghai Photon Science Center)
Compact XFELSXFEL
580m
Possible X-band FELs
37. • X-band technology appears interesting for compact, relatively low
cost FELs – new or extensions
– Logical step after S-band and C-band
– Example similar to SwissFEL: E=6 GeV, Ne=0.25 nC, σz=8µm
• Use of X-band in other projects will support industrialisation
– They will be klystron-based, additional synergy with
klystron-based first energy stage
• Collaborating on use of X-band in FELs
– Australian Light Source, Turkish Accelerator Centre, Elettra,
SINAP, Cockcroft Institute, TU Athens, U. Oslo, Uppsala
University, CERN
• Share common work between partners
– Cost model and optimisation
– Beam dynamics, e.g. beam-based alignment
– Accelerator systems, e.g. alignment, instrumentation…
• Define common standard solutions
– Common RF component design, -> industry standard
– High repetition rate klystrons (200->400 Hz now into test-
stands)
Important collaboration for
advancing X-band technology
Background (Shanghai Photon Science Center)
Compact XFELSXFEL
580m
Possible X-band FELs
38. 38
Goals and plans for 2016-19 are well defined + aligned with European Strategy
Prepared to align with LHC physics outcomes as results become available
•Aim to provide optimized staged approach up to 3 TeV with costs and power not
excessive compared with LHC
•Very good progress on X-band technology, better availability of power sources,
and increased understanding of structure design parameters
– Applications in smaller systems; FEL linacs key example – with considerable interest in the CLIC
collaboration
•Also recent good progress on performance verifications, drive beam (CTF3), main
beam emittance conservation (FACET) and final focus studies (ATF)
– CTF3 running planned until end 2016; need a strategy for system tests beyond
•Technical developments of key parts well underway – with increasing
involvement of industry – largely limited by funding
•Collaborations for CLIC accelerator and detector & physics studies are growing
Summary
39. 2013-18 Development Phase
Develop a Project Plan for a
staged implementation in
agreement with LHC findings;
further technical developments
with industry, performance
studies for accelerator parts and
systems, as well as for
detectors.
2018-19 Decisions
On the basis of LHC data
and Project Plans (for CLIC and
other potential projects as
FCC), take decisions about next
project(s) at the Energy
Frontier.
4-5 year Preparation Phase
Finalise implementation
parameters, Drive Beam Facility
and other system verifications, site
authorisation and preparation for
industrial procurement.
Prepare detailed Technical
Proposals for the detector-systems.
2024-25 Construction Start
Ready for full construction
and main tunnel excavation.
Construction Phase
Stage 1 construction of CLIC, in
parallel with detector
construction.
Preparation for
implementation of further
stages.
Commissioning
Becoming ready for data-
taking as the LHC
programme reaches
completion.
DRIVE BEAM
LINAC
CLEX
CLIC Experimental Area
DELAY
LOOP
COMBINER
RING
CTF3 – Layout
10 m
4 A – 1.2 ms
150 MeV
28 A – 140 ns
150 MeV
Two-Beam Test Stand (TBTS)
Test Beam Line (TBL)
CLIC roadmap
44. • Surface magnetic field
– Pulsed surface heating => material fatigue => cracks
• Field emission due to surface electric field
– RF break downs
– Break down rate => Operation efficiency
– Local plasma triggered by field emission => Erosion of
surface
– Dark current capture
=> Efficiency reduction, activation, detector backgrounds
• RF power flow
– RF power flow and/or iris aperture have a strong impact on
achievable Eacc and on surface erosion. Ongoing studies.
Limitations on gradient
45. CLIC structures:
•Two TD26CC built and tested by KEK. Still superb
production
•One TD26CC built by CIEMAT. Next step after PETS.
•Two T24s built by PSI in their production run.
Vacuum brazing alternative, benchmark for their
production line.
•One T24 built by SINAP. Potentially leads to large X-
band installation.
•Whole structure in industry – Technical
specifications are under preparation.
Industrialization, cost estimate.
Other related structures:
•Structure in halves by SLAC. Potentially cheaper,
hard materials, preconditioned surfaces possible.
•Choke-mode damping by Tsinghua. Potentially
cheaper
•Four XFEL structures by SINAP. New application with
large potential.
•High-gradient proton funded by KT (CERN
technology transfer). New application.
Structures in the pipeline