CLIC Status. Philip Burrows. John Adams Institute Oxford University
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1 CLIC Status Philip Burrows John Adams Institute Oxford University 1
2 CLIC Collaboration 29 Countries over 70 Institutes Accelerator collaboration Detector collaboration Accelerator + Detector collaboration
3 New accelerator collaboration CLIC Collaboration partners joining (2013): 29 Countries over 70 Institutes The Hebrew University Jerusalem, Vinca Belgrade, ALBA/CELLS, Tartu University, NCBJ Warsaw, Shandong University, Ankara University Institute of Accelerator Technologies (IAT) Accelerator collaboration Detector collaboration operative with 22 institutes Detector collaboration Accelerator + Detector collaboration
4 Link: registered Main elements: Open high energy frontier session session, including hadron options with FCC Accelerator sessions focusing on collaboration efforts and plans , parallel sessions and plenary High Gradient Applications for FELs, industry, medical Physics and detector sessions on current and future activities Collaboration and Institute Boards 4
5 CLIC Workshop 2014
6 CLIC Organisation CERN LC project leader: Steinar Stapnes CLIC accelerator: Collaboration Spokesperson: CLIC/CTF3 technical coordinator: Collaboration Board Chair: PNB Roberto Corsini Lenny Rivkin CLIC detector + physics: Collaboration Spokesperson: Collaboration Board Chair: Lucie Linssen Frank Simon 6
7 CLIC opening presentations Introduction + accelerator overview: PNB Detector + physics: Ivanka Bozovic-Jelisavcic 7
8 CLIC detector return yoke with Instrumentation for muon ID complex forward region with final beam focusing strong solenoid 4 T - 5 T fine grained (PFA) calorimetry, Λ i, 6.5 m all-silicon tracker ultra low-mass vertex detector with 25 μm pixels Lucie Linssen 8
9 CLIC opening presentations Introduction + accelerator overview: PNB Detector + physics: Ivanka Bozovic-Jelisavcic 5-year R&D program technical goals: Daniel Schulte 9
10 CLIC Layout 3 TeV Drive Beam Generation Complex Main Beam Generation Complex 10
11 11
12 CDR (2012) 12
13 CDR (2012) e+ INJECTION DESCENT TUNNEL e- INJECTION DESCENT TUNNEL COMBINER RINGS DRIVE BEAM INJECTOR DRIVE BEAM LOOPS 100m BYPASS TUNNEL INTERACTION REGION MAIN BEAM INJECTOR DAMPING RINGS 1km DRIVE BEAM DUMPS TURN AROUND Limestones Moraines Molasse Sands and gravels INJECTION TUNNEL CLIC SCHEMATIC (not to scale) e- SIDE LHC e+ SIDE 13 FRANCE SWITZERLAND
14 CDR (2012) 14
15 Pre-Higgs discovery CDR (2012) 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
16 European PP Strategy (2013) High-priority large-scale scientific activities: LHC + HL-LHC Post-LHC accelerator at CERN ILC Neutrinos 16
17 European PP Strategy (2013) d) To stay at the forefront of particle physics, Europe needs to be in a position to propose an ambitious post-lhc accelerator project at CERN by the time of the next Strategy update, when physics results from the LHC running at 14 TeV will be available. 17
18 European PP Strategy (2013) CERN should undertake design studies for accelerator projects in a global context, with emphasis on proton-proton and electron-positron high energy frontier machines. These design studies should be coupled to a vigorous accelerator R&D programme, including high-field magnets and highgradient accelerating structures, in collaboration with national institutes, laboratories and universities worldwide. 18
19 Beyond the CDR: next 5 years Present CLIC project as a credible option for CERN in post-lhc era ( > ) for consideration in next European Strategy update 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 year perspective 19
20 Physics context Energy-frontier capabilities for potential new physics that may emerge from LHC 20
21 Physics context Higgs + top physics capabilities, including added value of high-energy measurements 21
22 Higgs studies update To be presented and discussed by Ivanka, Frank and colleagues at this workshop 22 (Roloff et al)
23 Rebaselining Exercise started for CDR 23
24 Rebaselining: goals Optimize machine design w.r.t. cost and power for: 350 GeV ~ 1500 GeV 3000 GeV (CDR) 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 24
25 Rebaselining: ongoing studies Use of permanent or hybrid magnets for the drive beam (order of 50,000 magnets) Optimize drive beam accelerator klystron system Eliminate electron pre-damping ring (better electron injector) Systematic optimization of injector-complex linacs Power consumption: optimize / reduce overhead estimates 25
26 Drive-beam adjustable permanent magnets: basic engineering concept PM Block Steel Steel Pole Non-magnetic support Norbert Collomb
27 Measured Field Quality
28 Rebaselining: ongoing studies Use of permanent or hybrid magnets for the drive beam (order of 50,000 magnets) Optimize drive beam accelerator klystron system Eliminate electron pre-damping ring (better electron injector) Systematic optimization of injector-complex linacs Power consumption: optimize / reduce overhead estimates See Daniel s talk this afternoon 28
29 High-gradient structure tests 29
30 High-gradient structure tests Results 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 several potential applications (XFEL, medical ) Availability of test capacity 30
31 X-band test stands ASTA (SLAC) + NEXTEF (KEK) Significant expansion in test capability at CERN (as well as collaborators) Xbox-3: 4 turn-key 6 MW, GHz, 400Hz power stations (klystron/modulator) have been ordered from industry. The first unit is scheduled to arrive at CERN in October The full delivery will be completed before July
32 CLIC Test Facility (CTF3) COMBINER RING test accelerator to demonstrate CLIC technology DELAY LOOP TBTS CLEX DRIVE BEAM LINAC TBL Frank Tecker
33 CTF3 33
34 CTF3 Phase feed-forward, DB stability studies Beam loading/bdr experiment Two-Beam Module, Wake-field monitors, Two-beam studies RF pulse shaping Power production, RF conditioning/testing with DB & further decelerator tests 34 CLIC Diagnostics tests
35 Main achievements of CTF3 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 ~ 1 GW in string of 13 decelerators 35
36 CTF3 programme Drive beam: emittance + bunch-length control (x8 combination) stability: current, RF amplitude + phase lot of feedbacks in development control of beam losses phase feed-forward experiment 36
37 Drive beam phase feed-forward Schulte 37
38 Drive beam phase feed-forward Skowronski 38
39 CTF3 phase FF prototype (Oxford, CERN, Frascati) 39
40 CTF3 phase FF prototype (Oxford, CERN, Frascati) 40
41 CTF3 phase FF prototype (Oxford, CERN, Frascati) 41
42 CTF3 programme 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 42
43 CTF3 programme Diagnostics tests: main-beam cavity BPMs (TBTS) drive-beam stripline BPMs (TBL) electro-optic bunch-profile monitors (CALIFES) optical transition radiation beam size monitor diamond beam-loss detectors significant overlap with ILC 43
44 CTF3 programme CLIC Module tests: 3 modules to be mechanically characterised + tested: 44
45 Test-area (simulating the tunnel) Heating coils Range for air temperature and speed: T air = C v air = m/s Air speed sensors installed in the middle of the room Air speed sensors Cooling coils
46 CTF3 programme CLIC Module tests: 3 modules to be mechanically characterised + tested: Active alignment, fiducialisation + stabilisation (PACMAN) One module to be installed + tested at CLEX (June) 46
47 ATF/ATF2 (KEK) 47
48 CLIC + ATF/ATF2 Demonstration of nanometer-scale beam (~60nm achieved) Beam stabilisation at nanometer level Beam tuning techniques Beam jitter characterisation and amelioration Beam feedback + feed-forward Magnet development (hybrid QD0, PM octupoles) Beam instrumentation: BPMs, transverse beam size DR extraction kicker tests ATF session Tuesday 48
49 Ground-motion sensor array
50 Emittance Orbit/Dispersion Beam tuning at FACET (SLAC) Before correc on A er 1 itera on Beam profile measurement 50
51 CLIC roadmap 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. 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. Construction Phase Stage 1 construction of CLIC, in parallel with detector construction. Preparation for implementation of further stages. CTF3 Layout DELAY LOOP 4 A 1.2 ms 150 MeV COMBINER RING 10 m DRIVE BEAM LINAC CLEX CLIC Experimental Area 28 A 140 ns 150 MeV Two-Beam Test Stand (TBTS) Test Beam Line (TBL) Decisions On the basis of LHC data and Project Plans (for CLIC and other potential projects), take decisions about next project(s) at the Energy Frontier Construction Start Ready for full construction and main tunnel excavation. Commissioning Becoming ready for datataking as the LHC programme reaches completion.
52 Applications of high-gradient tech. High Gradient NC Technology ready for use at a reasonable scale (look also outside our field) Explore possibilities where compactness, costs, performance etc can be favourable Very large interest among existing and new collaborators, and our industrial contacts
53 Drive Beam injector front end developments First klystron development contract ready to be signed Lots of progress on the modulator design Gun designed finished, ready to construct SHB design finished, ready to be build Overall DB injector design well advanced Gun test facility under construction 500 MHz Modulator-klystrons, 1 GHz, 15 MW Diagnostics Gun SHB PB Buncher Acc. Structures ~ 140 kev ~ 3 MeV ~ 12 MeV
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