Background Applications to HL-LHC LARP2 Proposal Three Scenarios Benefits for HL LHC Budget Wideband Feedback Systems Ideas for continuity in the LARP2 Era J.D. Fox 1 LARP Ecloud Contributors: J. Cesaratto 1 , J. Dusatko 1 , J. D. Fox 1 , J. Goldfield 1 , J. Olsen 1 , M. Pivi 1 , N. Redmon 1 , C. Rivetta 1 , O. Turgut 1 D. Aguilera 2 , G. Arduini 2 , H. Bartosik 2 , S. Calvo 2 ,W. Hofle 2 , G. Iadarola 2 , G. Kotzian 2 , K. Li 2 , E. Montesinos 2 , G. Rumolo 2 , B. Salvant 2 , U. Wehrle 2 , M. Wendt 2 , C. Zanini 2 S. De Santis 3 , H. Qian 3 D. Alesini 4 , A. Drago 4 , S. Gallo 4 , F. Marcellini 4 , M. Zobov 4 M.Tobiyama 5 1 Accelerator Research Department, SLAC 2 BE-ABP-ICE Groups, CERN 3 Lawrence Berkeley Laboratory 4 LNF-INFN 5 KEK J. D. Fox CM 26 May 2016 1
� � � Background Applications to HL-LHC LARP2 Proposal Three Scenarios Benefits for HL LHC Budget � WBFS for intra-bunch Instability Control ,'B( C23145( ,4?E( %>?@<A( %>?@<A( "2A>?@( '<D45( /5<>7( %G*( G%*( ,?31( '5<34662>A( %EF( ;>9( ;>9( 75?>6H4564(( 6?EF@49( 3?@38@?749( 3<554372<>( F54#F5<346649( F54#9267<572<>( 952H4(62A>?@( F<6272<>( F<6272<>( 3<554372<>(9?7?( 62A>?@( � !-./'! � ( Control of Ecloud and Impedance-driven transverse Intra-bunch instabilities - efforts since 2009 GHz Bandwidth Digital Signal Processing via reconfigurable architecture beam studies - excitations studies- demo system with feedback SLAC and CERN resources , Opportunity for Graduate Student participation, Ph.D. Thesis Extensive simulation and modeling effort Testbed for concept validation, data to estimate full-function system for any machine J. D. Fox CM 26 May 2016 2
Background Applications to HL-LHC LARP2 Proposal Three Scenarios Benefits for HL LHC Budget 3 coupled research areas Technology of Feedback System ( Engineering) Receiver, equalizer, pickup, Frequency/time response and noise floor A/D, D/A and DSP system functionality Control filters, diagnostics User Interface and operational flexibility Timing and Synchronization - functionality, flexibility, synchronization with energy ramp Power Amplifiers - frequency, time response, power output Beam Kickers, bandwidth, shunt impedance, added broadband impedance Studies of Feedback on Beam Dynamics ( Beam Physics) Active machine measurement program Development of techniques to measure performance Limited function Demo system, validate concepts Development of special beams (low intensity, linear lattice) for feedback tests Measure Beam/System responses, compare with Simulation models ( Control Theory) FIR and Maxtrix Control (MIMO) Methods for Q26, Q20 SPS Optics Development of MD/simulation data analysis methods Validate measurements against models Reduced Model and Control design formalism ( Ph.D. Thesis) Evaluate architecture (two pickup/two kicker system advantages) J. D. Fox CM 26 May 2016 3
Background Applications to HL-LHC LARP2 Proposal Three Scenarios Benefits for HL LHC Budget Potential Applications at CERN (W. Hofle, K. Li, et al) W. Hofle / K. Li Transverse Feedback in the HL-LHC Era 5th Joint HighLumi LHC - LARP Meeting Instabilities: Potential for New Feedbacks PS: Required Rise time � Instability for high intensity TOF beam s bandwidth SPS: PS (TOF) ~ 800 MHz 50 turns � Single bunch vertical instability for high SPS (h plane) ~ 20 MHz 750 turns intensity 25 ns beam 28.10.2015 LHC: � 500 MHz SPS (v plane) 150 turns � Instabilities at injection for nominal 25 ns beam � 2 GHz LHC (injection) 250 turns � Instabilities at flat top for nominal 25 ns beam LHC ( squeeze) > 20 MHz ? 10’000 turns � Control of the doublet beam for LHC ( doublet) > 100 MHz ? 50 turns scrubbing HL-LHC: � 1.75 GHz HL-LHC (crabs) 10’000 turns � Instabilities from crab cavity HOMs See K. Li, 15.10.2015 , LIU-HighLumi Day, https://indico.cern.ch/event/437662/ 29 J. D. Fox CM 26 May 2016 4
Background Applications to HL-LHC LARP2 Proposal Three Scenarios Benefits for HL LHC Budget Where Are we today? What is needed in FY17 and beyond? Today -Demonstrator hardware system, upgraded post LS1 Mode 0 control demonstrated Two stripline kickers in place, 4x250W 1 Ghz amplifiers FIR based single, doublet, train controllers Many control concepts simulated, studied via head-tail, reduced models Ready for intensive MD program with strong, coupling to CERN ABP groups CERN is investing in vacuum kicker structures, cable plant, amplifiers and people What’s not there? No energy ramp synchronization -deferred due to resources Slotline kicker - delayed due to resources Data to understand limits of FIR control for Q20 and Q20-like optics Simulations/studies of growth rates vs. energy in ramp What do we need to do in FY2017, and beyond, via LARP2 CERN September 2016 Review report will guide Continued MD studies with HL-like beams Continued refinement, tests of robust controllers Slotline fabrication, installation, commissioning Validate measurements against models full-featured architecture study, design of full featured platform study value to LHC-HL complex, propose operational implementations J. D. Fox CM 26 May 2016 5
Background Applications to HL-LHC LARP2 Proposal Three Scenarios Benefits for HL LHC Budget Research and Technology Timeline from DOE review O@#% O@!% !"#$%%&%%!"#'% !"#E%%&%%!"#F% !"!"% !"#G%%&%%!"#H%%&%%!"#I% ()*+%,-+.+./0)% ()*+%,-+.+./0)% 7ABB&7A<3C+<%% @.A=2)D% 1234)-%5)0+-.6789%% J2=)98<=%7))=9834% 7ABB&7A<3C+<% :;08<=%,-+.+./0)% @/D.)*%N)D.D% ()D2K<&789-238C+<% @.A=2)D6()L)B+0M% >)8*%?%7))=9834% >)8*%?%7))=9834% >)8*%?%7))=9834% @2*AB8C+<D% @2*AB8C+<D% @2*AB8C+<D% • ()*+%P+**2DD2+<)=% • Q(D%W2.X%<)W%X8-=W8-)% • 7ABB&7A<3C+<%J2=)98<=%% • @/D.)*%T<.)K-8C+<% • Q(D%R8<M&7)9M%!"#$% • QABC&9A<3X%+0)-8C+<% %%%%%7))=9834%()D2K<&789-238C+<% • 7ABB%2<.)-Z83)%W2.X%P:5\%% • 1234)-%()D2K<S%789-238C+<% • (8.8%8<8B/D2DS%*+=)BD%8<=% • P+<C<A)%Q(%D.A=2)D% %%%%%P+<.-+B%5++*%% 8<=%T<D.8BB8C+<% D2*AB8C+<%.++BD% • [8B2=8.)%:<)-K/%58*0% • :DC*8C+<%+Z%@/D.)*%% • (8.8%U<8B/D2DS%Q+=)BD%8<=% • @/D.)*%D0)32Y38C+<D%8<=% • U<8B/D2DS%*+=)BD%8<=%D2*AB8C+<% %%%%%%O2*2.D%8<=%,)-Z+-*8<3)% @2*AB8C+<%N++BD% 380892B2C)D% .++BD% • OVP]%%%,@]%%@,@]% • :;08<=%V8-=W8-)%P80892B2./% • 7ABB&ZA<3C+<%J2=)98<=% • Q(D%W2.X%<)W%V8-=W8-)% 7))=9834%N)3X<+B+K/% ()L)B+0*)<.M% Task, resources, M&S items estimated multiple times in DOE and CERN Reviews Manpower estimated many times, budgeted as part of project preparation J. D. Fox CM 26 May 2016 6
Background Applications to HL-LHC LARP2 Proposal Three Scenarios Benefits for HL LHC Budget Scenario 1 - $100K/year This is a small fraction of existing FY2016 effort MD efforts require travel, realistic % FTE to take data, analyze data Technology efforts require realistic % FTE engineering What could be done lifeline support for Graduate Ph.D. Thesis - wrap up limited travel for Student effort is mostly simulation studies, simulation of control techniques minimal MD effort or analysis of data Other Impacts Engineering, Beam Physics team transition to other projects Frozen state of Demo system Loss of continuity and project momentum Difficult to re-create team if funding available in future year Out-of-Box Ideas- possible use of US-Japan, outside NSF , DOE or GARD funds, CERN direct support to help with project continuity J. D. Fox CM 26 May 2016 7
Background Applications to HL-LHC LARP2 Proposal Three Scenarios Benefits for HL LHC Budget Scenario 2 - $250K/year This is a fraction of existing FY2016 effort difference from Scenario #1 is small fractional Staff FTE MD efforts require travel, realistic % FTE to take data, analyze data Technology efforts require realistic % FTE engineering What could be done Support for Graduate Ph.D. Thesis effort and supervision roughly 25% FTE Accelerator Physics and travel funding for MD effort Simulation studies of control methods, limits of FIR techniques Travel for limited MD studies coordination on fabrication, testing and commissioning of slot line kicker Other Impacts Minimal accelerator Physics time to do MD studies, analysis, and Engineering Staff transitions to other projects Frozen state of Demo system Difficult to expand or continue Demo System or hardware effort if funding available in future year Out-of-Box Ideas- possible use of US-Japan, outside NSF , DOE or GARD funds, CERN funds to help support project Technology R&D . Toohig Fellow could be significant if extra funds for a Fellow were available J. D. Fox CM 26 May 2016 8
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