Presentation is loading. Please wait.

Presentation is loading. Please wait.

Muon Collider R&D in the US. Muon Collider Program  Closely coupled with R&D on the Neutrino Factory u IDS-NF  The R&D program is now encompassed in.

Similar presentations


Presentation on theme: "Muon Collider R&D in the US. Muon Collider Program  Closely coupled with R&D on the Neutrino Factory u IDS-NF  The R&D program is now encompassed in."— Presentation transcript:

1 Muon Collider R&D in the US

2 Muon Collider Program  Closely coupled with R&D on the Neutrino Factory u IDS-NF  The R&D program is now encompassed in a 5 Year Plan u Proposal submitted to DOE in December, 2008  Two Main Thrusts u Support on-going international commitments s MICE s IDS u Deliver a Muon Collider Design Feasibility Study by 2013 Alan Bross UKNF Meeting Lancaster April 22, 20092

3 Muon Complex Evolution At Fermilab Starting with a high-intensity proton source: Project X We see a natural evolution of “muon” program for Fermilab Project X  Low-Energy NF (pointing to Homestake)  High- Energy NF  1.5 TeV MC  4 TeV MC 3Alan Bross UKNF Meeting Lancaster April 22, 2009

4 Part I: IDS-NF 4Alan Bross UKNF Meeting Lancaster April 22, 2009

5 IDS-NF Option: 4 GeV -Factory  Fermilab to DUSEL (South Dakota) baseline -1290km  4 GeV muons yield appropriate L/E  Use a magnetized totally active scintillator detector Ankenbrandt, Bogacz, Bross, Geer, Johnstone, Neuffer, Popovic Fermilab-Pub-09-001-APC; Submitted to PRSTAB Geer, Mena, Pascoli Phys. ReV D 75, 093001 (2007) Bross, Ellis, Geer, Mena, Pascoli Phys. ReV D 77, 093012 (2008) 5Alan Bross UKNF Meeting Lancaster April 22, 2009

6 The Energy Frontier via      Collisions  MC: One Concept  4 TeV Center-of-Mass Rapid-Cycling Synchrotron Acceleration 6Alan Bross UKNF Meeting Lancaster April 22, 2009

7 Muon Collider - Motivation Alan Bross UKNF Meeting Lancaster April 22, 20097 Reach Multi-TeV Lepton-Lepton Collisions at High Luminosity Muon Colliders may have special role for precision measurements. Small  E beam spread – Precise energy scans Small Footprint - Could Fit on Existing Laboratory Site

8 The Supersymmetric Particle Zoo Alan Bross UKNF Meeting Lancaster April 22, 20098  Independent of actual supersymmetric mass scale and the reach of the ILC, the 2004 CLIC Study conclusions are still valid u “A Multi-TeV machine is needed for extended coverage of the mass range

9 The Gospel According to Snowmass Alan Bross UKNF Meeting Lancaster April 22, 20099 Do we really need a multi-TeV COM Lepton Collider?

10 Alan Bross UKNF Meeting Lancaster April 22, 200910 But the Physics Case is Not Static A typical sample “compressed” Higgs and superpartner mass spectrum with  DM h 2 = 0.11 An unfortunate feature, quite common to this scenario for dark matter, is that no visible superpartners would be within reach of a linear collider with √s = 500 GeV Stephen Martin hep-ph/0703097 March, 2007 Strong Case for considering Multi-TeV Lepton Collider

11 U.S. Muon Acceleration R&D Community The Usual Suspects

12 Organization We have been around a while – “You can’t tell the players without a score card” NFMCC (Neutrino Factory & Muon Collider Collab.) –National collaboration funded since 1999. –Pursues Neutrino Factory & Muon Collider R&D. –NF R&D pursued with international partners MCTF (Muon Collider Task Force) –Task Force established at Fermilab in 2006 –Pursues Muon Collider R&D, utilizing FNAL assets and extends & complements the NFMCC program MCCC (Muon Collider Coordinating Committee) –Leadership of NFMCC (Bross, Kirk, Zisman) and MCTF (Geer, Shiltsev) –Co-ordinates NFMCC & MCTF plans to optimize the overall program … has worked well and resulted in a joint 5 year plan for future activities. 12Alan Bross UKNF Meeting Lancaster April 22, 2009

13 Muon Acceleration R&D Organization  R&D Program carried out by two groups u Neutrino Factory and Muon Collider Collaboration u Fermilab Muon Collider Task Force MUON COLLIDER R&D CO-ORD COMMITTEE MUON COLLIDER R&D PROGRAM NFMCC LEADERSHIP A. Bross, H. Kirk M. Zisman MCTF LEADERSHIP S. Geer V. Shiltsev + MuCool MICE IDS-NF Low-Energy NF Design & Sim. MTA Beam Line HP RF Helical Cooling High-T c SC Design & Sim NEUTRINO FACTORY R&D PROGRAM 13Alan Bross UKNF Meeting Lancaster April 22, 2009

14 The Muon Collider Addressing the Technological Challenges

15 Parameters of Different MC options Low Emit.High Emit.MCTF07MCTF08  s (TeV)1.5 Av. Luminosity (10 34 /cm 2 /s) *2.711.33-2 Av. Bending field (T)1066 Mean radius (m)361.4500500  495 No. of IPs422 Proton Driver Rep Rate (Hz)651340-60 Beam-beam parameter/IP0.0520.0870.1  * (cm)0.511 Bunch length (cm)0.511 No. bunches / beam1011 No. muons/bunch (10 11 )12011.3 Norm. Trans. Emit. (  m)2.12512.3 Energy spread (%)10.10.2 Norm. long. Emit. (m)0.350.070.14 Total RF voltage (GV) at 800MHz407  10 3  c 0.21** 0.84**  0.3 † Muon survival N  /N  00.31 0.070.2?  + in collision / proton0.047 0.010.03? 8 GeV proton beam power3.62*** 3.21.9-2.8? --------------------------------------------------------------------------- 15Alan Bross UKNF Meeting Lancaster April 22, 2009

16 Muon Collider Facility Alan Bross UKNF Meeting Lancaster April 22, 200916

17 R&D Program Overview II lHigh Power Targetry – NF & MC (MERIT Experiment) lInitial Cooling – NF & MC (MICE (4D Cooling)) l200 (& 805) MHz RF - NF & MC (MuCool and Muon’s Inc)  Investigate RF cavities in presence of high magnetic fields  Obtain high accelerating gradients (~15MV/m)  Investigate Gas-Filled RF cavities lIntense 6D Cooling – MC l RFOFO “Guggenheim” l Helical Channel Cooling (MANX Proposal) l Parametric Resonance Ionization Cooling lBunch Recombination - MC lAcceleration– A cost driver for both NF & MC, but in very different ways l FFAG’s – (EMMA Demonstration) l Multi-turn RLA’s – a BIG cost reducer l RCS for MC lStorage Ring(s) – NF & MC lTheoretical Studies NF & MC l Analytic Calculations l Lattice Designs l Numeric Simulations Alan Bross UKNF Meeting Lancaster April 22, 200917

18 The Experiment Reached 30TP @ 24 GeV  Beam pulse energy = 115kJ  B-field = 15T  Jet Velocity = 20 m/s  Measured Disruption Length = 28 cm  Required “Refill” time is then 28cm/20m/s = 14ms  Rep rate of 70Hz  Proton beam power at that rate is 115kJ *70 = 8MW 18Alan Bross UKNF Meeting Lancaster April 22, 2009

19 The Basic Problem – B Field Effect 805 MHz Studies  Data seem to follow universal curve u Max stable gradient degrades quickly with B field  Re-measured u Same results Gradient in MV/m Peak Magnetic Field in T at the Window >2X Reduction @ required field 19Alan Bross UKNF Meeting Lancaster April 22, 2009

20 805 MHz Imaging 20Alan Bross UKNF Meeting Lancaster April 22, 2009

21 201 MHz Cavity Running Summary I (B=0) Design Gradient Limited by RF Power 21Alan Bross UKNF Meeting Lancaster April 22, 2009

22 201 MHz Cavity Running Summary II (B>0) 22Alan Bross UKNF Meeting Lancaster April 22, 2009

23 Facing the RF B Field Challenge  Three Approaches to a Solution u Reduce/eliminate field emission s Process cavities utilizing SCRF techniques s Material Studies –Surface coatings –Non-Cu bodies u RF cavities filled with High-Pressure gas (H 2 ) s Utilize Paschen effect to stop breakdown u Magnetic Insulation s Eliminate magnetic focusing –Not Yet Tested 23Alan Bross UKNF Meeting Lancaster April 22, 2009

24 High-Gradient RF Operation B Field  Promising indications @ a Solution u SCRF Processing techniques help s Reduce dark current –More advanced techniques (Atomic-Layer-Deposition) may do more u Cavity material properties seem to be important s TiN helps –Coupled with SCRF processing may reduce FE even more s Mo, Be Coatings? u Gas-filled cavities show promise s Operation with beam critical next test 24Alan Bross UKNF Meeting Lancaster April 22, 2009

25 Muon Collider Design Emphasis on Cooling

26 Muon Collider Design Progress  Muon Collider designs start with a NF front- end, but require a much more ambitious cooling channel (6D cooling ~ O(10 6 ) c.f. 4D cooling ~ O(100).  In the last 5 years concepts for a complete end-to-end self con- sistent cooling scheme have been developed u Requires beyond state-of-art components: need to be developed u Hardware development and further simulations need to proceed together to inform choices between alternative technologies  Also progress on acceleration scheme & Collider ring design, but the cooling channel presently provides the main Muon Collider challenge NF FRONT END 26Alan Bross UKNF Meeting Lancaster April 22, 2009

27 A Muon Collider Cooling Scenario Alan Bross UKNF Meeting Lancaster April 22, 200927

28 Guggenheim RFOFO - Simulations RF liquid H 2 solenoid Pavel Snopok

29 Helical Cooling Channel  Magnetic field is solenoid B0+ dipole + quad  System is filled with H 2 gas, includes rf cavities  Cools 6-D (large E means longer path length)  But, incorporating RF is Engineering challenge! 29Alan Bross UKNF Meeting Lancaster April 22, 2009

30 HCC Magnet Design & Prototyping  Helical solenoid (HS): Smaller coils than in a “snake” design u Smaller peak field u Lower cost  Field components in HS determined by geometry u Over constrained u Coil radius is not free parameter  4 Coil Demonstration Model u Validate mechanical structure and fabrication methods u Study quench performance and margins, field quality, quench protection u Use SSC conductor Outer bandage rings Inner bobbin Superconducting coils (one layer, hard bend wound) 30Alan Bross UKNF Meeting Lancaster April 22, 2009

31 Final Cooling  LH2 absorbers tested in MICE  50 T Solenoids u National Very High Field Superconducting Magnet Collaboration s 2 Year $4M program to study HTS conductor and cable Alan Bross UKNF Meeting Lancaster April 22, 200931

32 Acceleration

33 Acceleration - Overview  RLA: get more passes u Ramp linac magnets, get more passes (12) u Non-scaling FFAG arcs: get 2 passes per arc, maybe more  Fast ramping synchrotron (RCS) u Potential for many more passes  FFAG: not studied much as yet for Muon Collider Alan Bross UKNF Meeting Lancaster April 22, 200933

34 0.6 GeV/pas s 3.6 GeV 0.9 GeV 244 MeV 146 m 79 m 2 GeV/pass 264 m 12.6 GeV Initial Acceleration – Neutrino Factory Define beamlines/lattices for all components 34 Alan Bross UKNF Meeting Lancaster April 22, 2009

35 Acceleration -RCS Alan Bross UKNF Meeting Lancaster April 22, 200935

36 The Way Forward Joint NFMCC and Fermilab MCTF 5 Year Proposal to DOE

37 The 5 Year Plan A Proposal Has now been submitted to DOE  A joint US: NFMCC-MCTF Plan u A measured program based on the solid muon accelerator R&D achievements of the last decade u Sufficiently ambitious to make substantial progress before the next round of long-term decisions by the particle physics community u Includes accelerator, physics & detector studies – we also have plans & estimates for physics & detector studies, but will be in a separate proposal)  Meets our existing commitments (NF-RDR, MICE) and in addition will deliver: u MC performance requirements based on physics u A first end-to-end MC simulation u Critical component development & proof-of-principle experiments u A first MC cost estimate 37Alan Bross UKNF Meeting Lancaster April 22, 2009

38 “The 5 Year Plan” (developed by All-US Community, coordinated by MCCC) Goals : I. establish feasibility of a Muon Collider by 2012-13 II. deliver MC-DFS by 2013 and NF-RDR by 2012 III. greatly narrow technology options, end-end simul’s IV. give cost estimates for MC and NF Staged approach: PD  MCTF  NF  MC - perfectly aligned with Fermilab’s long term plan outlined in Steering Group Report and P5 report 38Alan Bross UKNF Meeting Lancaster April 22, 2009

39 5-Year Plan of Muon Accelerator R&D Progress to Date  v1.0 presented to MUTAC in Aug’08  1 hr briefing of D.Kovar and J.Blazey Nov’08  Presented at the Dec’08 DoE review of Accelerator Science u Elaborated coherently in presentations of 4 labs s FNAL, LBNL, BNL and ANL  Formally submitted to DoE in Dec’08 u Current status: “interesting… wait” (CR, ARRA, budget, etc) 39Alan Bross UKNF Meeting Lancaster April 22, 2009

40 Elements of the MC R&D Plan 40Alan Bross UKNF Meeting Lancaster April 22, 2009

41 Resources NOTE: Roll-over in years 4-5 provides an opportunity to initiate post-DFS activities, should the community wish us to proceed to the next step Alan Bross UKNF Meeting Lancaster April 22, 2009  X3 Increase in Effort

42 Muon Collider Technical Foundation after 5 Years From Here to There 42Alan Bross UKNF Meeting Lancaster April 22, 2009

43 Encouraging “Words”

44 Very High Field SC Magnet Collaboration  The immediate goals (2 years): u The immediate goal (2 years) is to understand if Bi 2212 is a suitable vehicle for this task. u develop the technology to build magnets with B>30 T u Funded for 2 years @ $2M/yr 44Alan Bross UKNF Meeting Lancaster April 22, 2009

45 The committee endorses the integrated NFMCC and MCTF 5-year plan with the following goals: - NF RDR - Muon Collider feasibility report which depends on: MC performance requirements based on physics End to end MC simulation Critical component development and testing First cost estimate The collaboration estimates a factor of 3 increase in people resources is required and the committee agrees - Laboratories are not prepared to commit the full increment. The remainder will come from universities and SBIR initiatives - it is not clear to the committee that the expertise is available [ed. Help is Welcome!] We are impressed with the flow of new ideas, but concerned that given limited resources, options must be reduced. April 2009 MUTAC Review “Selected Excerpts ” 45Alan Bross UKNF Meeting Lancaster April 22, 2009

46 MICE  Impressive progress u MICE experimental running (parasitic) u Civil engineering u Instrumentation installation and testing u Magnet design and procurement drives the early steps in the programme. u Cavity  Coordination with the ISIS schedule puts constraints on a complex and demanding programme. Moms will be increasingly important in ensuring reactive scheduling.  Five Year Plan u Six step programme matches both Neutrino and Muon programmes. 46Alan Bross UKNF Meeting Lancaster April 22, 2009

47 MICE  Recommendations  To assess the performance of the 201 MHz RF in the magnetic field levels for MICE to verify the assumption of dark current levels.  Recognising the vital contribution that a timely delivery of MICE step VI will make to both the neutrino factory IDS and a Design Feasibility Study (DFS) for a Muon Collider, this committee recommends that maximum pressure is exerted by the collaboration on UK funding bodies to make a timely decision to fund the entire programme to the aspirational timescale.  Provide an assessment of the timescales and costs of a wedge absorber test MICE 47Alan Bross UKNF Meeting Lancaster April 22, 2009


Download ppt "Muon Collider R&D in the US. Muon Collider Program  Closely coupled with R&D on the Neutrino Factory u IDS-NF  The R&D program is now encompassed in."

Similar presentations


Ads by Google