Summary WG3
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Transcript of Summary WG3
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Summary WG3
April 21, 2023
Summary, WG3, NuFact 11, Geneva
NuFact’11
Elena Wildner, Makoto Yoshida and Alex BogaczElena Wildner, Alex Bogacz and Makoto Yoshida
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2011-08-012 NuFact'11, E. Wildner, A. Bogacz, M. Yoshida
NuFact’10 NuFact’11
2
1) Is Project X a suitable proton driver for the Neutrino Factory?Yes it is; A complete scheme emerged including stripping injection 2) What is the path for solving the problem of operating high gradient RF is strong magnetic field?Ongoing, vigorous experimental program under way at MuCool and MTA at Fermi at LBNL (first experimental tests coming out) 3) Does energy deposition pose SC solenoid shielding problem for presently proposed proton drivers? Challenging problem, robust engineering solution being worked out. 4) Do we have a working Injection/Extraction scheme for NS-FFAG Rings?Working concept under study, specific components being modeled and optimized. 5) Is chromaticity correction sufficient to reduce the TOF problem for NS-FFAG?EMMA demonstrated device feasibility. Conceptual solution is being studied
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2011-08-013
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6) Can Scaling FFAG be used in other-then-ring configurations?Complete prototype lattices designed for new applications e.g. prototype decay ring for VLENF 7) Is there a synergetic path from the Neutrino Factory to MC?A clear path emerged and being developed within MAP. Usage of components and techniques developed for NF-IDS. 8) Target handling for Multi MW targets ?1 MW target handeling needs to be addressed 9) Proposed target systems are many, convergence?Multiple designs required; different requirements for various applications 10) Material property evolution with time (from radiation, strain & stress and temperature)?Appropriate material studies under way.
NuFact’10 NuFact’11
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2011-08-014
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11) Will the Beta Beam be possible in the CERN Complex?Yes, the baseline beta beam is possible to implement
12) Verification of the 18Ne production for beta beams?Tested experimentally. 13) Modeling of pion production complete?Agreement between two models/codes (MARS and FLUKA) consistent within 10-20% with the HARP data 14) How serious is power deposition in the structures after/around the target (horn, solenoids…)? Quite significant. They are modelled accurately; adequate shielding provided
15) Feasibility of mini-neutrino factory (low energy/intensity storage ring for short baseline measurement of cross-sections)VLENF conceptual design with large acceptance decay ring, Scaling FFAG option
NuFact’10 NuFact’11
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2011-08-015 NuFact'11, E. Wildner, A. Bogacz, M. Yoshida
EUROnu
5
Objective:Compare
SuperBeamBeta BeamNeutrino Factory
Performance/CostCERN Stategy Group will get ResultTake Decision?
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2011-08-016 NuFact'11, E. Wildner, A. Bogacz, M. Yoshida
Nufact (workshop)
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Objective:Work on and discuss
Neutrino physics &
Facilities
This year: Panel Discussion with “management”
Result: we got back a number of questions from panel…Answers from Acc. Phys., see later
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2011-08-017 NuFact'11, E. Wildner, A. Bogacz, M. Yoshida
Super Beam
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2011-08-018 NuFact'11, E. Wildner, A. Bogacz, M. Yoshida
Super Beam
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2011-08-019 NuFact'11, E. Wildner, A. Bogacz, M. Yoshida
Super Beam
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2011-08-0110 NuFact'11, E. Wildner, A. Bogacz, M. Yoshida
Beta Beam
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EUROnu physics
T2K & Minos :Theta13 large!!!
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Neutrino Factory
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Studied in EUROnu (Europe) and IDS (International)
IDS Report is out
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Proton driver:• Challenges:
– High power; short proton-bunch lengthat ~10 GeV
• IDS-NF approach:– Consider two
‘generic’ options:• LINAC:
– Possible development option for SPL (CERN) or Project-X (FNAL)
– Requires accumulator &compressor rings
• Rings:– Development option for J-PARC or RAL or possible ‘green-field’ option– Requires bunch compression
IPAC10: THPD074,MOPEC049,
WEPE098
Garoby, Gollwitzer, Thomason
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Neutrino Factory Front End
23 bunches
0m
Drift - 80m
Bunch-110m
Rotate-155m
Cool-240m
700 MeV/c
0 MeV/c-30m 30m
v
Drift from target ~80m Beam lengthens
Buncher (~33m) N=10 P0=233MeV/c, PN=154MeV/c
330 → 235 MHz V’= 0→9 MV/m
Rotator (~42m) N=10.05 –
• accelerate/decelerate bunches 235 → 202 MHz,V’= 12 MV/m
Cooler (~80m) 201.25 MHz, ASOL lattice 15MV/m in rf cavities LiH or H2 cooling
Captures both μ+ and μ-
ii 0
1 1(ct ) L
0
0
1 1Nrf
N
ct L(L)
N N
Δ=10λrf
Δ=10.05λrf
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The Proposed Lay-out
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Rende Steerenberg, CERN Switzerland 17
• Re-use the old TT7 tunnel and cavern to house primary beam line and target station
• Proton beam to be provide by CERN PS 150t liquid argon TPC near detector in or near building 181 600t liquid argon TPC far detector in building 191
Near detector
Far detector
ACCE
LERA
TORS
FO
R TH
E PS
NEU
TRIN
O B
EAM
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Experimental Requirements• Request: 2.5x1020 protons over 2 years
– Based on neutrino production yield of 1980’s• Proton beam momentum ~ 20 GeV/c
– Secondary νμ and νμ beam with Eν ≤ 2 GeV
• The challenge lies in:– producing this extra amount of protons from the
CERN PS– designing the optimum and reliable target and
focussing system– Respect radiation limits for this surface facility
NuFact'11 Workshop, 1 August 2011
Rende Steerenberg, CERN Switzerland 18
ACCE
LERA
TORS
FO
R TH
E PS
NEU
TRIN
O B
EAM
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NuFact'11 Workshop, 1 August 2011
Rende Steerenberg, CERN Switzerland 19
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NuFact'11 Workshop, 1 August 2011
Rende Steerenberg, CERN Switzerland 20
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8) Target handling for Multi MW targets ?Multi MW targets feasible; two robust designs exist (NF, LBNE)Example for Frejus Superbeam:
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8) Target handling for Multi MW targets ?Multi MW targets feasible; two robust designs exist (NF, LBNE)
C. Densham
Question will remain till Nufact 12
ss
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9) Proposed target systems are many, convergence?Yes, but multiple designs required; different requirements for various applications
Target options for NF:Hg -jet target is the baseline but energy deposition in the magnet is too-high, magnet shielding need to be improved (under re-design).
Metal-powder target and solid W bars (that can be exchanged between beam pulses) are studied as mitigation options in case the Hg-jet option energy deposition issue turn to be to difficult to solve.
Aim of the feasibility study is to push the Hg-jet option to a realistic design and define if the options under study are a realistic replacement option of the Hg-jet.
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9) Proposed target systems are many, convergence?Multiple designs required; different requirements for various applications
Superbeam to Frejus
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10) Material property evolution with time (from radiation, strain & stress and temperature)?Appropriate material studies under way.
C. Densham
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3) Does energy deposition pose SC solenoid shielding problem for presently proposed proton drivers? Challenging problem, robust engineering solution being worked out.
Degradation of superconductor, insulator, thermal conductor, structure etc by irradiation some hints from COMET, ITER
Increase inner shielding 3GJ stored energyFeasibility ?
Low-Z less neutrons
Alternate target option with Low-Z?C, Densham
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13) Modeling of pion production complete?
Agreement between two models/codes (MARS and FLUKA) consistent within 10-20% with the HARP data
Recent updates from NA61 (talks in WG2).
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14) How serious is power deposition in the structures after/around the target (horn, solenoids…)? Quite significant. They are modelled accurately; adequate shielding provided
molassemolasse
concreteconcrete
ACTIVITY density in Bq/cmACTIVITY density in Bq/cm33 packed Ti target, 65%dTi
4MW beam, 4horns, 200days of irradiation
4MW Superbeam Horns
4MW NF SolenoidsStill >1MGy/year at downstream
need investigation on downstream materials
K. McDonald
N. Vassilopoulos
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11) Will the Beta Beam be possible in the CERN Complex? Yes, the baseline beta beam is possible to implement
Existing machines: PS E. Benedetto
Existing machines: SPS still needs studies, Less constrained SF helps
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11) Will the Beta Beam be possible in the CERN Complex?Yes, the baseline beta beam is possible to implement
Decay Ring optimization good with higher SF, solutions exist for small theta13
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11) Will the Beta Beam be possible in the CERN Complex?Yes, the baseline beta beam is possible to implement
Efficiencies and beam parameters on the way
T. Lamy
ECR Source
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11) Will the Beta Beam be possible in the CERN Complex?Yes, the baseline beta beam is possible to implement
Solutions for theta 13 smaller exsist
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11) Will the Beta Beam be possible in the CERN Complex?Yes, the baseline beta beam is possible to implement
Ion Production
6He ok, operation feasable 18 Ne under test
T. Stora
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12) Verification of the 18Ne production for beta beams?Tested experimentally
18Ne Production was a serious show stopper
18 Ne under test
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1) Is Project X a suitable proton driver for the Neutrino Factory?Yes it is; A complete scheme emerged including stripping injection
R. Garoby
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1) Is Project X a suitable proton driver for the Neutrino Factory?Yes it is; A complete scheme emerged including stripping injection
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2) What is the path for solving the problem of operating high gradient RF is strong magnetic field?Ongoing, vigorous experimental program under way at MuCool and MTA at Fermi (first experimental tests coming out)
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4) Do we have a working Injection/Extraction scheme for NS-FFAG Rings?Working concept under study, specific component being modeled and optimized.
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4) Do we have a working Injection/Extraction scheme for NS-FFAG Rings?Working concept under study, specific component being modeled and optimized.
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5) Is chromaticity correction sufficient to reduce the TOF problem for NS-FFAG?EMMA demonstrated device feasibility. Conceptual solution is being studied
Shinji Machida
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Shinji Machida
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5) Is chromaticity correction sufficient to reduce the TOF problem for NS-FFAG?EMMA demonstrated device feasibility. Conceptual solution is being studied
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6) Can Scaling FFAG be used in other-then-ring configurations?Complete prototype lattices designed for new applications e.g. prototype decay ring for VLENF
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15) Feasibility of mini-neutrino factory (low energy/intensity storage ring for short baseline measurement of cross-sections)VLENF conceptual design with large acceptance decay ring, Scaling FFAG option
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15) Feasibility of mini-neutrino factory (low energy/intensity storage ring for short baseline measurement of cross-sections)VLENF conceptual design with large acceptance decay ring, Scaling FFAG option
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7) Is there a synergetic path from the Neutrino Factory to MC?A clear path emerged and being developed within MAP. Usage of components and techniques developed for NF-IDS.
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1) What combination of proton beam energy and bunch length is the best compromise for integrated muon beam intensity?
2) Important to update the acceleration system of the beta beams from the source to the decay Ring
3) The PS (space charge, instabilities)
4) The SPS (instabilities and RF)
5) Impact of possible high 13 on the neutrino facilities, design parameters
6) Operating high gradient normal conducting RF rf cavities in strong magnetic field; gradient degradation, effects of intense ionizing radiation traversing gas?Ongoing, vigorous experimental program under way at LBNL and MTA at Fermi (first experimental tests coming out)
NufacF’11 NuFact’12 (new)
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Yoshida51
7) Does energy deposition pose SC solenoid shielding problem for presently proposed proton drivers?Challenging problem, robust engineering solution being worked out.
8) Do we have a working Injection/Extraction scheme for NS-FFAG Rings?Working concept under study, specific component being modeled and optimized. 9) Is chromaticity correction sufficient to reduce the TOF problem for NS-FFAG?EMMA demonstrated device feasibility. Conceptual solution is being studied
10) Target handling for Multi MW targets ?1 MW target handeling needs to be addressed
11) Material property evolution with time (from radiation, strain & stress and temperature)?Appropriate material studies under way.
NuFact’11 NuFact’12
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12) Modeling of pion production complete?Agreement between two models/codes (MARS and FLUKA) consistent within 10-20% with the HARP data
13) How serious is power deposition in the structures after/around the target (horn, solenoids…)? Quite significant. They are modelled accurately; adequate shielding provided
14) Feasibility of mini-neutrino factory (low energy/intensity storage ring for short baseline measurement of cross-sections)VLENF conceptual design with large acceptance decay ring, Scaling FFAG option
NuFact’11 NuFact’12