Conveners: Stephen Gourlay, Tor Raubenheimer, Vladimir Shiltsev

Frontier Summary Report arXiv:2209.14136

Topical Group Reports:

        Beam Physics and Accelerator Education arXiv:2209.07668
                Conveners: Mei Bai, Zhirong Huang. Steven M. Lund
        Accelerators for Electroweak and Higgs arXiv:2209.05827
                Conveners: Angeles Faus-Golfe, Georg H. Hoffstaetter,
                      Qing Qin, Frank Zimmermann
        Accelerators for Rare Processes and Physics Beyond Colliders arXiv:2209.06289
                Conveners: Mike Lamont, Richard Milner, Eric Prebys
        Advanced Accelerator Concepts arXiv:2208.13279
                Conveners: Ralph Assmann, Cameron Geddes, Mark Hogan,
                      Pietro Musumeci
        Accelerator Technology - RF arXiv:2208.12368
                Conveners: Sergey Belomestnykh, Emilio A. Nanni, Hans Weise
        Accelerator Technology - Magnets arXiv:2208.13349
                Conveners: Susana Izquierdo Bermudez, Gianluca Sabbi,
                      Alexander V. Zlobin
        Accelerator Technology - Targets and Sources arXiv:2208.13641
                Conveners: Charlotte Barbier, Frederique Pellemoine, Yin-E Sun

Cross-Frontier Reports:

T. Roser et al. Report of the Snowmass 2021 Collider Implementation Task Force arXiv:2208.06030
K. M. Black et al. Report of the Snowmass 2021 Muon Collider Forum arXiv:2209.01318
M. Chamizo Llatas et al. Report of the Snowmass 2021 Electron-Positron Collider Forum arXiv:2209.03472

Contributed Papers:

General - centered on this frontier

V. Shiltsev, F. Zimmermann Modern and Future Colliders arXiv:2003.09084
J. Arrington et al. Physics Opportunities for the Fermilab Booster Replacement arXiv:2203.03925
J. L. Feng et al. The Forward Physics Facility at the High-Luminosity LHC arXiv:2203.05090
J. A. Bagger et al. Higgs Factory Considerations arXiv:2203.06164
G. Bernardi et al. The Future Circular Collider: a Summary for the US 2021 Snowmass Process arXiv:2203.06520
P. J. Fox et al. DIMUS: Super-Compact Dimuonium Spectroscopy Collider at Fermilab arXiv:2203.07144
P. C. Bhat et al. Future Collider Options for the US arXiv:2203.08088
A. Bogacz et al. The Physics Case for a Neutrino Factory arXiv:2203.08094
S. Biedron et al. Accelerator Modeling Community White Paper arXiv:2203.08335
O. Brunner et al. The CLIC Project arXiv:2203.09186
A. M. M. Todd Nurturing the Industrial Accelerator Technology Base in the US arXiv:2203.10377
J. Power et al. Beam Test Facilities for R&D in Accelerator Science and Technologies arXiv:2203.11290
R. Abdul Khalek Electron Ion Collider for High Energy Physics arXiv:2203.13199
M. Endo et al. Japan’s Strategy for Future Projects in High Energy Physics arXiv:2203.13979
Z. Liu, L.-T. Wang. Physics at Future Colliders: the Interplay Between Energy and Luminosity arXiv:2205.00031
H. Cheng et al. The Physics potential of the CEPC arXiv:2205.08553
P. C. Bhat et al. U.S. National Accelerator R&D Program on Future Colliders arXiv:2207.06213

General - cross-listed

E. Adelberger et al. Precision Studies of Spacetime Symmetries and Gravitational Physics arXiv:2203.09691
B. Madison, G. W. Wilson. Center-of-Mass Energy Determination using e+e−→μ+μ-(γ) Events at Future e+e− Colliders arXiv:2209.03281

Beam Physics and Accelerator Education

A. Scheinker, S. Gessner. Adaptive Machine Learning for Time-Varying Systems: Towards 6D Phase Space Diagnostics of Short Intense Charged Particle Beams arXiv:2203.04391
S. Brooks et al. Ion Coulomb Crystals in Storage Rings for Quantum Information Science arXiv:2203.06809
S. Nagaitsev et al. Accelerator and Beam Physics: Grand Challenges and Research Opportunities arXiv:2203.06816
M. Bai et al. Strategies in Education, Outreach, and Inclusion to Enhance the US Workforce in Accelerator Science and Engineering arXiv:2203.08919
E. Arce-Lareta et al. The Necessity of International Particle Physics Opportunities for American Education arXiv:2203.09336
E. Barzi et al. In Search of Excellence and Equity in Physics arXiv:2203.10393
E. Barzi et al. How Community Agreements Can Improve Workplace Culture in Physics arXiv:2209.06755

Accelerators for Neutrinos

R. Ainsworth et al. An Upgrade Path for the Fermilab Accelerator Complex arXiv:2106.02133
S. Nagaitsev et al. A Cost-Efective Upgrade Path for the Fermilab Accelerator Complex arXiv:2111.06932
T. Akindele et al. A Call to Arms Control: Synergies between Nonproliferation Applications of Neutrino Detectors and Large-Scale Fundamental Neutrino Physics Experiments arXiv:2203.00042
S. Belomestnykh et al. An 8 GeV Linac as the Booster Replacement in the Fermilab Power Upgrade arXiv:2203.05052
D. Winklehner et al. Report of the Snowmass'21 Workshop on High-Power Cyclotrons and FFAs arXiv:2203.07919
J. Eldred et al. Design Considerations for Fermilab Multi-MW Proton Facility in the DUNE/LBNF Era arXiv:2203.08276
A. Longhin et al. (ENUBET Collaboration) Enhanced NeUtrino BEams from kaon Tagging (ENUBET) arXiv:2203.08319
A. Rakhman. Laser Manipulation of H- Beams arXiv:2203.08427
A. Alekou et al. The European Spallation Source Neutrino Super Beam arXiv:2203.08803
J. R. Alonso et al. IsoDAR Overview arXiv:2203.08804
H. Bartosik, G. Rumolo. Performance of the LHC Injector Chain after the Upgrade and Potential Development arXiv:2203.09202
M. Perrin-Terrin. Tagged Neutrino Beams HAL-03634918

Accelerators for Electroweak and Higgs

A. Blondel et al. FCC-ee: Your Questions Answered arXiv:1906.02693
M. Bai et al. C3: A 'Cool' Route to the Higgs Boson and Beyond arXiv:2110.15800
V. N. Litvinenko et al. The ReLiC: Recycling Linear e+e− Collider arXiv:2203.06476
V. N. Litvinenko et al. CERC - Circular e+e- Collider using Energy-Recovery Linac arXiv:2203.07358
A. Aryshev et al. The International Linear Collider arXiv:2203.07622
S. Dasu et al. Strategy for Understanding the Higgs Physics: The Cool Copper Collider arXiv:2203.07646
S. Belomestnykh et al. Higgs-Energy LEptoN (HELEN) Collider Based on Advanced Superconducting Radio Frequency Technology arXiv:2203.08211
I. Agapov et al. Future Circular Lepton Collider FCC-ee: Overview and Status arXiv:2203.08310
E. Barzi et al. High Energy & High Luminosity γγ Colliders arXiv:2203.08353
T. Barklow et al. XCC: An X-ray FEL-Based γγ Collider Higgs Factory arXiv:2203.08484
E. A. Nanni et al. C^3 Demonstration Research and Development Plan arXiv:2203.09076
CEPC Accelerator Study Group Circular Electron Positron Collider (CEPC) arXiv:2203.09451
E. Barzi et al. An Impartial Perspective for Superconducting Nb3Sn coated Copper RF Cavities for Future Accelerators arXiv:2203.09718
P. Janot, A. Blondel. The Carbon Footprint of Proposed e+e- Higgs Factories arXiv:2208.10466

Multi-TeV Colliders

A. Costantini et al. Vector Boson Fusion at Multi-TeV Muon Colliders arXiv:2005.10289
R. Ruiz et al. The Effective Vector Boson Approximation in High-Energy Muon Collisions arXiv:2111.02442
T. Han et al. Axion-Like Particles at High Energy Muon Colliders arXiv:2203.05484
D. Acosta et al. The Potential of a TeV-Scale Muon-Ion Collider arXiv:2203.06258
J. Rogers et al. Strategies for Conformal REBCO Windings arXiv:2203.06800
T. Han et al. WIMP Dark Matter at High Energy Muon Colliders arXiv:2203.07351
M. Benedikt et al. Future Circular Hadron Collider FCC-hh: Overview and Status arXiv:2203.07804
J. Tang et al. Study Overview for Super Proton-Proton Collider arXiv:2203.07987
D. Stratakis et al. A Muon Collider Facility for Physics Discovery arXiv:2203.08033
P. M. McIntyre. Hybrid Conformal REBCO Dipole for a Next Hadron Collider arXiv:2203.08132

Accelerators for Rare Processes and Physics Beyond Colliders

A. Natochii et al. Beam background expectations for Belle II at SuperKEKB arXiv:2203.05731
W. Pellico et al. FNAL PIP-II Accumulator Ring arXiv:2203.07339
M. Toups et al. PIP2-BD: GeV Proton Beam Dump at Fermilab's PIP-II Linac arXiv:2203.08079
M. Toups et al. SBN-BD: O(10 GeV) Proton Beam Dump at Fermilab's PIP-II Linac arXiv:2203.08102
J. Jaeckel et al. Axion Dark Matter arXiv:2203.14923
R.G. Van de Water et al. LANSCE-PSR Short-Pulse Upgrade for Improved Dark Sector Particle Searches with the Coherent Captain Mills Experiment arXiv:2204.01860
S. Banerjee et al. Upgrading SuperKEKB with a Polarized Electron Beam: Discovery Potential and Proposed Implementation arXiv:2205.12847
T. Markiewicz et al. The SLAC Linac to ESA (LESA) Beamline for Dark Sector Searches and Test Beams arXiv:2205.13215

Advanced Accelerator Concepts

R. Ariniello et al. Channeling Acceleration in Crystals and Nanostructures and Studies of Solid Plasmas: New Opportunities arXiv:2203.07459
C. Jing et al. Continuous and Coordinated Efforts of Structure Wakefield Acceleration (SWFA) Development for an Energy Frontier Machine arXiv:2203.08275
C. Benedetti et al. Linear Collider Based on Laser-Plasma Accelerators arXiv:2203.08366
M. Fuchs et al. Plasma-Based Particle Sources arXiv:2203.08379
C. Benedetti et al. Advanced Accelerator Linear Collider Demonstration Facility at Intermediate Energy arXiv:2203.08425
R. J. England et al. Laser-Driven Structure-Based Accelerators arXiv:2203.08981
C. Emma et al. Near Term Applications driven by Advanced Accelerator Concepts arXiv:2203.09094
P. Muggli (AWAKE Collaboration) AWAKE, Plasma Wakefield Acceleration of Electron Bunches for Near and Long Term Particle Physics Applications arXiv:2203.09198
A. A. Sahai et al. PetaVolts per Meter Plasmonics arXiv:2203.11623
L. Kiani et al. High Average Power Ultrafast Laser Technologies for Driving Future Advanced Accelerators arXiv:2204.10774

Accelerator Technology - RF

J. Norem et al. Understanding Vacuum Arcs and Gradient Limits arXiv:2203.01847
S. Posen et al. Nb3Sn Superconducting Radiofrequency Cavities: a Maturing Technology for Particle Accelerators and Detectors arXiv:2203.06752
G. Myneni et al. Medium-Grain Niobium SRF Cavity Production Technology for Science Frontiers and Accelerator Applications arXiv:2203.07371
T. Roser. Sustainability Considerations for Accelerator and Collider Facilities arXiv:2203.07423
T. Kroc et al. The Need for Further Development of Magnetrons as RF Sources for HEP arXiv:2203.07888
A. Gurevich et al. Challenges and Opportunities of SRF Theory for Next Generation Particle Accelerators arXiv:2203.08315
X. Lu et al. Advanced RF Structures for Wakefield Acceleration and High-Gradient Research arXiv:2203.08374
S. Boucher et al. Transformative Technology for FLASH Radiation Therapy arXiv:2203.11047
R. L. Ives et al. High Efficiency, Low Cost, RF Sources for Accelerators and Colliders arXiv:2203.12043
M. Martinello et al. Plasma Processing for In-Situ Field Emission Mitigation of Superconducting Radiofrequency (SRF) Cryomodules arXiv:2203.12442
B. Weatherford et al. Advanced RF Sources R&D for Economical Future Colliders arXiv:2203.15984
D. Filippetto et al. Feedback and Control Systems for Future Linear Colliders arXiv:2204.00701
S. Belomestnykh et al. Key Directions for Research and Development of Superconducting Radio Frequency Cavities arXiv:2204.01178
A.- M. Valente-Feliciano et al. Next-Generation Superconducting RF Technology based on Advanced Thin Film Technologies and Innovative Materials for Accelerator Enhanced Performance and Energy Reach arXiv:2204.02536

Accelerator Technology - Magnets

H. Piekarz et al. Fast Cycling HTS Based Superconducting Accelerator Magnets: Feasibility Study and Readiness Demonstration Program Driven by Neutrino Physics and Muon Collider Needs arXiv:2203.06253
S. Stoynev. Test Samples and Infrastructure for Accelerator Magnet Developments arXiv:2203.07274
G. Ambrosio et al. Development and Demonstration of Next Generation Technology for Nb_3Sn Accelerator Magnets with Lower Cost, Improved Performance Uniformity, and Higher Operating Point in the 12-14 T Range arXiv:2203.07352
G. Ambrosio et al. Leading-Edge Technology And Feasibility-Directed (LEAF) Program Aimed at Readiness Demonstration for Energy Frontier Circular Colliders by the Next Decade arXiv:2203.07654
F. Kametani et al. Fe-Based High Field Superconductors for Cost-Effective Future Accelerator Magnets arXiv:2203.07551
M. Mentink et al. Superconducting Detector Magnets for High Energy Physics arXiv:2203.07799
P. Védrine et al. High Field Magnet Development for HEP in Europe: A Proposal from LDG HFM Expert Panel arXiv:2203.08054
M. Baldini et al. Fiber-Optic Diagnostic System for Future Accelerator Magnets arXiv:2203.08309
X. Wang et al. REBCO – a Silver Bullet for our Next High-Field Magnet and Collider Budget? arXiv:2203.08736
R. Gupta et al. Common Coil Dipole for High Field Magnet Design and R&D arXiv:2203.08750
M. Marchevsky et al. Advancing Superconducting Magnet Diagnostics for Future Colliders arXiv:2203.08869
M. Marchevsky. Understanding Training in Superconducting Accelerator Magnets using Acoustic Emission Diagnostics arXiv:2203.08871
Yu. I. Alexahin et al. Solving Critical Problems of the Muon Collider Higgs Factory: Optics, Magnets and their Protection, Detector Backgrounds arXiv:2203.09010
Yu. I. Alexahin et al. Critical Problems of Energy Frontier Muon Colliders: Optics, Magnets, and Radiation arXiv:2203.10431
T. Shen et al. High Temperature Superconducting Bi-2212 Magnets for Energy Frontier Circular Colliders arXiv:2203.10564
T. Ogitsu et al. R&D Works for Superconducting Magnets for Future Accelerator Applications in Japan arXiv:2203.12118
G. Ambrosio et al. A Strategic Approach to Advance Magnet Technology for Next Generation Colliders arXiv:2203.13985
L. Bottura et al. A Work Proposal for a Collaborative Study of Magnet Technology for a Future Muon Collider arXiv:2203.13998
E. Barzi. Conductor Properties and Coil Technology for a Bi2212 Dipole Insert for 20 Tesla Hybrid Accelerator Magnets arXiv:2204.01072
L. Cooley et al. Challenges and Opportunities to Assure Future Manufacturing of Magnet Conductors for the Accelerator Sector arXiv:2208.12379

Accelerator Technology - Targets and Sources

C. Barbier et al. Modeling Needs for High Power Target arXiv:2203.04714
K. Yonehara. Radiation Hardened Beam Instrumentations for Multi-Mega-Watt Beam Facilities arXiv:2203.06024
F. Pellemoine et al. Irradiation Facilities and Irradiation Methods for High Power Target arXiv:2203.08239
K. Ammigan et al. Novel Materials and Concepts for Next-Generation High Power Target Applications arXiv:2203.08357
P. Musumeci et al. Positron Sources for Future High Energy Physics Colliders arXiv:2204.13245
A. Lapierre et al. Ion Sources for Production of Highly Charged Ion Beams arXiv:2205.12873
L. Cultrera. Spin Polarized Electron Beams Production Beyond III-V Semiconductors arXiv:2206.15345
D. Filippetto et al. Electron Sources for Accelerators arXiv:2207.08875