Publications (30)
Feedback and control systems for future linear colliders: White Paper for Snowmass 2021 Topical Group AF07-RF
Daniele Filippetto, Carlos Serrano, Qiang Du +9
Particle accelerators for high energy physics will generate TeV-scale particle beams in large, multi-Km size machines colliding high brightness beams at the interaction point [1-4]…
Report of the Snowmass 2021 ee-Collider Forum
Maria Chamizo Llatas, Sridhara Dasu, Ulrich Heintz +3
A summary of the Snowmass 2021 ee-Collider Forum discussions, white papers submitted to the Snowmass 2021 community study, submissions of the Energy Frontier (EF) subgroups…
Advanced RF Structures for Wakefield Acceleration and High-Gradient Research
Xueying Lu, Jiahang Shao, John Power +28
Structure wakefield acceleration (SWFA) is one of the most promising AAC schemes in several recent strategic reports, including DOE's 2016 AAC Roadmap, report on the Advanced and N…
Short-Pulse Driven Radiofrequency X-Band Photoinjector: Electromagnetic Properties and Beam Dynamics in the Transient Regime
Gongxiaohui Chen, Philippe Piot, John Power +1
This paper presents a study of the radiofrequency (RF) characteristics and beam dynamics of an X-band photogun (Xgun) operating in the transient state. The photoinjector is designe…
An Integrated Multi-Physics Optimization Framework for Particle Accelerator Design
Gongxiaohui Chen, Tyler H. Chang, John Power +1
The overarching goal of beamline design is to achieve a high brightness electron beam from the beamline. Traditional beamline design studies involved separate optimizations of radi…
Demonstration of Autonomous Emittance Characterization at the Argonne Wakefield Accelerator
Ryan Roussel, Auralee Edelen, Dylan Kennedy +3
Transverse beam emittance plays a key role in the performance of high brightness accelerators. Characterizing beam emittance is often done using a quadrupole scan, which fits beam…
Efficient 6-dimensional phase space reconstruction from experimental measurements using generative machine learning
Ryan Roussel, Juan Pablo Gonzalez-Aguilera, Auralee Edelen +5
Next-generation accelerator concepts which hinge on the precise shaping of beam distributions, demand equally precise diagnostic methods capable of reconstructing beam distribution…
Evaluating Effects of Geometry and Material Composition on Production of Transversely Shaped Beams from Diamond Field Emission Array Cathodes
Mitchell E. Schneider, Heather Andrews, Sergey V. Baryshev +8
Field emission cathodes (FECs) are attractive for the next generation of injectors due to their ability to provide high current density bright beams with low intrinsic emittance. O…
Continuous and Coordinated Efforts of Structure Wakefield Acceleration (SWFA) Development for an Energy Frontier Machine
Chunguang Jing, John Power, Jiahang Shao +14
Structure wakefield acceleration (SWFA) is well suited for the linear collider (LC) application due to its natural ability to accelerate positrons and preserve emittance. Under the…
Turn-Key Constrained Parameter Space Exploration for Particle Accelerators Using Bayesian Active Learning
Ryan Roussel, Juan Pablo Gonzalez-Aguilera, Young-Kee Kim +6
Particle accelerators are invaluable discovery engines in the chemical, biological and physical sciences. Characterization of the accelerated beam response to accelerator input par…
Direct Measurement of Eigenemittances Transfer to Projected Emittances via Phase-Space Decoupling for an Electron Beam
Tianzhe Xu, Scott Doran, Wanming Liu +4
Phase-space partitioning offers an attractive path for the precise tailoring of complex dynamical systems. In Beam Physics, the proposed approach involves (i) producing beams with…
Coalgebraic Logic Programming: from Semantics to Implementation
Ekaterina Komendantskaya, John Power, Martin Schmidt
Coinductive definitions, such as that of an infinite stream, may often be described by elegant logic programs, but ones for which SLD-refutation is of no value as SLD-derivations f…
Beam Delivery and Beamstrahlung Considerations for Ultra-High Energy Linear Colliders
Tim Barklow, Spencer Gessner, Mark Hogan +27
As part of the Snowmass'21 community planning excercise, the Advanced Accelerator Concepts (AAC) community proposed future linear colliders with center-of-mass energies up to 15 Te…
Logic programming: laxness and saturation
Ekaterina Komendantskaya, John Power
A propositional logic program may be identified with a -coalgebra on the set of atomic propositions in the program. The corresponding -coalgebra, where $C(P_…
C Demonstration Research and Development Plan
Emilio A. Nanni, Martin Breidenbach, Caterina Vernieri +46
C is an opportunity to realize an ee collider for the study of the Higgs boson at GeV, with a well defined upgrade path to 550 GeV while staying on the…
Transition radiation in photonic topological crystals: quasi-resonant excitation of robust edge states by a moving charge
Yang Yu, Kueifu Lai, Jiahang Shao +7
We demonstrate, theoretically and experimentally, that a traveling electric charge passing from one photonic crystal into another generates edge waves -- electromagnetic modes with…
Phase Space Reconstruction from Accelerator Beam Measurements Using Neural Networks and Differentiable Simulations
Ryan Roussel, Auralee Edelen, Christopher Mayes +5
Characterizing the phase space distribution of particle beams in accelerators is a central part of accelerator understanding and performance optimization. However, conventional rec…
Experimental demonstration of cascaded round-to-flat and flat-to-round beam transformations
Seongyeol Kim, Philippe Piot, Gonxiaohui Chen +5
Magnetized beams beam with significant canonical angular momentum are critical to electron cooling of hadron beams such as contemplated in next-generation hadron and electron-ion c…
Electron Sources for Accelerators
Daniele Filippetto, Joe Grames, Carlos Hernandez-Garcia +5
Electron sources are essential to an array of electron accelerator supporting research in high-energy physics and beyond. This report summarizes the "Snowmass 2021 Electron Source…
Benchmarking Collective Effects of Electron Interactions in a Wiggler with OPAL-FEL
Arnau AlbÃ, Jimin Seok, Andreas Adelmann +9
OPAL-FEL is a recently developed tool for the modeling of particle accelerators containing wigglers or undulators. It extends the well established 3D electrostatic particle-trackin…
Proposal for a Damping-Ring-Free Electron Injector for Future Linear Colliders
Tianzhe Xu, Masao Kuriki, Philippe Piot +1
The current designs of future electron-positron linear colliders incorporate large and complex damping rings to produce asymmetric beams for beamstrahlung suppression. Here we pres…
An enriched view on the extended finitary monad--Lawvere theory correspondence
Richard Garner, John Power
We give a new account of the correspondence, first established by Nishizawa--Power, between finitary monads and Lawvere theories over an arbitrary locally finitely presentable base…
Beam Test Facilities for R&D in Accelerator Science and Technologies
John Power, Christine Clarke, Michael Downer +14
This is the Snowmass Whitepaper on Beam Test Facilities for R&D in Accelerator Science and Technologies and it is submitted to two topical groups in the Accelerator Frontier: AF1 a…
Systematic benchmarking of planar nitrogen-incorporated ultrananocrystalline diamond field emission electron source: rf conditioning and beam spatio-temporal characteristics
Jiahang Shao, Mitchell Schneider, Gongxiaohui Chen +8
Planar nitrogen-incorporated ultrananocrystalline diamond, (N)UNCD, has emerged as a unique field emission source attractive for accelerator applications because of its capability…
Drive beam sources and longitudinal shaping techniques
Francois Lemery, Gerard Andonian, Steffen Doebert +4
Linear colliders are an attractive platform to explore high-precision physics of newly discovered particles. The recent significant progress in advanced accelerator technologies ha…
Proceedings of the First Workshop on Coalgebra, Horn Clause Logic Programming and Types
Ekaterina Komendantskaya, John Power
The Workshop on Coalgebra, Horn Clause Logic Programming and Types was held on the 28-29 November 2016 in Edinburgh. The workshop marked the end of the EPSRC Grant Coalgebraic Logi…
Observation of Skewed Electromagnetic Wakefields in an Asymmetric Structure Driven by Flat Electron Bunches
Walter Lynn, Tianzhe Xu, Gerard Andonian +8
Relativistic charged-particle beams which generate intense longitudinal fields in accelerating structures also inherently couple to transverse modes. The effects of this coupling m…
Four-Dimensional Phase-Space Reconstruction of Flat and Magnetized Beams Using Neural Networks and Differentiable Simulations
Seongyeol Kim, Juan Pablo Gonzalez-Aguilera, Philippe Piot +9
Beams with cross-plane coupling or extreme asymmetries between the two transverse phase spaces are often encountered in particle accelerators. Flat beams with large transverse-emit…
Category theoretic semantics for theorem proving in logic programming: embracing the laxness
Ekaterina Komendantskaya, John Power
A propositional logic program may be identified with a -coalgebra on the set of atomic propositions in the program. The corresponding -coalgebra, where $C(P_…
Development and high-power testing of an X-band dielectric-loaded power extractor
Jiahang Shao, Chunguang Jing, Eric Wisniewski +5
Dielectric loaded structures are promising candidates for use in the structure wakefield acceleration (SWFA) technique, for both the collinear wakefield and the two-beam accelerati…