Title: Plasma Based Accelerators for Ultra High Energy Colliders
Abstract: Recent experiments at SLAC demonstrated beam-driven plasma acceleration with accelerating gradients in excess of 150 GeV/m. That’s nearly 10,000 times the accelerating gradient produced by RF cavities in the SLAC linac. Wakefield accelerators are a promising technology for future high energy colliders and were identified by the P5 Panel as a path toward 10 TeV collisions. The US 10 TeV Wakefield Collider Design Study is currently being formed in response to P5’s recommendation. In this talk, I’ll discuss challenges and R&D opportunities for a 10 TeV Wakefield Collider, and highlight opportunities for engagement with HEP theorists and experimentalists. I will also explain how the 10 TeV Wakefield Collider Design Study fits into the broader future collider strategy, and how research towards a 10 TeV Wakefield Collider benefits near-term Higgs Factories.
 

Title: Four-Dimensional Emittance Measurements and Phase Space Reconstruction Using the ASU DC Cryogun and Beamline 20m 
Speaker: Peter Owusu (ASU) 
 

Title: A Corrugated Waveguide-Based Collinear Wakefield Accelerator for a Hard X-ray Free Electron Laser

Abstract: The recent development of a corrugated waveguide-based collinear wakefield accelerator at the ANL marks a significant advancement toward realizing a facility with multiple high repetition rate hard X-ray Free-Electron Lasers. This achievement includes an improved understanding of the factors limiting accelerator performance and the successful design, fabrication, and testing of key accelerator components:

1. A 2-mm diameter corrugated waveguide embedded inside a strong-back structure for holding and cooling the waveguide.
2. Sub-terahertz frequency electromagnetic couplers for extracting the unused wakefield and diagnosing the onset of beam breakup instability (BBU).
3. A quadrupole “wiggler” composed of alternating polarity strong quadrupoles for beam focusing and suppression of BBU.
4. A compact, small-gap force neutral adjustable phase undulator (FNAPU) for enhanced FEL performance.

The corrugated waveguides and couplers underwent rigorous testing with the electron beam at the Brookhaven National Laboratory's Accelerator Test Facility. Prototypes of the quadrupole "wiggler" and FNAPU were characterized in the magnetic field measurement laboratory at APS. These comprehensive tests revealed a remarkable agreement between actual performance and anticipated design parameters, underscoring the robustness of collinear wakefield accelerator technology for future applications in the XFEL facility.