Introduction

Pietro Musumeci (UCLA): Introductory remarks

Applications

J. Hastings (SLAC): Applications of TW-class ultrashort X-ray pulses in scientific research
P. Naulleau (LBNL): Applications of high efficiency FELs for EUV lithography
C. Pellegrini (SLAC): Researching the Schwinger fields with TW XFELs
C. Phipps (Photonic Associates): Power beaming with high efficiency FELs

Physics of High Efficiency FEL

W. Fawley (Elettra-SLAC): Review of tapering physics
P. Anisimov (LANL): High-efficiency free electron lasers with pinched electron beams
C. Emma (SLAC): Optimization of TW XFEL
H. Deng (SINAP): High brightness FEL amplifer using chirped beam and XFELO seeding
C. Feng (SINAP): Eliminating the microbunching-instability-induced sideband in a soft X-ray self-seeding FEL
S. Serkez (European XFEL): Approaches to obtain TW-class pulses at XFEL
K.J. Kim (ANL): High efficiency FEL oscillators
S. Kuzikov (Euclid): Tapered flying RF undulator
P. Musumeci (UCLA): TESSO
A. Murokh (RBT): Optical energy recovery Linac ICS Gamma-ray source

Undulator Technology

Y. Park (UCLA): Permanent magnet based strong focusing undulator design for TESSA=266
F. O'Shea (RBT): Superconducting undulator for TW XFEL
M. Calvi (PSI): Intra undulator module linear taper with tilted TGU modules
H-D. Nuhn (SLAC): Variable gap tapering for LCLS2 undulators

Numerical Methods

S. Webb (Radiasoft): Period-averaged maps for modeling tapered undulators
J. Wu (SLAC): Results from machine learning tapering at LCLS
S. Reiche (PSI): Computational methods for high efficiency FELs

Experimental Opportunities

D. Cocco (SLAC): Wavefront preserving optics development for high power FELs
N. Sudar (UCLA): Maximizing capture in ponderomotive potential: double buncher results
M. Guetg (Stanford): Generation of high-power, high-intensity, short, X-ray free-electron-laser pulses
J. Duris (SLAC): Effects of sinuisoidal tapering on FEL efficiency
G. Wang (Dalian): Generation of two-color VUV free electron laser at Dalian Coherent Light Source

Beam Dynamics

T. Limberg (DESY): Optimization of SRF linac for high efficiency XFEL
J. Rosenzweig (UCLA): Ultrahigh brightness in normal=conducting RF linacs