FEL2022

Session

FEL Oscillators and IRFELs

TUC

23 Aug 2022, 14:10

Auditorium Generali (Trieste Convention Centre)

Conveners

FEL Oscillators and IRFELs

• Ying Wu (Duke University)

72. Observation of Burnham-Chiao Ringing with Pi-Phase Jumps in a High-Efficiency Superradiance FEL Oscillator (TUCI1)

Heishun Zen (Kyoto University), Hideaki Ohgaki (Kyoto University), Ryoichi Hajima (National Institutes for Quantum Science and Technology)

23/08/2022, 14:10

FEL oscillators & IR-FEL

Invited Orals

At the mid-infrared free electron laser oscillator in Kyoto University (KU-FEL), high extraction efficiency (9.4%) operation has been achieved [1] by introducing the dynamic cavity desynchronization technique [2] and photocathode operation of a thermionic RF gun [1]. Because of the interaction between the electron beam and FEL electromagnetic field, a maximum electron energy decrease of 16%...

33. FEL Lasing Below 170 nm Using an Oscillator (TUCI2)

Prof. Ying Wu (Duke University)

23/08/2022, 14:40

FEL oscillators & IR-FEL

Invited Orals

While the linac based single-pass FEL has been successfully operated
in the EUV and x-ray regions for about two decades, the oscillator
FEL has been limited to operating in the longer wavelength region
due to the limitation of high-reflectivity, thermally stable, and
radiation-resistant short-wavelength mirrors. With Duke storage ring FEL,
we have recently extended the shortest lasing...

85. FEL Resonance of Circular Waveguide Modes (TUCO3)

Andrew Fisher (University of California, Los Angeles), Pietro Musumeci (University of California, Los Angeles)

23/08/2022, 15:10

FEL oscillators & IR-FEL

Contributed Oral

The THz gap is a region of the electromagnetic spectrum where high average and peak power radiation sources are scarce while scientific and industrial applications grow in demand. Free-electron laser coupling in a magnetic undulator can provide radiation generation in this frequency range, but slippage effects require the use of relatively long and low current electron bunches in the THz FEL,...

94. Synchronized Terahertz Radiation and Soft X-rays Produced in a FEL Oscillator (TUCO4)

Marcel Ruijter (Istituto Nazionale di Fisica Nucleare), Vittoria Petrillo (Università Statale degli Studi di Milano and Istituto Nazionale di Fisica Nucleare), Alberto Bacci (Istituto Nazionale di Fisica Nucleare), Illya Drebot (Istituto Nazionale di Fisica Nucleare), Marcello Rossetti Conti (Istituto Nazionale di Fisica Nucleare), Andrea Rossi (Istituto Nazionale di Fisica Nucleare), Luca Serafini (Istituto Nazionale di Fisica Nucleare), Sanae Samsam (Istituto Nazionale di Fisica Nucleare and University La Sapienza of Rome), Dr Michele Opromolla (Università Statale degli Studi di Milano and Istituto Nazionale di Fisica Nucleare)

23/08/2022, 15:35

FEL oscillators & IR-FEL

Contributed Oral

We present a scheme to generate synchronized THz and Soft X-ray radiation pulses by using a Free-Electron Laser Oscillator driven by a high repetition rate energy recovery linac. The backward THz radiation in the oscillator cavity produces naturally synchronized Soft/Hard X rays via Thomson back-scattering by interacting with a successive electron bunch. The performances of this dual source...