Design Studies for a VUV--Soft X-ray Free-Electron Laser Array

Journal Article · Tue Aug 04 00:00:00 EDT 2009 · Synchrotron Radiation News

DOI:https://doi.org/10.1080/08940880903256817· OSTI ID:973523

Corlett, J; Baptiste, K; Byrd, J M; Denes, P; Falcone, R; Kirz, J; McCurdy, W; Padmore, H; Penn, G; Qiang, J; Robin, D; Sannibale, F; Schoenlein, R; Staples, J; Steier, C; Venturnini, M; Wan, W; Wells, R; Wilcox, R; Zholents, A

Several recent reports have identified the scientific requirements for a future soft X-ray light source [1, 2, 3, 4, 5], and a high-repetition-rate free-electron laser (FEL) facility responsive to them is being studied at Lawrence Berkeley National Laboratory (LBNL) [6]. The facility is based on a continuous-wave (CW) superconducting linear accelerator with beam supplied by a high-brightness, high-repetition-rate photocathode electron gun operating in CW mode, and on an array of FELs to which the accelerated beam is distributed, each operating at high repetition rate and with even pulse spacing. Dependent on the experimental requirements, the individualFELs may be configured for either self-amplified spontaneous emission (SASE), seeded highgain harmonic generation (HGHG), echo-enabled harmonic generation (EEHG), or oscillator mode of operation, and will produce high peak and average brightness x-rays with a flexible pulse format ranging from sub-femtoseconds to hundreds of femtoseconds. This new light source would serve a broad community of scientists in many areas of research, similar to existing utilization of storage ring based light sources. To reduce technical risks and constructioncosts, accelerator research, development, and design studies at LBNL target the most critical components and systems of the facility. We are developing a high-repetition-rate low-emittance electron gun, high quantum efficiency photocathodes, and have embarked on design and optimization of the electron beam accelerator, FEL switchyard, and array of FELs. We continue our work on precision timing and synchronization systems critical for time-resolved experiments using pump-probe techniques.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: Accelerator& Fusion Research Division
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 973523
• Report Number(s): LBNL-2544E; TRN: US1001826
• Journal Information: Synchrotron Radiation News, Vol. 22, Issue 5
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ACCURACY
BRIGHTNESS
DESIGN
ELECTRON BEAMS
ELECTRON GUNS
FREE ELECTRON LASERS
HARMONIC GENERATION
LIGHT SOURCES
LINEAR ACCELERATORS
OPTIMIZATION
OSCILLATORS
PHOTOCATHODES
QUANTUM EFFICIENCY
STORAGE RINGS
SYNCHRONIZATION
TARGETS
X-ray FEL
Free-Electron Laser
SASE
HGHG
EEHG
VHF photogun