Multidimensional simulation studies of the SELENE FEL oscillator/buncher followed by a radiator/amplifier output scheme

Conference · Wed Feb 01 04:00:00 EST 1995

OSTI ID:78706

Hahn, S J ^[1]; Fawley, W M ^[2]

---

1. Stanford Linear Accelerator Center, Menlo Park, CA (United States)
2. Lawrence Berkeley Lab., CA (United States)

We analyze and present numerical simulations of the so-called electron output scheme [G. I. Erg et al., 15th Int. FEL Conf., The Hague, The Netherlands, 1993, Book of Abstracts p. 50; Preprint Budker INP 93-75] applied to the SELENE proposal of using a high power FEL to illuminate satellite solar cells. In this scheme, a first stage FEL oscillator bunches the electron beam while a second stage ``radiator`` extracts high power radiation. Our analysis suggests only in the case where the radiator employs a long, tapered undulator will the electron output scheme produce a significant increase in extraction efficiency over what is obtainable from a simple, single-stage oscillator. 1- and 2-D numerical simulations of a 1.7{mu}m FEL employing the electron output scheme show reasonably large bunching fractions ({approximately} 0.3--0.4) at the output of the oscillator stage but only {le}2% extraction efficiency from the radiator stage.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 78706
• Report Number(s): LBL--36749; CONF-950226--49; ON: DE95012386
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BEAM BUNCHERS
BEAM EXTRACTION
COMPUTERIZED SIMULATION
ELECTRON BEAMS
FREE ELECTRON LASERS
LASER POWER TRANSMISSION
OSCILLATORS
SATELLITES
SOLAR CELLS
SPACECRAFT POWER SUPPLIES