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Title First Operation of an FEL in Same-cell Energy Recovery Mode
Authors George Neil,Stephen Benson,George Biallas,Courtlandt Bohn,David Douglas,H. Dylla,Richard Evans,Jock Fugitt,Joseph Gubeli,Richard Hill,Kevin Jordan,Geoffrey Krafft,Rui Li,Nikolitsa Merminga,Dick Oepts,Philippe PIOT,Joseph Preble,Michelle Shinn,Timothy Siggins,Richard Walker,Byung Yunn
JLAB number JLAB-ACT-99-06
LANL number (None)
Other number DOE/ER/40150-1428
Document Type(s) (Journal Article) 
Supported by U.S. Naval Research: No
Supported by Jefferson Lab LDRD Funding: No

Compiled for Nuclear Instruments & Methods in Physics Research, Section A
Volume 445
Issue 1-3
Page(s) 192-196
Publication Abstract: The driver for Jefferson Lab's kW-level infrared free-electron laser (FEL) is a superconducting, recirculating accelerator that recovers 75% of the electron-beam power and converts it to radio frequency power. As reported in FEL'98, the accelerator operated ''straight-ahead'' to deliver 38 MeV, 1.1 mA cw current for lasing at wavelengths in the vicinity of 5 microns. The waste beam was sent directly to a dump, bypassing the recirculation loop. Stable operation at up to 311 W cw was achieved in this mode. The machine has now recirculated cw average current up to 4.6 mA and has lased cw with energy recovery up to 1,720 W output at 3.1 microns. This is the first FEL to ever operate in the ''same-cell'' energy recovery mode. Energy recovery offers several advantages (reduced RF power and dramatically reduced radio-nuclide production at the dump) and several challenges will be described. The authors have observed heating effects in the mirrors which will be described. They will also report
Experiment Numbers:
Group: FEL/Light Sources Core
Document: pdf
Accepted Manuscript:
Supporting Documents:
Supporting Datasets: