THE FREE-ELECTRON LASER AS A LABORATORY INSTRUMENT

[[abstract]]A free-electron laser (FEL) with a component cost, including the accelerator, of approximately $300k, has lased at a wavelength of 85 mu m with approximate to 12 ps micropulse duration, achieving a power growth four orders of magnitude greater than the coherent spontaneous emission, and with a small-signal, single-pass gain of 21%, The price is about an order of magnitude less than other FELs for the far infrared, and transforms the device from the role of a national facility to that of a laboratory instrument, Cost reduction was achieved by employing several novel features: a microwave cavity gun for the accelerator, a staggered-array wiggler, and an on-axis hole in the upstream cavity mirror for electron ingress and radiation egress.[[fileno]]2030114010009[[department]]電機工程學