Author/Authors :
Yu، نويسنده , , L.-H and Babzien، نويسنده , , M and Ben-Zvi، نويسنده , , I and DiMauro، نويسنده , , L.F and Doyuran، نويسنده , , A and Graves، نويسنده , , W and Johnson، نويسنده , , E and Krinsky، نويسنده , , S and Malone، نويسنده , , R and Pogorelsky، نويسنده , , I and Skaritka، نويسنده , , J and Rakowsky، نويسنده , , G and Solomon، نويسنده , , L and Wang، نويسنده , , X.J and Woodle، نويسنده , , M and Yakimenko، نويسنده , , V and Biedron، نويسنده , , S.G، نويسنده ,
Abstract :
We report on the first lasing of a high-gain harmonic generation (HGHG) free-electron laser (FEL). The experiment was conducted at the Accelerator Test Facility (ATF) at Brookhaven National Laboratory (BNL). This is a BNL experiment in collaboration with the Advanced Photon Source (APS) at Argonne National Laboratory. A preliminary measurement gives a high-gain harmonic generation (HGHG) pulse energy that is 2×107 times larger than the spontaneous radiation. In a purely self-amplified spontaneous emission (SASE) mode of operation, the signal was measured as 10 times larger than the spontaneous radiation in the same distance (∼2 m) through the same wiggler. This means the HGHG signal is 2×106 times larger than the SASE signal. To obtain the same saturated output power by the SASE process, the radiator would have to be 3 times longer (6 m).
