Publications [#17523] of Ying Wu

Papers Published

1. M.W. Ahmeda, G. Feldmana,b, V.N. Litvinenkoc, S.O. Nelsona, B.E. Norumd, B. Perduea, I.V. Pinayevc, B. Sawatzkyd, A.P. Toncheva, Y. Wu , H.R. Weller, Background reduction in FEL-generated g-ray beam experiments using giant high-peakpower pulses, Nuclear Instruments and Methods in Physics Research A no. 516 (August, 2003), pp. 440-444
   (last updated on 2004/01/01)

   Abstract:
   A new method to eliminate beam-uncorrelated background in photonuclear experiments has been developed at the High Intensity Gamma-Ray Source (HIgS). Background suppression of over 3 orders-of-magnitude has been achieved by using a gain modulation technique to generate giant high-peakpower (GHPP) pulses in the OK-4/ Duke storage ring FEL. The time structure of these laser pulses was tuned so that their duration was B100 ms; repeated every 50 ms: The associated FEL photons were backscattered from 780 MeV electrons to produce linearly polarized 40 MeV g-rays having the same time structure as the FEL pulses. As an initial test of the technique, a nearly background-free measurement of the analyzing power in the Compton scattering reaction 16Oð~g; gÞ16O was performed. r 2003 Elsevier B.V. All rights reserved.