Publications [#167638] of Ying Wu

Papers Published
  1. Stepan. F. Mikhailov, Jngyi Li, Victor Popov, Patrick W. Wallace, Ping Wang, Ying K. Wu, Oleg Anchugov, Multibunch injection scheme for the Duke booster synchrotron for top-off injection, Proceedings of 2009 Particle Accelerator Conference (2009), pp. 1238-1240 .

    A boost­er-in­jec­tor syn­chrotron has been re­cent­ly built and com­mis­sioned at Duke Uni­ver­si­ty to pro­vide for the top-off in­jec­tion into the stor­age ring in the en­er­gy range of 0.24 - 1.2 GeV. Boost­er in­jec­tion kick­er was de­signed with a pulse length of 18 out of 19 boost­er sep­a­ra­trix­es, as­sum­ing a long train of elec­tron bunch­es to be in­ject­ed from the ex­ist­ing linac. Such scheme re­quired a major linac up­grade from sin­gle bunch photo emis­sion mode to a multi­bunch thermion­ic mode. A major dis­ad­van­tage of the lat­ter was much high­er ra­di­a­tion lev­els in the fa­cil­i­ty. Since com­mis­sion­ing, the boost­er could only op­er­ate with one or two bunch­es lim­it­ed by both long kick­er pulse and sin­gle bunch in­jec­tion from the linac. The con­se­quent lim­i­ta­tion of the in­jec­tion rate re­strict­ed the ca­pa­bil­i­ty of pro­duc­tion of the Comp­ton gamma rays in the loss mode, i.e. pro­duc­tion of gam­mas with en­er­gy above 20-25 MeV, to about 5*108 pho­tons per sec. Up­date of the linac for the rep­e­ti­tion rate of up to 10 Hz, and mod­i­fi­ca­tion of the in­jec­tion kick­er for 15 nS pulse length al­lowed us to de­vel­oped an al­ter­na­tive multi­bunch in­jec­tion scheme with a sig­nif­i­cant in­crease of the in­jec­tion rate into stor­age ring.