Author: Meyer auf der Heide, A.
Paper Title Page
THP2WB04 Laser Seeding of Electron Bunches for Future Ring-Based Light Sources 177
 
  • S. Khan, B. Büsing, N.M. Lockmann, C. Mai, A. Meyer auf der Heide, B. Riemann, B. Sawadski, M. Schmutzler, P. Ungelenk
    DELTA, Dortmund, Germany
  
  Funding: Funded by BMBF (05K16PEA, 05K16PEB), MERCUR (Pr-2014-0047), DFG (INST 212/236-1 FUGG) and the Land NRW.
In con­trast to free-elec­tron lasers (FELs), ring-based light sources are lim­ited in in­ten­sity by in­co­her­ent emis­sion and in pulse du­ra­tion by the bunch length. How­ever, FEL seed­ing schemes can be adopted to gen­er­ate in­tense and ul­tra­short ra­di­a­tion pulses in stor­age rings by cre­at­ing laser-in­duced mi­crobunches within a short slice of the elec­tron bunch. Mi­crobunch­ing gives rise to co­her­ent emis­sion at har­mon­ics of the seed wave­length. In ad­di­tion, ter­a­hertz (THz) ra­di­a­tion is co­her­ently emit­ted over many turns. At DELTA, a stor­age ring op­er­ated by the TU Dort­mund Uni­ver­sity, co­her­ent har­monic gen­er­a­tion (CHG) with sin­gle and dou­ble 40-fs pulses is rou­tinely per­formed at seed wave­lengths of 800 and 400 nm. Seed­ing with in­ten­sity-mod­u­lated pulses to gen­er­ate tun­able nar­row­band THz ra­di­a­tion is also stud­ied. As a prepa­ra­tion for echo-en­abled har­monic gen­er­a­tion (EEHG), si­mul­ta­ne­ous seed­ing with 800/400-nm pulses in two un­du­la­tors has been demon­strated. The DELTA stor­age ring is an ex­cel­lent test­bed to study many as­pects of laser seed­ing and re­lated di­ag­nos­tics. In ad­di­tion to short-pulse gen­er­a­tion, steady-state mi­crobunch­ing at ring-based light sources will be dis­cussed in the paper. 		 
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FLS2018-THP2WB04  
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