High-power terahertz synchrotron sources

G.P. Williams, P. Weightman, A. Doria, Y. Shen, D.M. Mittleman, M. Towrie, H. Roskos

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Electromagnetic waves, or light, are produced by accelerating electrons according to the formula assigned the name of Sir Joseph Larmor, who was secretary of The Royal Society from 1901 to 1912. For relativistic electrons the emission is enhanced by the fourth power of the increase in mass. Thus for 10 MeV electrons, for which the mass increases by a factor of 21, the enhancement is a factor of 200 000. We have generated high-power broadband THz light using relativistic electrons and demonstrated that ca. 100 W can readily be produced in a band from 0.1 to 3 THz with possible extensions to 6 THz. The experiments use a new generation of light source in which bunches of electrons circulate once, but in which their energy is recovered. In such a machine the electron bunches can be very much shorter than those, say, in storage rings or synchrotrons.
Original languageEnglish
Pages (from-to)403 - 414
Number of pages12
JournalPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Issue number1815
Publication statusPublished - 15 Feb 2004
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Mathematics(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Williams, G. P., Weightman, P., Doria, A., Shen, Y., Mittleman, D. M., Towrie, M., & Roskos, H. (2004). High-power terahertz synchrotron sources. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 362(1815), 403 - 414. https://doi.org/10.1098/rsta.2003.1325