• U.H. Lacroix, D.M. Fong, G. Travish, N. Vartanian
  UCLA, Los Angeles
• E.R. Arab
  PBPL, Los Angeles
• R.B. Yoder
  Manhattanville College, Purchase, New York

Py­ro­elec­tric crys­tals, which pro­duce large sur­face elec­tric fields dur­ing heat­ing and cool­ing, have been pro­posed as a mech­a­nism for con­struct­ing a stand-alone elec­tron beam source. We re­port on ex­per­i­men­tal tests of this con­cept, using a va­ri­ety of field emis­sion tips com­bined with a py­ro­elec­tric crys­tal to pro­duce a low-en­er­gy elec­tron beam dur­ing ther­mal cy­cling. The mech­a­nism is suit­able for gen­er­at­ing very small elec­tron bunch­es, with en­er­gies up to tens of kilo­volts, for use in mi­croac­cel­er­a­tor struc­tures.

• J.C. McNeur, R. Dusad, Z.B. Hoyer, J.B. Rosenzweig, G. Travish, N. Vartanian, J. Xu, J. Zhou
  UCLA, Los Angeles
• E.R. Arab
  PBPL, Los Angeles
• R.B. Yoder
  Manhattanville College, Purchase, New York

This paper ex­tends the physics of the Mi­cro-Ac­cel­er­a­tor Plat­form (MAP), which is in de­vel­op­ment as an op­ti­cal struc­ture for laser ac­cel­er­a­tion of rel­a­tivis­tic elec­trons. The MAP is a res­o­nant, op­ti­cal-scale, slab-sym­met­ric de­vice that is fab­ri­cat­ed from di­elec­tric ma­te­ri­als using lay­er-de­po­si­tion tech­niques. For stand-alone ap­pli­ca­tions, low-en­er­gy elec­trons (beta ~ 0.3) must be syn­chronous­ly ac­cel­er­at­ed to rel­a­tivis­tic speeds for in­jec­tion into the MAP. Even lower en­er­gies are de­sired for other par­ti­cle species (e.g. pro­tons or muons). In this paper, we pre­sent de­sign and sim­u­la­tion stud­ies on a ta­pered ge­om­e­try and as­so­ci­at­ed cou­pling scheme that can pro­duce syn­chronous ac­cel­er­a­tion at beta < 1 with­in a MAP-like struc­ture.