תקציר
It is proposed to utilize the effect of negative mass for stabilization of the effective axial size of very dense and short electron bunches produced by photo-injector guns by using combined undulator and strong uniform magnetic fields. It has been shown that in the "abnormal" regime, an increase in the electron energy leads to a decrease in the axial velocity of the electron; due to the negative-mass effect, the Coulomb repulsion of electrons leads to their attraction and formation of a fairly stable and compact bunch "nucleus." An undulator with a strong uniform magnetic field providing the negative-mass effect is designed for an experimental source of terahertz radiation. The use of the negative-mass regime in this experiment should result in a long-pulse coherent spontaneous undulator emission from a short dense moderately relativistic (5.5 MeV) photo-injector electron bunch with a high (up to 20%) efficiency and a narrow frequency spectrum.
שפה מקורית | אנגלית |
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מספר המאמר | 163505 |
כתב עת | Applied Physics Letters |
כרך | 107 |
מספר גיליון | 16 |
מזהי עצם דיגיטלי (DOIs) | |
סטטוס פרסום | פורסם - 19 אוק׳ 2015 |