Available Technology

ULTRA BROAD BAND CONTINUOUSLY TUNABLE ELECTRON BEAM PULSER

An ElectroMagnetic-Mechanical Pulser (“EMMP”) generates electron pulses at a continuously tunable rate between 100 MHz and 20-50 GHz, with energies up to 0.5 MeV, duty cycles up to 20%, and pulse widths between 100 fs and 10 ps. A dielectric-filled Traveling Wave Transmission Stripline (“TWTS”) that is terminated by an impedance-matching load such as a 50 ohm load imposes a transverse modulation on a continuous electron beam. The dielectric is configured such that the phase velocity of RF propagated through the TWTS matches a desired electron energy, which can be between 100 and 500 keV, thereby transferring electromagnetic energy to the electrons. The beam is then chopped into pulses by an adjustable aperture. Pulse dispersion arising from the modulation is minimized by a suppressing section that includes a mirror demodulating TWTS, so that the spatial and temporal coherence of the pulses is substantially identical to the input beam.

Inventors: 

Jing Chunguang, Qiu Jiaqi, Baryshev Sergey V, Lau June W, Zhu Yimei

Patent Number: 
10,319,556
Internal Laboratory Ref #: 
15-036US1
Patent Issue Date: 
June 11, 2019
Phone: 
301-975-2573
Email: 
tpo@nist.gov
Lab Representatives
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