Jefferson Science Associates, LLC

Southeastern Universities Research Assn., Inc.

Southeastern University Research Assn., Inc.

Geoffrey A Krafft

Dunxiong Wang

A method for the production of extremely wide bandwidth THz radiation comprising: delivering an electron beam from a source to an undulator that does not deflect the angle or transversely move the electron beam; and optimizing the undulator to yield peak emission in the middle of the THz band (1 THz). These objectives are accomplished by magnetically bending the orbit of the incoming electron beam in the undulator according to the function x(z)=xexp(&#x2212;z/2&#x3c3;) and controlling the transverse magnetic field to be B(z)=B(1&#x2212;z/&#x3c3;)exp(&#x2212;z/2&#x3c3;).

Method for the production of wideband THz radiation

According to the present invention, there is provided a compact source of intense THz radiation comprising a short bunch, low energy particle beam source, an accelerator cavity and an electromagnetic wiggler. Application of state-of-the-art superconducting accelerating structures and beam recirculation allows such a THz radiation source to have a small footprint and high average intensity without the need of the larger equipment necessary to produce the large charge per bunch generally associated with the production of THz radiation. Consequently, low emittance electron beams can be used to produce emitted THz radiation of high average brilliance.

Intense and compact THz radiation source

An application accelerator system for monitoring the gain of a free electron laser. Coherent Synchrotron Radiation (CSR) detection techniques are used with a bunch length monitor for ultra short, picosec to several tens of femtosec, electron bunches. The monitor employs an application accelerator, a coherent radiation production device, an optical or beam chopping device, an infrared radiation collection device, a narrow-banding filter, an infrared detection device, and a control.

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Newport News, VA, United States of America

Geoffrey A Krafft