High-Power Microwave Switch Employing Electron Beam Triggering
Small Business Information
258 Bradley Street, New Haven, CT, 06510
AbstractDevelopment of accelerator structures that can sustain acceleration gradients of ~150 MeV/m are required in order to build a future multi-TeV collider. High-power facilities for testing these structures do not generate sufficiently-high peak powers, hence RF pulse compressors are needed to provide power multiplication. However, active RF pulse compressors are limited in peak power due to RF breakdown, mainly on the surfaces of non-metallic elements within their active switches. This project will investigate a high-power RF switch concept in which the active element is a pulsed electron beam. In this approach, the switch could operate at higher peak power levels, because no insulating elements Â¿ where breakdown might occur Â¿ would be present within the switch. In Phase I, three prototype electron-beam-triggered switches were designed and built, each with different cathode and anode geometries. With these switches connected to an RF storage resonator, low power tests were conducted, and compressed pulses with peak power gains in the range of 10:1 to 20:1 were observed. In Phase II, a high-power version of electron-beam-triggered switches will be designed, and prototypes will be built and tested. The goal is to produce compressed pulses in the range of 150-200 MW, with pulse widths in the range of 50-100 ns, power gains in the range of 10:1-15:1, and efficiency higher than 60%. Commercial Applications and other Benefits as described by the awardee: Development of structures that can sustain high accelerating gradients without an undue probability of breakdown, and which can be the basis for a future multi-TeV electron-positron collider, should hasten the day when the multi-TeV collider will be built. Once the multi-TeV collider is ready for construction, many commercial companies will benefit from the multi-million dollar manufacturing contracts for the accelerator structures and other elements in the collider
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