Circular Cavities with Corrugated Mirrors Excited by Wave Beams

A wave flow circulating within a mirror system can be coupled to an external wave flow by a mirror corrugation. Such a cavity can function as a resonant ring or as a microwave pulse compressor.     

Microwave pulses compressed in a barrel-shaped resonator with screw corrugation

The microwave pulse compressor proposed previously [1], having the form of an oversized waveguide resonator with a screw-corrugated inner surface, was constructed and experimentally tested. A fivefold compression of microwave pulses with a 70% efficiency was obtained in a 3-cm wavelength range.     

Beam stability issues in very large hadron collider

The Very Large Hadron Collider (VLHC) is a superconducting proton–proton collider with approximately 100 TeV c.m. energy and approximately 10³⁴ s⁻¹ cm⁻² luminosity [G. Dugan, in: Proceedings of the 1999 IEEE Particle Acceleration Conference, New York, 1999, p. 48.]¹ Currently, beam dynamics in this future accelerator is the subject of intensive studies within the framework of the US-wide VLHC R&D program. This presentation summarizes recent developments in the field. Besides general discussion on relevant VLHC parameters, we consider various beam instabilities and ways to avoid them. Finally, we outline possibilities for theoretical and experimental R&D.     

Lease contract in a consumer goods shop

Dneprodzerzhinsk Industrial Institute. Dnepropetrovsk Metallurgical Plant. Translated from Metallurg, No. 6, pp. 21–23, June, 1990.