Browse Prior Art Database

X Ray Laser Resonator

IP.com Disclosure Number: IPCOM000081402D
Original Publication Date: 1974-May-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Spiller, E: AUTHOR [+2]

Abstract

A resonator has been devised for providing feedback at x-ray wavelengths using temperature controlled waveguides.

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X Ray Laser Resonator

A resonator has been devised for providing feedback at x-ray wavelengths using temperature controlled waveguides.

In the instant case, the feedback system that is compatible with an x-ray amplifying medium is disposed along the length of that medium. Fig. 1 is a front view and Fig. 2 is an edge view of the x-ray lasing system. A medium 2 is chosen so that when pumped by a beam 4, it becomes an amplifying medium for x-rays. Surrounding the active medium along its length are waveguide cladding members 6, having a lattice parameter appropriately matched to at least one of the amplified x-ray wavelengths.

Fig. 3 is a cross section of the structure taken along a line defined by the x- ray beam. In order that feedback occur at vacuum wavelength Lambda (m), the following relationship must hold, namely, n sin Theta (m) = q Lambda m Over d2, where Theta (m) = bounce angle for waveguide mode m, d = lattice spacing of the crystalline material forming the waveguide walls, q is the Bragg reflection order, and n is the refractive index of the inverted medium in the central core of the waveguide. If it is assumed that n sin Theta (m) = 1, the equation becomes Lambda = 2d/g.

Some of the possible matches between x-ray emission lines and crystal structures are shown in Table 1 for different values of of q, Lambda, 2d/g, and x- ray source that are compatible with a chosen waveguide material.

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It is to be understood that if the final x-ray amplif...