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X-ray focusing using microchannel plates. Part 1: theory

Technical Report:

Abstract

A detailed analysis of the focusing and collimation of x-rays by microchannel plates (MCPs) is presented. The focusing effect derives from external reflection of grazing-incidence rays at the interior surfaces of the hollow channels of the MCP, and is similar to optical focusing by a thin lens. The point spread function of an MCP is given, taking into account surface roughness and misaligned channels. The calculations based on multiply reflected rays and skew rays, and is valid for a spherically curved MCP of any thickness. The surface roughness calculation utilises a vector perturbation theory for surface scattering, which expresses the angular distribution of scattered radiation, and consequently the point spread function, as a sum of a specularly reflected component and a diffusely reflected component. For comparison with experimental results the effects due to a finite source and a detector aperture are also evaluated. 30 refs., 15 figs.
Authors:
Chapman, H N; Nugent, K A; [1]  Wilkins, S W [2] 
  1. Melbourne Univ., Parkville (Australia). School of Physics
  2. Commonwealth Scientific and Industrial Research Organization, Melbourne (Australia). Div. of Materials Science
Publication Date:
Dec 01, 1991
Product Type:
Technical Report
Report Number:
UM-P-91/30
Reference Number:
SCA: 430303; PA: AIX-23:005445; SN: 91000615801
Resource Relation:
Other Information: PBD: [1991]
Subject:
43 PARTICLE ACCELERATORS; BEAM OPTICS; X-RAY TUBES; FOCUSING; COLLIMATORS; PERFORMANCE; PLATES; SENSITIVITY; SURFACE PROPERTIES; THEORETICAL DATA; 430303; EXPERIMENTAL FACILITIES AND EQUIPMENT
Sponsoring Organizations:
Australian Research Council, Canberra, ACT (Australia)
OSTI ID:
10102445
Research Organizations:
Melbourne Univ., Parkville, VIC (Australia). School of Physics
Country of Origin:
Australia
Language:
English
Other Identifying Numbers:
Other: ON: DE92611804; TRN: AU9112340005445
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
55 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Chapman, H N, Nugent, K A, and Wilkins, S W. X-ray focusing using microchannel plates. Part 1: theory. Australia: N. p., 1991. Web.
Chapman, H N, Nugent, K A, & Wilkins, S W. X-ray focusing using microchannel plates. Part 1: theory. Australia.
Chapman, H N, Nugent, K A, and Wilkins, S W. 1991. "X-ray focusing using microchannel plates. Part 1: theory." Australia.
@misc{etde_10102445,
title = {X-ray focusing using microchannel plates. Part 1: theory}
author = {Chapman, H N, Nugent, K A, and Wilkins, S W}
abstractNote = {A detailed analysis of the focusing and collimation of x-rays by microchannel plates (MCPs) is presented. The focusing effect derives from external reflection of grazing-incidence rays at the interior surfaces of the hollow channels of the MCP, and is similar to optical focusing by a thin lens. The point spread function of an MCP is given, taking into account surface roughness and misaligned channels. The calculations based on multiply reflected rays and skew rays, and is valid for a spherically curved MCP of any thickness. The surface roughness calculation utilises a vector perturbation theory for surface scattering, which expresses the angular distribution of scattered radiation, and consequently the point spread function, as a sum of a specularly reflected component and a diffusely reflected component. For comparison with experimental results the effects due to a finite source and a detector aperture are also evaluated. 30 refs., 15 figs.}
place = {Australia}
year = {1991}
month = {Dec}
}