Topic
Shields
About: Shields is a research topic. Over the lifetime, 1456 publications have been published within this topic receiving 10896 citations.
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Patent•
31 Oct 2002
TL;DR: In this paper, a plate type photosensitive glass is exposed by an ultraviolet-ray light source at a pitch which is (n) (n: integer) times as large as the pixel pitch of an X-ray detection part by using a photomask to carry out crystallization through heat treatment, and after re-exposure is performed, etching is carried out to form grating grooves in an Xray incidence direction.
Abstract: PROBLEM TO BE SOLVED: To provide a two-dimensional array type radiation detector which removes two-dimensionally scattered X rays and generates neither fringes of interference with a pixel pitch. SOLUTION: A plate type photosensitive glass 1 is exposed by an ultraviolet- ray light source at a pitch which is (n) (n: integer) times as large as the pixel pitch of an X-ray detection part by using a photomask to carry out crystallization through heat treatment, and after re-exposure is performed, etching is carried out to form grating grooves in an X-ray incidence direction. Then the grooves are filled with X-ray absorbers to manufacture a grid which has two-dimensional top-surface longitudinal groove shields and top-surface lateral groove shields 3 on the top surface and reverse-surface longitudinal groove shields 2a and reverse-surface lateral groove shields 3a in two dimensions on the reverse surface. Then the grid is arranged precisely on the front of an X-ray detection part composed of a scintillator 7, a photoelectric converting element 6, and a scanning circuit provided on a TFT glass substrate 5 so that the grid matches with pixels by using spacers 4.
5 citations
TL;DR: In this article, a patterned ground shield and a floating shield are proposed to improve the performance of millimeter-wave transformers, and their influences in terms of inductance, quality-factors, coupling coefficients and minimum insertion loss are evaluated through measurement and electromagnetic simulations.
Abstract: Shielding structures intended to improve the performance of millimeter-wave transformers are presented. The loss mechanisms of the components are discussed and the losses related to the silicon substrate are shown to be the most relevant. A patterned ground shield and a floating shield are detailed and their influences in terms of inductance, quality-factors, coupling coefficients and minimum insertion loss are evaluated through measurement and electromagnetic simulations. Results indicate that quality-factors are deteriorated by the use of patterned ground shields, whereas the use of floating shields allows a slight improvement without degrading other characteristics of the transformer.
5 citations
Patent•
09 Dec 2010
TL;DR: In this paper, a method for manufacturing the magnetic head includes a process in which the groove parts 25a, 25b1 and 25b2 are formed in a nonmagnetic layer by using an etching mask layer having a first-third aperture parts.
Abstract: PROBLEM TO BE SOLVED: To make a precise alignment between a magnetic pole layer and two side shields and to control the shapes of the magnetic pole layer and two side shields. SOLUTION: A magnetic head includes: a magnetic pole layer 12; side shields 13C1, 13C2; and an accommodation layer 25 having groove parts 25a, 25b1 and 25b2 which accommodate the magnetic pole layer 12 and the side shields 13C1, 13C2. A method for manufacturing the magnetic head includes a process in which the groove parts 25a, 25b1 and 25b2 are formed in a nonmagnetic layer by using an etching mask layer having a first-third aperture parts. This process includes: a step in which the second and third aperture parts are covered with a first mask and etching is made to the nonmagnetic layer by using the first aperture part to form the groove part 25a; and a step in which the first aperture part is covered with a second mask and etching is made to the nonmagnetic layer by using the second and third aperture parts to form the groove parts 25b1, 25b2. COPYRIGHT: (C)2011,JPO&INPIT
5 citations
01 Jan 1966
TL;DR: In this paper, a series of radiation shields of low emissivity is separated by insulating spacers under a pressure below 10-5 mm Hg absolute, during ground hold and boost.
Abstract: The use of high-energy cryogenic fuels has imposed demands for effective design and application of superinsulation for advanced tank designs. The high effectiveness of multilayer superinsulations is achieved by a series of’ radiation shields of low emissivity. The shields may be separated by insulating spacers under a pressure below 10-5 mm Hg absolute. During ground hold and boost, the insulation is exposed to the atmosphere unless it is sufficiently shrouded. This paper will not discuss these transient conditions, but rather will be concerned only with the subsequent space performance.
5 citations
08 Nov 2018
TL;DR: In this article, a novel receiver design concept that implements photovoltaic (PV) cells on heat shields and bellows shields to capture optical spillage from central receiver and parabolic trough concentrating solar power (CSP) plants, generating electricity from concentrated light that would otherwise be wasted.
Abstract: This paper evaluates a novel receiver design concept that implements photovoltaic (PV) cells on heat shields and bellows shields to capture optical spillage from central receiver and parabolic trough concentrating solar power (CSP) plants, generating electricity from concentrated light that would otherwise be wasted. A combination of conventional silicon and multi-junction concentrating PV (CPV) cells were evaluated to accommodate regions of both high and low solar fluxes on the shields. Estimates from existing CSP plants indicate that the irradiance on central-receiver heat shields can be well over 100 kW/m2 near the receiver tubes, but lower fluxes can occur in distant regions or in parabolic trough applications. A technoeconomic study was performed to estimate the levelized cost of energy (LCOE) for these systems as a function of several cost and performance factors, such as irradiance, PV cell type, and cooling conditions.
5 citations