X-ray Generation Device Ripple Phase Control

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Solution Overview

Problem

The irregular variation in the acceleration of the electron beam due to high voltage ripple components in X-ray generation devices leads to aberration and fluctuation in the electron beam spot size, reducing image resolution and accuracy.

Innovation Solution

The use of multiple high voltage power supplies connected in series, with controlled phase relationships between their ripple components, to stabilize the acceleration voltage and reduce aberration, ensuring consistent electron beam convergence and improved image quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single high voltage power supply is used to accelerate the electron beam, then the device structure is simple, but the ripple component causes irregular variation in electron beam acceleration leading to spot size fluctuation and reduced image resolution

Engineering Contradiction:

Improvepower supply structureVSAvoidimage resolution

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The single high voltage power supply is divided into multiple high voltage power supplies (first, second, and optionally third power supplies) connected in series. Each power supply generates a high voltage with a ripple component, and by controlling the phase relationship between these ripple components (substantially 180° apart for two power supplies, or 120° apart for three power supplies), the invention segments the voltage generation while canceling ripple effects, thus improving image resolution without excessive complexity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of treating the ripple component as purely harmful, the invention utilizes the ripple components from multiple power supplies and controls their phases to be substantially 180° (or 120°) apart. This converts the harmful ripple effect into a beneficial cancellation effect, where the ripple components neutralize each other, resulting in stabilized electron beam acceleration and improved spot size consistency

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Stability of the object's composition

If multiple high voltage power supplies are used to cancel ripple components, then the acceleration voltage stability is improved, but the device complexity increases

Engineering Contradiction:

Improveacceleration voltage stabilityVSAvoidpower supply structure

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The acceleration voltage generation is segmented into multiple independent high voltage power supplies, each contributing to the total acceleration voltage while providing phase-controlled ripple components. This segmentation allows for improved voltage stability through ripple cancellation while maintaining a modular structure that can be scaled (2 or 3 power supplies)

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention changes the phase parameter of the ripple components from arbitrary or identical phases to specifically controlled phases (substantially 180° apart for two power supplies, or 120° apart for three power supplies). This parameter change enables the ripple components to cancel each other out, achieving superior voltage stability without requiring complex filtering or regulation circuits

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach effectively suppresses the influence of ripple components on the electron beam, maintaining consistent spot size and enhancing the resolution and accuracy of X-ray images by stabilizing the acceleration voltage.

Implementation Method 1

first and second high voltage power supplies that are connected in series between the cathode and the target, and both of which accelerate the electron beam

Methodology Applied

Scientific EffectElectron beam acceleration: Electric Field

Implementation Method 2

an X-ray source has been per se known that generates X-rays by supplying a high voltage between a filament and a target, thus causing an electron beam to be emitted from the filament and to collide with the target

Methodology Applied

Scientific EffectX-ray generation: X-Ray

Data Source

PatentUS10645788B2X-ray generation device, X-ray device, and method for manufacturing structure

Publication Date: 2020.05.05 NIKON CORP

AI summary

An X-ray generation device that emits X-rays due to an electron beam emitted from a cathode arriving at a target, includes: first and second high voltage power supplies that are connected in series between the cathode and the target, and both of which accelerate the electron beam; and wherein the second high voltage power supply outputs a second high voltage so that, with respect to a phase of a ripple component of a first high voltage generated by the first high voltage power supply, a phase of a ripple component of the second high voltage generated by the second high voltage power supply has a predetermined relationship.