X-ray Detector Heating Layer Segmentation for Temperature Stability
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Solution Overview
Problem
Direct-converting X-ray detectors experience temperature gradients and power dissipation issues due to uneven heat dissipation and design constraints, leading to image artifacts and reduced energy resolution, which are exacerbated by components on the sensor board and varying temperature distributions.
Innovation Solution
A detector module with a stacked structure comprising a sensor layer, readout layer, and a divided heating layer with individually controllable partial heating areas, connected via a wiring unit, allowing for localized temperature stabilization and uniform heat dissipation across the sensor layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heating layer is used to stabilize the temperature of the X-ray detector, then temperature stability is improved, but device complexity increases due to additional components and wiring requirements
Solution Approach 1:
The heating layer is divided into multiple independently controllable heating zones that can be addressed separately through the wiring unit. This segmentation allows selective heating of specific regions based on local temperature requirements, reducing the need for uniform high-power heating across the entire detector surface, thereby improving temperature stability while managing power consumption and complexity
Solution Approach 2:
Different regions of the detector receive customized heating power through the divided heating zones. The wiring unit enables independent control of each heating zone, allowing local temperature stabilization tailored to specific operational requirements or defect locations, rather than applying uniform heating across the entire sensor board
2Ease of operation
If components are placed on the underside of the sensor board, then electrical connectivity and support functions are achieved, but heat dissipation efficiency deteriorates due to blocked thermal pathways
Solution Approach 1:
The heating layer is positioned asymmetrically on the sensor board, strategically placed in regions where thermal pathways are least obstructed by underlying components. This asymmetric arrangement optimizes heat dissipation by directing thermal energy toward areas with better thermal conductivity and fewer blocking elements, compensating for the presence of passive components and connectors
3Temperature
If uniform heating is applied across the entire sensor board, then temperature stability is improved, but energy consumption increases and localized temperature control is reduced
Solution Approach 1:
The heating layer is divided into multiple independently controllable heating zones that can be addressed separately through the wiring unit. This segmentation allows selective heating of specific regions based on local temperature requirements, reducing the need for uniform high-power heating across the entire detector surface, thereby improving temperature stability while managing power consumption
Solution Approach 2:
The heating power for each zone can be independently adjusted by modifying electrical parameters (voltage, current) supplied to each heating element through the wiring unit. This enables dynamic control of heating intensity in different regions, allowing the system to achieve temperature uniformity with lower overall energy consumption by heating only where necessary
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
The solution effectively stabilizes the temperature of the detector module, minimizing temperature gradients and improving image quality by allowing precise control of heating power distribution, thus enhancing the energy resolution and count rate of the X-ray detector.
Implementation Method 1
a heating layer (2), in particular a self-heating layer, which is arranged on the sensor board (11) and which has a plurality of heating zones (101, 102, ... 116)
Implementation Method 2
a thermal coupling to a heat sink that is as close to the entire surface area as possible is desirable
Implementation Method 3
When X-rays strike the sensor layer, electron-hole pairs, i.e., pairs of negative and positive charge carriers, are generated
Implementation Method 4
Applying a voltage to the sensor layer or its surface separates the charge carriers, causing them to move towards the oppositely charged electrodes or surfaces of the sensor layer
Implementation Method 5
a thermal coupling to a heat sink that is as close to the entire surface area as possible is desirable
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a detector module (1) for an X-ray detector comprising in a stacked structure (5) a sensor layer (11), a readout layer (17), a heating layer (2), and a wiring unit (19) downstream of the heating layer (2) in the stacked structure, wherein the heating layer (2) is divided into a plurality of partial heating areas (101, 102, ..., 116), each of which has at least one heating element (27) and each of which can be individually contacted for a power supply, and wherein the partial heating areas (101, 102, ..., 116) of the heating layer (2) are each contacted by means of the downstream wiring unit (19) and at least a subset of the partial heating areas (101, 102, ..., 116) are interconnected for the power supply.