ICP Torch Induction Structure for Uniform, Robust Plasma
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Solution Overview
Problem
Many inductively coupled plasma (ICP) devices struggle to generate robust plasma that can ionize challenging samples without extinguishing, particularly when handling difficult matrices, and existing coil-based induction devices result in uneven plasma temperature.
Innovation Solution
The use of a helical structure and a non-helical structure with specific apertures and electrical connections to form an induction field within an ICP torch, which creates a more robust plasma by optimizing the spacing and alignment of these structures to receive radio-frequency electric current and promote even plasma generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a traditional coil-based induction device is used, then the device structure is simple, but the plasma temperature is uneven and plasma robustness is poor
Solution Approach 1:
The induction device is segmented into multiple functional components: a helical structure with first and second legs, a flat structure with corresponding legs, and multiple apertures. This segmentation allows different regions to serve different purposes - the helical structure generates the primary induction field while the flat structure provides geometric control, resulting in more uniform plasma temperature distribution compared to traditional single-coil designs.
2Reliability
If existing ICP devices are used, then the device operation is straightforward, but the plasma cannot handle challenging samples without extinguishing
Solution Approach 1:
The invention applies local quality by creating regions of different electromagnetic field intensities through the helical and flat structures. The helical structure concentrates induction in certain zones while the flat structure modifies the field distribution locally, creating optimal conditions for robust plasma that can handle challenging samples. This localized field optimization enhances plasma stability without requiring complex operational procedures.
3Reliability
If a helical structure with specific aperture configuration is used, then plasma robustness is improved, but the device complexity increases
Solution Approach 1:
The invention merges the helical structure and flat structure into a single integrated induction device assembly. The first and second legs of the helical structure align with corresponding legs of the flat structure, creating a unified electromagnetic field generation system. This combination achieves superior plasma robustness while maintaining structural coherence, avoiding the need for multiple separate complex components.
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 configuration enables the generation of a robust plasma capable of handling challenging samples, as evidenced by reduced power requirements and increased methanol flow without plasma extinction, demonstrating improved plasma stability and efficiency.
Implementation Method 1
an induction device configured to receive a radio-frequency electric current to inductively energize the auxiliary gas to produce a plasma
Implementation Method 2
configured to receive a radio-frequency electric current to inductively energize the auxiliary gas
Data Source
AI summary
An induction device includes a helical structure including a first aperture, and a non-helical structure including a second aperture. The first and second apertures define a passageway that is configured to receive a portion of a body of an inductively coupled plasma (ICP) torch.