Design, Implementation and Experimental Validation of an ADCS Helmholtz Cage

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

Dear authors,

thank you for presenting an interesting paper.

I have only a few comments and recommendations.

It could be interesting to discuss the range of the generated magnetic field (1,5 G) in the Helmholtz cage versus the magnetic field of the Earth (up to 0,65 G). Can you compensate for it? Is the generated range sufficient after compensation?

Please discuss why the RMS difference in the Bx field is two orders higher than in the other axes (Table 2).

Please use the same intensity scale for better comparison of all the plots in Figure 13

Discuss the influence of the orthogonality of the coils on the uniformity of the magnetic field.

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

This paper details the design, setup and experimental validation of the ADCS Helmholtz cage, innovatively employs a robotic arm for 3D spatial magnetic field scanning, while analyzing background magnetic field disturbance sources and proposing mitigation strategies. Some suggestions are shown as shows

1. The fifth research objective in the introduction mentions “developing an analytical model that can be used for the closed-loop magnetic feedback controller”. Please supplement the core application scenarios in the paper.
2. Compared with the H-bridge controller, the Lx , Ly , and Lz coils significantly reduce the distortion of the magnetic field , but this lacks data support.
3. Please specify the spacing of the 5×5×5 point grid and the reason for the selection of the grid density.
4. Please systematically organize the discussion of error sources, quantify the values, and analyze their sources as well as contribution proportions.
5. In Section 3.4 (Data Calibration), summarize briefly the core steps of the calibration process inconcise textual form.

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

This article examines the measurement of Helmholtz cell parameters. This chamber creates a constant magnetic field within the cell. The topic of the article and the research itself are original, as the authors used three-dimensional scanning of the magnetic field structure within the Helmholtz cell.

A unique feature is that the authors took into account all possible sources of interference when scanning the magnetic field within the cell. This interference affects the structure and amplitude of the magnetic field. The magnitude of the influence of each external influence was determined. It is particularly noteworthy that the influence of external influences was proven experimentally.

The article is written in clear and understandable language. The research plan is clearly presented, the problem statement, solution methods, and conclusions are described. However, the authors should devote more attention to mathematically demonstrating the influence of each external influence on the amplitude and structure of the magnetic field. Using regression analysis and random process analysis, they should demonstrate that these influences are not random. These influences can be described using the theory of random processes, and errors can be calculated that can be taken into account during measurement.

The conclusions in the article fully correspond to the issues discussed in the paper. The conclusions are well-reasoned. However, since the questions in the article are practical in nature, the conclusions do not describe the practical application of the obtained solutions. The conclusions themselves could have been written in more detail. The application of such a chamber has a wide range of possibilities. The most promising direction is the study of attenuating coatings against magnetic fields.

All references in the article are appropriate.

I believe the article can be accepted as is. I would recommend the authors to describe in more detail the possible applications of the resulting Helmholtz cell using various practical examples, from growing crystals in a constant magnetic field to studying various attenuating coatings.

Author Response

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Author Response File: Author Response.pdf