Experimental Study on Positronium Detection under Millimeter Waves Generated from Plasma Wakefield Acceleration

Round 1

Reviewer 1 Report

See attached file

Comments for author File: Comments.pdf

Author Response

We would like to express our sincere appreciation for your detailed and in-depth review evaluation. We cordially have prepared a response letter to reflect your review reviews as much as possible. And we have made every effort to reflect your opinions in the revised manuscript. Thank you very much for your considerate comments again. In the revised manuscript, the parts mentioned by Reviewer #1 are separated by red text, and the revised part is written in blue text.

• Please refer to the attached file (Response for Reviewer#1 comments (electronics-1901383)). 

Author Response File: Author Response.pdf

Reviewer 2 Report

To explore the application of Ps imaging technology, a Ps photoconversion technology has been demonstrated under THz EM resonance conditions. To facilitate the research, THz waves and Cherenkov radiation (CR) were generated using the ponderomotive force principle in the plasma wakefield state. This paper presents a detailed discussion of the application and the principle of the equipment. Original test results have been presented in the paper and the critical parameters are measured using proper instrumentations. Overall, this paper is complete and interesting. Here are some suggestions and comments:

1. Ln 180~182, as discussed, as TM01 mode is the designed mode, how much is the typical mode purity during operation (or simulation)?

2. As mentioned in the paper, this setup will provide experimental conditions for the in vivo imaging with Ps technology. Please provide the typical requirements of such a device to meet the application needs at the introduction section.   

Author Response

• We would like to express our sincere appreciation for your detailed and in-depth review evaluation. We cordially have prepared a response letter to reflect your review reviews as much as possible. And we have made every effort to reflect your opinions in the revised manuscript. In the revised manuscript, the parts mentioned by Reviewer #2 are written in green text.
• Please refer to the attached file (Response for Reviewer#2 comments (electronics-1901383)). 

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comment 1. Fig. 1 shows the frequency is slightly greater than 200 GHz. For any source to qualify as a terahertz source, it must produce at least >1 THz. Authors therefore should not use the term terahertz.

Line 149–150: “An artificial dielectric was devised to generate an electron beam in a relativistic region faster than an electromagnetic wave to generate Cherenkov radiation.”

Comment 2. Artificial dielectric … à huge conceptual confusion…

 

Reviewer’s further comments

In general, the authors still present a few concepts lacking clarity and soundness.

Since the revised article title has eliminated the term “terahertz,” yet, there are numerous places the terahertz term remains. To be consistent, the authors should remove all terahertz or THz term throughout the paper. They may use the term millimeter wave if that is justified by proper evidence.

Recommendation

Reduce number of images that are not necessary to make any scientific points. ideally, try to keep figures within 10, mainly data with minimal illustrations. This will reduce the number of pages.

Please resubmit after the necessary revision.

Comments for author File: Comments.pdf

Author Response

We would like to express our sincere appreciation for your detailed and in-depth review evaluation. We cordially have prepared a response letter to reflect your review reviews as much as possible. And we have made every effort to reflect your opinions in the revised manuscript. Thank you very much for your considerate comments again. In the revised manuscript, the revised part is written in red text.

 

Comment 1. Fig. 1 shows the frequency is slightly greater than 200 GHz. For any source to qualify as a terahertz source, it must produce at least >1 THz. Authors therefore should not use the term terahertz.

• Thanks for your correct point. We dropped the term THz right away and changed the term to millimeter waves (mmW).

Line 149–150: “An artificial dielectric was devised to generate an electron beam in a relativistic region faster than an electromagnetic wave to generate Cherenkov radiation.”

Comment 2. Artificial dielectric … → huge conceptual confusion…

• We're very sorry to confuse you with the vague expression "artificial dielectric". We used the appropriate term for simplicity and clarity as dielectric by re-expressing it in an appropriate word.

 

Reviewer’s further comments

In general, the authors still present a few concepts lacking clarity and soundness. Since the revised article title has eliminated the term “terahertz,” yet, there are numerous places the terahertz term remains. To be consistent, the authors should remove all terahertz or THz term throughout the paper. They may use the term millimeter wave if that is justified by proper evidence.

• We have changed the term THz to millimeter waves (mmW) as we fully agree with your comment. And the frequency band (G-band) of 203 GHz is generally included in the range of millimeter waves (mmW) (30 GHz to 1THz). So we tried to maintain consistency and clarity by using the term millimeter waves (mmW) instead of THz.

Recommendation

Reduce number of images that are not necessary to make any scientific points. ideally, try to keep figures within 10, mainly data with minimal illustrations. This will reduce the number of pages.

Please resubmit after the necessary revision.

• As per your opinion, we will reduce the number of Figures to less than 10 and make corrections again. (We reduced the number of images by reducing the number of unnecessary images and reducing the number of figures to 10, in your opinion, reducing the length of 6 pages.)

Author Response File: Author Response.pdf