Betatron Radiation and Bremsstrahlung in the Interaction of Intense Laser Pulse with Solid Target
, Ran Li 2, Libao Ju 2, Ke Jiang 2, Mingyang Yu 2, Taiwu Huang 2, Hua Zhang 2, Sizhong Wu 2, Bin Qiao 1, Cangtao Zhou 2,* and Xiantu He 1,3,*
Round 1
Reviewer 1 Report
The finding in this work is very interesting, however a lot of work (in the writing of the paper) are required, according to the following comments:
- The abstract should be informative and follow the structure of an abstract (introduction, main problem, used methodology and the main results).
- Do not use equations in the abstract.
- In the introduction section:
+ Give a brief about the main work using state-of-the-art related work. + Use many related work (simulation and experiment) to compare your work with them later.
- In the simulation setup section:
+ Illustrate the simulation tool.
+ There is no need for Table1, may be in the supplementary materials.
- The methodology section is missed.
- All used parameters and symbols should be defined and illustrated in a figure (if possible).
- Separate the simulation results in different subsections to make it easy to understand and follow.
- What is the optimum design you got.
- The conclusion section is not clearly given (including the main results).
Major revision is needed.
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The authors use a particle-in-cell (PIC) simulation including Monte-Carlo implementation of bremsstrahlung to study electron acceleration and radiation processes in the interaction of intense laser pulses with a solid target. The energy conversion efficiencies of synchrotron radiation and bremsstrahlung are investigated in the laser intensity (IL) range of 1019<I<1022 W/cm2 as a function of characteristic laser and plasma properties. It turns out that in particular the laser pulse width and the length of the generated transparent preplamsa are important parameters that determine the radiation process at work. The authors could show that the dominant radiation mechanism can be controlled by adjusting critical laser pulse parameters, such as laser contrast, intensity, and spot size.
This is a very nice work. The introduction is easy to read and the simulation results are clearly presented and discussed. However, the work would extremely benefit from a comparison of the presented simulation results with published experimental data. How do they relate to/support/contradict each other? Without this important discussion the manuscript is not yet ready for publication. Also the discussion of previous simulation results describing the radiation processes in laser-generated plasma seems to me rather short.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
The authors have addressed all questions and concerns. The paper is ready for publication.
