Referee Report by H. H. Gutbrod for

Precision Laser Metrology for Accelerators and Detector Complexes Prolongation of the project for 2022-2023

In my last evaluation in 2018 I wrote:

The know-how of this collaboration with CERN will benefit JINR on the technical side in present or future scientific JINR programmes, but only, if the DLNP team is addressing and solving the optical and electronic problems independent of the Western sources. This could lead to a further modernization of the scientific/technical infrastructure at JINR, benefitting present and future research projects of JINR.

The scientific contribution of the DLNP team in exploiting the present and future data has not been shown convincingly, nor the application of the technology.

At present, I cannot give a positive evaluation unless I see efforts of solving problems mentioned above, and those expressed as fears in the proposal. As presented it is not a certain project for young scientists, both in technology development at JINR nor in financing (although the latter will be solved soon, I guess).

However, this project could be taken out of this HEP PAC scientific evaluation and decided on by management decision for the development of the infrastructure of JINR.

This years proposal is based on very good improvement of the parameters of the Precision Laser Inclinometer. The activities have been intensified with new technologies(e.g., cryogenic liquids)

and intention is to use a monolithic Compact PLI not only in various large scale scientific installations, but also for warning systems against earthquakes. The group has also extended its contact to the international projects.

The filled out questionnaire is answering well all the questions.

I recommend approval of the extension and rank the proposed project as a very good project for the development of the infrastructure of JINR, allowing JINR to purse participation with high precision technology in large scale scientific infrastructures and to contribute to early warning systems for communities endangered by potentially large earthquakes.