Feature: IMAS(IDS) via OMAS

[kripnerl]

The first implementation of the first part of the IMAS IDS reader

This pull request server is more for discussion - it is not ready yet. Please let me know what you think about this approach and what should this pull request contains.

OMAS package serves as a thin layer between the IMAS database and the world. It allows interfacing the data to various formats. Therefore, I am using it to implement this code.

TODO:

• Add multi-coil test
• Read the first wall
• Read circuit description
• Construct complete freegs.Machine from the IDS.
• Read sensors.
• Properly test.
• coil current slices
• check ids control section and find compatibility
• Write to documentation list of supported (required fields)

[bendudson]

This would be a great feature to have. Thanks @kripnerl !
What is the recommended way to test this? Does OMAS have inputs that we could include in an automated test?

[kripnerl]

This would be a great feature to have. Thanks @kripnerl ! What is the recommended way to test this? Does OMAS have inputs that we could include in an automated test?

I am currently using ods = omas.ods_sample(), and I will test it on our created machine description. I also plan to extend the feature and create some "synthetic" tokamak in OMAS description with all the features (including circuits and multicoils). The sample includes only a simple rectangular coil and a shaped coil. Eventually, I can create a pull request to OMAS to include this extended example. I assume it will be appreciated.

[kripnerl]

Ok, it seems to me it is ready for review. Please answer me questions I left in #95 . Specifically, please check whether I treat the filamentary coil properly.

This implementation is quite minimalistic, but for me, it fulfils most of my needs. One could read a lot of other structures supported by FreeGS (sensors, constraints, equilibrium)... At least reading/saving equilibria is on my todo list. But I assume it can be done in other MR.

I will also not be available next week, therefore I will able to implement review comments just after that.

[kripnerl]

Since I do not have any connection to any IMAS db at the moment. May I ask somebody, who do have gateway or iter account to try to load something? How to are here:

• uda
• iter