Experimental Physics and
Industrial Control System

I am looking for a quick survey of people with a xspress3 from Quantum Detectors.

Do you you have any feedback on the driver?

Have you made any changes to the EPICS driver that aren't GiHub? If so, are you willing to put it up on GitHub?

I have a fork of Nick Rees' github repo that I use for our Xspress3.  I changed many of the (weirdly, for a machine from a vendor) DLS-specific configuration, so that it would build well on the system provided by Quantum.  

I also added trivial loading of "simple_mca.db" from the Mca record so that "normal" (IMHO) MCA-style ROI variable names could be used, to act more like any other multi-element MCA.  There isn't support code to have these ROIs actually work to update counts and so on.   I use client code to copy these ROI placeholders to the live Xspress3 ROIs.  Using a "normal" Mca record would certainly be something to consider.

I trimmed many of the useless attributes from being saved to HDF5 files (for example, ROI definitions were being saved at each pixel -- not a lot of extra data, but certainly unnecessary). 

I worked on saving data as Float32 instead of Float64.  Float64 is simply not necessary for this data.   In fact, like the saving of the ROI limits at each pixel, it sort of demonstrates a fundamental lack of understanding of what the detector does.

I made a Pull Request against Nick's repository in January.  It has not been merged, and Nick's repo has not been updated since. I had taken this to mean that no one else was working on this code.

Meanwhile, Nick wrote: