News

You may have not realized it, but TRIM.SP could not handle compositions with more than 5 elements (last elements were ignored). Well, now it can. A recent upgrade of the original FORTRAN code enables you to simulate the stopping distribution in compositions with up to 12 elements. During this upgrade, I also discovered and fixed some hidden bugs. These are not alarming and affect only boundary cases, so don’t worry your old TRIM.SP calculations were (most probably) fine.

Download the most recent version here. The source code is here.

The graphical user interface for TRIM.SP has been updated and polished. Users can now download RPM, DEB and Flatpak packages to install locally on their PCs. Windows users are encouraged to switch to Linux.

For those who would like to contribute to the development of this project or introduce their own changes, the full code is available on bitbucket.

The Andrew File System (AFS) is being phased out from PSI. All our data will now be saved on a new Network File System (NFS) drives. We took this opportunity to make the data folder structures uniform across all instruments. We adapted the SearchDB and musrfit tools to work with the NFS files and updated the look and feel of the graphical user interface. We hope that you like it.

Please report any issues with running these tools.

The “MusrROOT” have been used successfully for storing LEM data for many years. Since last year, all bulk muSR data have also been written in the new “MusrROOT” format, which offers many advantages including high time resolution, unlimited histogram length, well organized and modern structure providing a more complete information about experimental setup. This brings us one step closer to operating all muSR facilities at PSI using a single data acquisition system (DAQ) and the same data format. Therefor, starting November 2023, the search and fit tools on musruser.psi.ch will not support the old “PSI-BIN” and “PSI-MDU” formats. We recommend that all our users also avoid using these formats and adjust their software to work with “MusrROOT“.

Emil Zaya, a summer student at LMU/PSI, has created a new web application that allows users to plot the parameters obtained from musrfit.cgi directly on the browser, without the need to download the data. This brings us one step closer to being able to perform full muSR data analysis using a web browser and without the need to install any additional software on the user’s computer.

Try it out here: http://musruser.psi.ch/MusrPlot/ or via the link provided when you fit your data.

The TrimSP.cgi will be phase out and replaced by a new JavaScript version which is identical to the stand alone desktop version. New features include:

• Almost two-fold speed increase
• Addition of newly evaluated stopping power coefficients (thanks to Ryan McFadden). See “Other Parameters” tab to use this option. Further details can be found here.
• Better presentation of the data and figures.

Please give it a try and share any problems, issues or suggestions for improvements.

The code of TrimSP GUI has been modified to accept chemical formulae with non-integer coefficients. We have also created a stand-alone version of the software which can be downloaded here:

https://bitbucket.org/zaher-salman/trimsp

The musruser.psi.ch website have been upgraded to use WordPress.

Please feel free to use the comments to share idea, comment on musruse.psi.ch and suggest new feature and tools.