====== Generating Inverse Maps for Data Analysis ======

As of October 2022, S800 inverse maps can be generated by the map server accessible at https://maps.frib.msu.edu/

==== Basic Usage ====

The use of the map server should be self-explanatory. See the screenshot below. Open the web interface and type in what is necessary, including the excitation currents for the four magnets of the spectrograph, namely
  * Q1 or I256QA (old) or Q_D2566 (new)
  * Q2 or I258QB (old) or Q_D2572 (new)
  * D1 or I265DS (old) or DV_D2597 (new)
  * D2 or I269DS (old) or DV_D2648 (new)
These current values can be found in the beamline savesets files that can be accessed at I:\departments\AcceleratorPhysics\EXP-AP\savesets\hlc_th_exp (or on the EXP network the path is /files/shared/ap/savesets/hlc_th_exp/). Note that this is only visible from the internal network in the lab. (Cf. Although not neede for the S800 analysis, the savesets files for ARIS can be found in I:\departments\AcceleratorPhysics\FTC-AP\savesets\hlc_vps )

{{::screen_shot_2023-03-29_at_11.00.21_am.png|}}

When the inverse map is successfully calculated, this should be sent out to the email address that has been typed in. The inverse-map file "invmap.inv" is simply a text file (ASCII) which looks like this.

{{ :screenshot_2020-02-14_09.56.09.png?nolink |}}

If you encounter an error screen like the one shown below, it is likely that the server has issues with the configurations. Please contact an S800 Instrument Scientist (pereira@frib.msu.edu or noji@frib.msu.edu).

{{:wiki:mapserver_error.png|}}
==== Other Information ====

Some practical information can be found at [[https://github.com/pcbend/GRUTinizer/wiki/S800-Inverse-Map---All-of-Your-Questions-Answered|S800 Inverse Map All of Your Questions Answered]] in Peter Bender's Git repository.