# Starting the experiment

1. Open the valve between Preparation and Analysis chambers;
2. [Bring sample into measurement position](https://arpes-1-2.gitbook.io/arpes-1-2/manuals-arpes-1-2/multiax-manipulator-control#moving-between-preparation-and-analysis-chambers) in the Analysis chamber;
3. Make sure that beam is not used and beamshutter is closed;
4. Take the beam using [Beamline Control](https://arpes-1-2.gitbook.io/arpes-1-2/manuals-arpes-1-2/changing-light-parameters#taking-the-beam);
5. Switch on the [beam position monitor](https://arpes-1-2.gitbook.io/arpes-1-2/manuals-arpes-1-2/starting-the-experiment/auto-beam-position-control);
6. Set [light polarization](https://arpes-1-2.gitbook.io/1squared/manuals-arpes-1-2/starting-the-experiment/changing-light-parameters#changing-light-polarization), [photon energy](https://arpes-1-2.gitbook.io/arpes-1-2/manuals-arpes-1-2/changing-light-parameters#changing-photon-energy), \[width of apertures (optional)];
7. Check that suitable [beamline exit slit](https://arpes-1-2.gitbook.io/arpes-1-2/manuals-arpes-1-2/beamline-and-analyzer-slits#beamline-exit-slit) and [analyzer slit](https://arpes-1-2.gitbook.io/arpes-1-2/manuals-arpes-1-2/beamline-and-analyzer-slits#analyzer-slit) are being used;
8. [Setup SES program](https://arpes-1-2.gitbook.io/arpes-1-2/manuals-arpes-1-2/starting-the-experiment/working-with-ses) (data types, folder, sample name, etc.);
9. Switch on analyzer electronics by tumbler and open the beamline valves (starting from Experiment);
10. Open in the SES menu "Calibration" -> "Voltages" and set kinetic energy where you expect to see the bands;
11. Find signal from the sample using joystick and camera images. Sticker roughly marks position of the beam (camera image under the sticker should be in focus).
12. Fine tune the position using [MultiAx ](https://arpes-1-2.gitbook.io/arpes-1-2/manuals-arpes-1-2/starting-the-experiment/multiax-manipulator-control)"Manual/Steps" or "Virtual axes" tabs. Y direction is along the beam (use for focusing).
13. Have a lot of nice measurements!
