# The Veritas Beamline

The VERITAS beamline at MAX IV Laboratory in Lund, Sweden, is a soft X-ray beamline designed for RIXS(Resonant inelastic x-ray scattering) studies. 
It provides high-brightness, high-resolution X-rays in the energy range of 250-1500 eV, enabling detailed investigation of electronic structures of gas, Solid and liquids.

The manual describe experimental setup at the endstation and how to operate the beamline for experiment. For detailed beamline specifications and optics, please visit the [webpage](https://www.maxiv.lu.se/beamlines-accelerators/beamlines/veritas/).

```{figure} img/arm_3.png
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The Veritas spectrometer at 3 different Q-angles. Photo: L. Kjellsson
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# The Endstation and Sample Environments

We can operate in all three sample environments, Solid, Liquid and Gas. Based on the sample environment, we modify the endstation. Changes range  from very subtle to more extensive. 

## Endstation for Solid and gas samples

**For solid and gas samples**, we use the Q-chamber (measurement chamber), upper chamber and load lock chamber as shown in the figure. We can also set different scattering angles, thanks to the rotatable Q-chamber. The only difference is the requirement to swap the sample rods.

```{figure} img/endstation_1.jpg
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Endstation for solid and gas experiments
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### Solid state sample rod
#### 4-axes and manual 5th axis manipulation
```{figure} img/solid_state.jpg
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Solid state sample rod with detachable heads according to user need.
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#### 6-axes manipulation cryo-rod
```{figure} img/6axes.jpg
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Solid state sample rod with a total 6-axes manipulation.
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### Sample rod for gas experiments
```{figure} img/gascell.jpg
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The sample rod with a gas-cell (inset). Photo: L. Kjellsson
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## Endstation for Liquid samples

**For liquid samples**, the changes are more extensive as we need to swap the Q-chamber with a differentially pumped chamber to accomodate the liquid jet sample rod, cold trap and ice breaker. Since this chamber is not rotatable, we are limited to 90 deg scattering angle.

```{figure} img/endstation_2.jpg
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Endstation for liquid experiments
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### Sample rod for liquid experiments
```{figure} img/liquid_jet.jpg
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The liquid jet sample rod
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