# Beamtime Problem-Solving Guide

```{note}
If you are uncertain about the procedure, please consult the beamline scientist.
```

## Get familiar with setup
1. Get familiar with [LEEM2000](#LEEM2000) and [U-view](#U_view) software interface
2. Get used to checking the [pressure of chambers](./cooling_heating.md#gauges) often
3. Understand [high voltage rack](./cooling_heating.md#annealing-in-chambers), [interlock](./cooling_heating.md#interlocks) and [arc](./cooling_heating.md#when-hv-switches-off-due-to-an-arc)


## Before measurements
1. [Fix data storage path](./data_access.md#to-do-before-measurement) (must do before scan!)
2. [Sample remove from main chamber](./operating_loadlock.md#changing-sample-in-main-chamber) or [Sample insertion from load lock/air](./operating_loadlock.md#sample-insertion-from-air)
3. [Annealing/degasing](./cooling_heating.md#annealing-in-chambers) in preparation chamber or main chamber
4. [Sputtering in preparation chamber](./operating_prepchamber.md#sputtering-with-argon)
5. [Cooling in main chamber](./cooling_heating.md#cooling)

## Alignments and setup-relates
Alignment examples location: c:/program data/leem2000/2025alignment example
1. [How to switch on High Voltage Rack](./operating_microscope.md#prepare-the-setup-for-high-voltage)
2. [LEEM alignment](./operating_microscope.md#leem-alignment)
3. [Insert slit and apertures in LEEM mode](./operating_microscope.md#slit-and-apertures)
4. (Normally not needed) [Detailed alignment start with UV-PEEM](./operating_microscope.md#detailed-alignment-with-uv-peem-and-leem)
5. [What if camera is not responding?](./operating_microscope.md#camera-operating)

## Beamline (x-ray)
1. [How to open valve in front end](./data_access.md#open-valves-in-front-end) after beam dump
2. [How to align beamline](./data_access.md#beamline-alignment) before measurement

## Measurements 
1. [Table of available modes](./operating_microscope.md#modes) for checking which slit/aperture is needed 
2. [How to insert slit/apertures](./operating_microscope.md#slit-and-apertures)
3. How to set up [camera parameters for scangui](./data_access.md#scangui)
4. How to set up [sequencer  in scangui](./data_access.md#set-up-macroexecutor)
5. Example about how to [name data files](./data_access.md#naming-data-files)
6. Example about how to [determine beamline energy (range)](./data_access.md#examples-for-mapping-ranges)

### Change setup from LEEM to another mode
1. [XPEEM mode](./operating_microscope.md#xpeem) 
    * [Scan start voltage](./data_access.md#xpeem-scan-start-voltage)
    * [Scan beamline energy](./data_access.md#xas)
    * [Continuous acquisition when cooling/heating](./data_access.md#continuous-quick-acquisition)
    * [XMCD measurement](./data_access.md#collect-individual-image-for-xmcd-circular-left-circular-right)
    * [XMLD measurement](./data_access.md#collect-individual-image-for-xmld-linear-horizontal-linear-vertical)

2. [micro-XPS/Dispersive plane mode](./data_access.md#µ-xps-dp-mode)

3. [LEED mode](./operating_microscope.md#leed-measurement)

4. [Micro-ARPES/PED mode](./operating_microscope.md#micro-arpes-measurement)