THPPP024
DESY, Hamburg, Germany
THPPP025
DESY, Hamburg, Germany
CAU, Kiel, Germany
MBI, Berlin, Germany
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THPPP024 |
Fast Setup Alignment of a Highly Mobile Experiment with a Raspberry Pi and a Beckhoff PLC and the Combination of the PLC to the DAQ. | |
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| The so-called Focus-Finder Setup of DESY uses a Beckhoff PLC to control the scanning motor during the measurement. While the measurement isrunning, the external trigger of a camera is used to save the timestamp and encoder value internally in the Beckhoff. Later, this data is used to synchronize the taken pictures with the corresponding encoder position. In our new enhanced setup, we use the Beckhoff PLC also for controlling all the additional motor axes of the experiment to align the scanning motion axis with the beam path. This is done by using a 7-inch touchscreen with an attached Raspberry Pi 3+ and pyqt5-based software to create the GUI. Together, this helps to reduce the setup and alignment time by factors. | ||
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Poster THPPP024 [2.057 MB] | |
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THPPP025 |
Commissioning of the Intermediate Focus Setup at P04 at DESY | |
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| The soft x-ray beamline P04 at PETRA III includes an experiment and beam-diagnostic station called Intermediate Focus (IF). The station holds an experimental station for soft x-ray scattering, as well as diagnostic and beam shaping equipment to propagate the beam further into the ASPHERE III setup of the University of Kiel (CAU). The IF station receives the beam over a pair of Kirkpatrick-Baez (KB) mirrors that produce 40 µm x 40 µm beam spot at the IF position. An additional set of KB mirrors inside the ASPHERE III instrument refocuses this spot into the ultimate focus. Among the beam shaping equipment, a set of interchangeable pinhole serve as a new source point. With a size between 5-100 µm they will produce a sub-micron beam size, which is less than 1 µm x 1 µm at the sample position. The IF station includes two features that will be presented: (a) A UHV switchyard that allows to bring either the scattering instrument or the beam shaper into the beam (collaboration with Max-Born-Institute Berlin). The switch between the setups works without breaking the vacuum. (b) The beam diagnostic and shaping assembly, including measurement and viewing components. | ||
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