We are delighted to announce that, thanks to a highly successful collaboration with Professor Jacek Kołodziej and Dr. Natalia Olszowska, supervisors of the URANOS beamline at the Solaris Synchrotron, we have gained direct access to a light beam in the hydrogen Lyman-alpha line range (around 10 eV). This access is the result of a significant modification made to the vacuum and optical path of the URANOS beamline. The light beam, with its high intensity, good collimation, and broad spectral width, will enable precise studies of the parameters of the gas absorption module, which is the core of the HYADES satellite payload. In particular, we will be able to investigate the dissociation efficiency of hydrogen and deuterium in the absorption cell, spatial absorbance maps, as well as the performance of the system used to broaden the hydrogen absorption line. 

We are grateful to Professor Piotr Cyganik and Ms. Daria Cegiełka for their assistance in preparing the EUV mirror for the URANOS beamline. 

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