Journal Article

PUBDB-2022-07693

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Unsupervised real-world knowledge extraction via disentangled variational autoencoders for photon diagnostics

Hartmann, G. (Corresponding author) ; Goetzke, G.DESY* ; Düsterer, S.XFEL.EU*DESY* ; Feuer-Forson, P. ; Lever, F. ; Meier, D. ; Möller, F. ; Vera Ramirez, L. ; Guehr, M.DESY* ; Tiedtke, K.XFEL.EU*DESY* ; Viefhaus, J. ; Braune, M.XFEL.EU*DESY*

2022
Macmillan Publishers Limited, part of Springer Nature [London]

This record in other databases:        

Please use a persistent id in citations: doi:10.1038/s41598-022-25249-4  doi:10.3204/PUBDB-2022-07693

Abstract: We present real-world data processing on measured electron time-of-flight data via neural networks.Specifically, the use of disentangled variational autoencoders on data from a diagnostic instrumentfor online wavelength monitoring at the free electron laser FLASH in Hamburg. Without a-prioriknowledge the network is able to find representations of single-shot FEL spectra, which have a lowsignal-to-noise ratio. This reveals, in a directly human-interpretable way, crucial information aboutthe photon properties. The central photon energy and the intensity as well as very detector-specificfeatures are identified. The network is also capable of data cleaning, i.e. denoising, as well as theremoval of artefacts. In the reconstruction, this allows for identification of signatures with very lowintensity which are hardly recognisable in the raw data. In this particular case, the network enhancesthe quality of the diagnostic analysis at FLASH. However, this unsupervised method also has thepotential to improve the analysis of other similar types of spectroscopy data.

---

Contributing Institute(s):

1. FLASH Photonen-Diagnose und Steuerungen (FS-FLASH-D)
2. FLASH Wissenschaftlicher Nutzerbetrieb (FS-FLASH-O)
3. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. 6G2 - FLASH (DESY) (POF4-6G2) (POF4-6G2)

Experiment(s):

1. FLASH: FEL user facility and Photon Diagnostics
2. FLASH2 Beamline FL24 (FLASH2)

Appears in the scientific report 2022

---

Database coverage:
; ; ; ; Article Processing Charges ; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; Fees ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection ; Zoological Record

---