Journal Article

PUBDB-2019-05093

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Operation of X-ray gas monitors at the European XFEL

Maltezopoulos, T. (Corresponding author)XFEL.EU* ; Dietrich, F. ; Freund, W. ; Jastrow, U. F.DESY* ; Koch, A. ; Laksman, J. ; Liu, J. ; Planas, M.XFEL.EU* ; Sorokin, A. A.DESY* ; Tiedtke, K.DESY* ; Grünert, J.XFEL.EU*

2019
Wiley-Blackwell [S.l.]

This record in other databases:        

Please use a persistent id in citations: doi:10.1107/S1600577519003795  doi:10.3204/PUBDB-2019-05093

Abstract: X-ray gas monitors (XGMs) are operated at the European XFEL for non-invasive single-shot pulse energy measurements and average beam position monitoring. They are used for tuning and maintaining the self-amplified spontaneous emission (SASE) operation and for sorting single-shot experimental data according to the pulse-resolved energy monitor data. The XGMs were developed at DESY based on the specific requirements for the European XFEL. In total, six XGM units are continuously in operation. Here, the main principle and experimental setup of an XGM are summarized, and the locations of the six XGMs at the facility are shown. Pulse energy measurements at 0.134 nm wavelength are presented, exceeding 1 mJ obtained with an absolute measurement uncertainty of 7–10%; correlations between different XGMs are shown, from which a SASE1 beamline transmission of 97% is deduced. Additionally, simultaneous position measurements close to the undulator and at the end of the tunnel are shown, along with the correlation of beam position data simultaneously acquired by an XGM and an imager.

Note: (c) International Union of Crystallography

---

Contributing Institute(s):

1. European XFEL Projekt Team (Eur.XFEL)
2. FLASH Photonen-Diagnose und Steuerungen (FS-FLASH-D)

Research Program(s):

1. 6211 - Extreme States of Matter: From Cold Ions to Hot Plasmas (POF3-621) (POF3-621)
2. 6G13 - XFEL (POF3-622) (POF3-622)

Experiment(s):

1. Facility (machine) XFEL

Appears in the scientific report 2019

---

Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; PubMed Central ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

---