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TUPB11 Cryogenics Monitoring and Control System for EMBL Facilities at PETRA III 167
  • M. Bueno, S. Fiedler, L. Kolwicz-Chodak, J. Meyer, U. Ristau
    EMBL, Hamburg, Germany
  At the integrated facility for structural biology of the EMBL at PETRA III on the DESY campus in Hamburg, several devices need cryogenic cooling with liquid nitrogen (LN2): cryo-coolers for the DCMs, cold gas stream units for cryo-crystallography (cryo-stream) at the beamlines and for an automatic crystal harvesting system, robotic sample mounting systems at the beamlines (MARVINs) and an additional one for sample transfer from the automatic crystal harvesting system. The cryo-coolers and phase separator are connected to the central LN2 supply operated by DESY. A local LN2 phase separator installed above one the beamlines is supplying the cryo-streams, the MARVIN systems and LN2 emergency reservoir. For the cryogenic devices local servers and clients exist that monitor and operate the corresponding sensors, actuators and provide the safety logic. In addition, the local cryo-clients are integrated in a cryogenics supervision client. The supervision client allows password protected access at a monitoring level, an operator and an expert level. At the monitoring level, it offers a fast overview of the status of all sub-systems at one glance. At the higher access levels, also the control of the cryogenic sub-systems is accessible. The application can be used from remote via a VPN connection, TeamViewer software or a web client (in preparation). Because of the heterogeneity of the cryogenic devices different protocols such as TINE, EtherCAT, ADS-OCX (BECKHOFF Automation) and EPICS for interfacing had to be applied.  
DOI • reference for this paper ※  
About • paper received ※ 29 July 2021       paper accepted ※ 27 September 2021       issue date ※ 03 November 2021  
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TUPC14 Copper Braid Heat Conductors for Sirius Cryogenic X-Ray Optics 207
  • F.R. Lena, G.V. Claudiano, J.C. Corsaletti, R.R. Geraldes, D.Y. Kakizaki, R.L. Parise, M. Saveri Silva, M.S. Souza, L.M. Volpe
    LNLS, Campinas, Brazil
  Funding: Ministry of Science, Technology and Innovation (MCTI)
The low emittance and high photon flux beam present at the 4th-generation Sirius synchrotron light source beamlines result in high energy densities and high heat loads at some specific X-ray optics such as monochromators and white beam mirrors. This challenges the design of such systems since the introduction of thermal stresses may lead to optical surface deformation and beam degradation. Thus, to keep the systems within acceptable deformations some of the optical elements are cryogenically cooled. However, this poses the requirements of decoupling the thermal sinks (cryostats) from the optics and the mechanisms to maintain their desired degrees of freedom for alignment and dynamic operation. In this context we present the development of low-stiffness copper-braid-based heat conductors, summarizing the motivation and main aspects regarding their fabrication and application at the beamlines.
poster icon Poster TUPC14 [1.783 MB]  
DOI • reference for this paper ※  
About • paper received ※ 28 July 2021       paper accepted ※ 19 October 2021       issue date ※ 30 October 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)