Heling, S.; Anders, W.; Heinrich, J.; Hellwig, A.; Janke, K.; Rotterdam, S.: Cryogenic Infrastructure at BESSY II – Current Installations and Future Developments. In: Peter Michel ... [Ed.] : SRF2019, Proceedings of the 19th International Conference on RF Superconductivity, Dresden, GermanyGeneve: JaCoW, 2019. - ISBN 978-3-95450-211-0, p. MOP035/131-135
http://accelconf.web.cern.ch/AccelConf/srf2019/papers/mop035.pdf
Open Access Version
Abstract:
In Berlin-Adlershof the Helmholtz-Zentrum Berlin (HZB) is operating the synchrotron radiation source BESSY II. Two superconducting wave-length shifters magnets are built-in the storage ring of BESSY II which are cooled with liquid helium. Additionally several test fa-cilities for superconducting cavities are operated at HZB needing helium at 1.8 K. The required helium is supplied by two helium liquefiers. Parallel to operation of the existing facilities the bER-LinPro project will qualify as test facility for ERL science and technology. In order to guarantee the required supply with helium at different temperature levels one of the ex-isting helium liquefiers has been relocated to the new ac-celerator building and the existing cryogenic infrastructure has been upgraded with a new 10,000 L dewar, three valve boxes, a cold compressor box, warm pumps and a 80 K helium system. This paper specifies the setup of the above described he-lium cryoplants in detail and gives insight into the chal-lenges of developments. The paper concludes with an out-look of the upcoming developments of the cryogenic infra-structure at HZB.