TY  - CONF
AU  - Ramalingam, Rajinikumar
AU  - Bozhko, Yury
AU  - Barbanotti, Serena
AU  - Schnautz, Tobias
TI  - Heat loads measurements at the XFEL cold linac
JO  - IOP conference series / Materials science and engineering
VL  - 1240
IS  - 1
SN  - 1757-8981
CY  - London [u.a.]
PB  - Institute of Physics
M1  - PUBDB-2022-03898
SP  - 012123 -
PY  - 2022
AB  - Abstract. The European X-Ray Free Electron Laser (EuXFEL) at DESY is in operation sincethe beginning of 2017. The free electron laser is based on a superconducting linear acceleratorthat delivers electrons to the undulator section with beam energy up to 17.5 GeV. The linearaccelerator consists of 96 cryomodules; each 12 m long module is an assembly of8 superconducting cavities and one superconducting magnet. This paper focusses on themeasurement of the static and dynamic heat loads of the cryomodules assembled in the linac.Heat loads are an important parameter to evaluate the efficiency of the refrigerator system, thequality of the cryomodule assembly and installation and the accelerating cavity performances,being the dynamic heat loads proportional to the cavity quality factor (Q0, the ratio of the storedenergy to the dissipated energy). The paper describes at first the procedure to measure the staticheat load without beam energy and the dynamic heat loads at different beam energy levels. Themeasurement results are then summarized and compared with the XFEL design values.
T2  - Cryogenic Engineering Conference (CEC) 2021, 19-23 July 2021, Virtual Conference, USA
CY  - 19 Jul 2021 - 23 Jul 2021, Virtual Conference (USA)
Y2  - 19 Jul 2021 - 23 Jul 2021
M2  - Virtual Conference, USA
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.1088/1757-899X/1240/1/012123
UR  - https://bib-pubdb1.desy.de/record/480617
ER  -