✍ Scribed by M. Barranco-Luque; S. Claudet; W.K. Erdt; P.K. Frandsen; Ph. Gayet; D. Güsewell; K.P. Hoffmann; J. Schmid; N. Solheim; G. Winkler; C. Wyss
No coin nor oath required. For personal study only.
The cryogenics for the LEP200 project covers the liquid helium bath cooling requirements of about 200 superconducting RF acceleration cavities tobe installed in the ring tunnel of CERN's electron-positron collider LEP. It includes two cryoplants of 6 kW refrigeration capacity, four of 12 kW, about 2.6 km of transfer lines with actively cooled, flexible screens,, and a helium inventory of about 80'000 Nm,~. At present all equipment is ordered; about one quarter is installed and operational. Special design features needed to cope with space problems in the existing pit/tunnel system are presented and first operational experience from runnin., g.the two 6 kW plants with 550 m of transfer lines and a number of cavities ~s reported.
📜 SIMILAR VOLUMES
The superconducting magnets of the CERN Large Hadron Collider (LHC) project must be kept at their operating temperature of 1.9 K all around the 26.7 km circumference of the machine ring. For this purpose, they are immersed in static baths of pressurized helium II, acting as heat transport medium to