Mr
Denis HENRY
(ITER Organization)
25/09/2008, 13:30
The ITER (International Thermonuclear Experimental Reactor) cryogenic system is in its final design phase to be constructed at Cadarache, South of France. With a refrigeration capacity equivalent to 65 kW at 4.5 K distributed via complex and compact cryogenic distribution system it will represent the next large scale cryogenic installation to go into operation in the next decade.
The...
Mr
Hermann Herzog
(Linde Kryotechnik AG, c/o DESY Hamburg)
25/09/2008, 14:00
DESY has a long tradition on Cryogenics. Each of the three refrigerators of the HERA cryogenic plant, being used at the DESY Laboratory in Hamburg, Germany, has a cooling capacity of 6.5kW at 4.4K and 20kW at 40K-80K.Operating and maintenance was led by a mixed group of operators/experts and under LINDE KRYOTECHNIK AG supervision. We describe the cryogenic installations, how they operated and...
Mr
Dana Arenius
(Jefferson Laboratory)
25/09/2008, 14:30
OPERATION
As part of the planned Jefferson Laboratory’s electron accelerator (CEBAF) power upgrade, ten additional superconducting RF cryomodules will be added to its accelerator linacs. Although physically the same size as each of the original 40 linac cryomodules, each new cryomodule will have approximately 4 times the acceleration power. To support the new additional cryomodule heat loads generated...
Dr
Igor Sekachev
(TRIUMF, Canadian National Laboratory)
25/09/2008, 15:30
OPERATION
A modern helium refrigerator has replaced a 30-year old Philips cryogenerator on the 500 MeV cyclotron. Two ~11m long cryopanels are cooled down to 4.5K from the previous 17K, increasing pumping speed and improving reliability of the 90 m3 cyclotron tank vacuum system.
A 600 Watts helium refrigerator, supporting the ISAC Phase-I SC-linac, is now in routine operation. The Phase-II SC-linac...
Mrs
Valérie LAMAISON
(CEA Cadarache)
25/09/2008, 16:00
OPERATION
Performing high quality plasma requires “clean” vacuum vessel obtained by frequent bakings. Baking consists of heating the vacuum vessel to 473K for several days. This operation requests a particular operational mode of the cryogenic system. Because of the increase of radiation heat loads on thermal shields, the helium mass flow in 80K cryogenic circuits should increase of 50%.
To avoid an...
Mr
Dana Arenius
(Jefferson Laboratory), Mr
Kelly Dixon
(Jefferson Laboratory)
25/09/2008, 16:30
OPERATION
A good portion of the typical helium refrigeration system inefficiency is attributed to the warm helium compressor subsystem. Much of the current helium refrigeration system efficiency improvement R+D centers on the refrigerator components which extract the energy from the gas but very little is research and development has gone into the portion of the system in which the energy is being...
Ms
Sophie Gardette
(CERN)
25/09/2008, 17:00
OPERATION
Presentation of the visits of Friday 26th September
