Speaker
Alexey Koveshnikov
(TRIUMF)
Description
The Advanced Rare IsotopE Laboratory (ARIEL) is a major expansion of the Isotope Separation and Acceleration (ISAC) facility at TRIUMF. The key part of the ARIEL project is a superconducting radiofrequency (SRF) electron linear accelerator (E linac). E-linac helium cryogenic system was designed to meet the ARIEL specifications. The HELIAL LL helium liquefier by Air Liquide Advanced Technologies supplies 4 K liquid helium (LHe) to cryomodules via LHe distribution system. The cryomodules have a top-loaded design. The 4 K – 2 K temperature conversion is achieved by a counter flow heat exchanger and a JT-valve installed onboard of each cryomodule. The temperature in 2K volume of cryomodules is controlled by the pressure control in sub-atmospheric line. Sub-atmospheric helium is warmed up in a custom-designed heat exchanger and after passing sub-atmospheric pumps goes to the helium compressor suction line. LN2 system supplies liquid nitrogen to the liquefier, 80K shielding of the cryomodules and LHe distribution system, as well as to freeze-out helium purifier.
The installation of the E-linac cryogenic system components started in February 2013 while the corresponding subsystems tests started in November 2013. This paper describes the E linac cryogenic system components integration and presents the results of the acceptance tests and commissioning activities performed at TRIUMF since November 2013.
Primary author
Alexey Koveshnikov
(TRIUMF)
Co-authors
Mr
Dimo Yosifov
(TRIUMF)
Mr
Geoff Hodgson
(TRIUMF)
Dr
Iouri Bylinskii
(TRIUMF)
Mr
Ruslan Nagimov
(TRIUMF)
Dr
Shane Koscielniak
(TRIUMF)
