CERN Accelerating science

Article
Title	Commissioning of the helium cryogenic system for the HIE- ISOLDE accelerator upgrade at CERN
Author(s)	Delruelle, N (CERN) ; Inglese, V (CERN) ; Leclercq, Y (CERN) ; Pirotte, O (CERN) ; Williams, L (CERN)
Publication	2015
In:	IOP Conf. Ser. Mater. Sci. Eng. 101 (2015) 012070
In:	Advances in Cryogenic Engineering: Cryogenic Engineering Conference, Tucson, AZ, USA, 28 Jun - 2 Jul 2015, pp.012070
DOI	10.1088/1757-899X/101/1/012070
Subject category	Engineering
Accelerator/Facility, Experiment	CERN ISOLDE
Abstract	The High Intensity and Energy ISOLDE (HIE-ISOLDE) project is a major upgrade of the existing ISOLDE and REX-ISOLDE facilities at CERN. The most significant improvement will come from replacing the existing REX accelerating structure by a superconducting linear accelerator (SC linac) composed ultimately of six cryo-modules installed in series, each containing superconducting RF cavities and solenoids operated at 4.5 K. In order to provide the cooling capacity at all temperature levels between 300 K and 4.5 K for the six cryo-modules, an existing helium refrigerator, manufactured in 1986 and previously used to cool the ALEPH magnet during LEP operation from 1989 to 2000, has been refurbished, reinstalled and recommissioned in a dedicated building located next to the HIE-ISOLDE experimental hall. This helium refrigerator has been connected to a new cryogenic distribution line, consisting of a 30-meter long vacuum-insulated transfer line, a 2000-liter storage dewar and six interconnecting valve boxes, one for each cryo-module. This paper describes the whole cryogenic system and presents the commissioning results including the preliminary operation at 4.5 K of the first cryo- module in the experimental hall.
Copyright/License	publication: © 2015-2025 The Author(s) (License: CC-BY-3.0)

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