Design, Construction and Performance of Superconducting Magnet Support Posts for the Large Hadron Collider

Blin, M.; Danielsson, H. O.; Evans, B. Fred; Mathieu, Marie-Christiane

doi:10.1007/978-1-4615-2522-6_82

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…Since the 1980s, based on the continuing international collaboration through projects of HERA, SSC, LHC, and ILC (TESLA, XFEL), post type supports between 300 K and 2 K were successfully developed and utilized in large superconductivity projects [20]. The support post minimizes heat leak and is capable of withstanding the axial and radial loads.…”

Section: Support System For Long Cylindrical Heavy Weight Cold Massmentioning

confidence: 99%

“…The measured heat leaks with a column thickness of 6 mm fiberglass are: 300 K/80 K ~ 7 W, 80 K/5 K ~ 1 W, 5 K/1.8 K ~0.1 W. In fact, the 6 mm thickness was oversized and 4 mm is the final thickness in the LHC specification. Figure 4 shows a schematic of the LHC magnet post and how the post supports the cold mass [20].…”

Section: Support System For Long Cylindrical Heavy Weight Cold Massmentioning

confidence: 99%

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Developments in advanced and energy saving thermal isolations for cryogenic applications

Shu

Demko

Fesmire

2015

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The cooling power consumption in large scale superconducting systems is huge and cryogenic devices used in space applications often require an extremely long cryogen holding time. To economically maintain the device at its operating temperature and minimize the refrigeration losses, high performance of thermal isolation is essential. The radiation from warm surrounding surfaces and conducting heat leaks through supports and penetrations are the dominant heat loads to the cold mass under vacuum condition. The advanced developments in various cryogenic applications to successfully reduce the heat loads through radiation and conduction are briefly and systematically discussed and evaluated in this review paper. These include: (1) thermal Insulation for different applications (foams, perlites, glass bubbles, aerogel and MLI), (2) sophisticated low-heat-leak support (cryogenic tension straps, trolley bars and posts with dedicated thermal intercepts), and (3) novel cryogenic heat switches. IntroductionKeeping temperatures of a large scale cold mass within a few kelvin of absolute zero is a great challenge. Many superconductivity projects have cold masses kilometers in length or huge complex machines, such as CERN, RHIC, Fermilab, CEBAF, DESY and ITER [1][2][3]. The high Tc superconducting applications and other usages with LO 2 , LN 2 and LH 2 present different requirements.For example, requirements for the LHC magnets distributed in a tunnel of 27 km can be summarized in terms of heat load per meter as follows [3]: total leak from 290 K vacuum vessel to 80 K shield is 4.26 W (3.76 W by MLI, 0.68 W by support) and from the 80 K shield to the cold mass is 0.18 W (0.09 W by MLI and 0.09 W by supports). Obviously, the design and implementation of high thermal efficient supports is about equally crucial to the contribution of high performance MLI.This review paper will cover energy saving cryogenic transfer lines and then discuss the sophisticated support structures in large magnets, SRF cavities, and detectors. The merit of traditional powder type insulation and newly developed aerogels insulation are compared [4]. The performance, materials and design combinations of various super-insulations or multilayer insulation (MLI) are summarized. Special attention is then given to the tests and improvements of MLI with penetrations [5]. Finally, novel cryogenic switches for thermal management are also mentioned.

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Section: Support System For Long Cylindrical Heavy Weight Cold Massmentioning

confidence: 99%

Section: Support System For Long Cylindrical Heavy Weight Cold Massmentioning

confidence: 99%

Developments in advanced and energy saving thermal isolations for cryogenic applications

Shu

Demko

Fesmire

2015

IOP Conf. Ser.: Mater. Sci. Eng.

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Measurement and Analysis of Thermal Performance of LHC Prototype Cryostats

Benda

Dufay

Ferlin

et al. 1996

A Cryogenic Engineering Conference Publication

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Twenty-Three Kilometres of Superfluid Helium Cryostats for the Superconducting Magnets of the Large Hadron Collider (LHC)

Lebrun¹

2016

Cryostat Design

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Design, Construction and Performance of Superconducting Magnet Support Posts for the Large Hadron Collider

Cited by 5 publications

References 4 publications

Developments in advanced and energy saving thermal isolations for cryogenic applications

Developments in advanced and energy saving thermal isolations for cryogenic applications

Measurement and Analysis of Thermal Performance of LHC Prototype Cryostats

Twenty-Three Kilometres of Superfluid Helium Cryostats for the Superconducting Magnets of the Large Hadron Collider (LHC)

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