ALS Superbend magnet system

Zbanik, J.; Wang, S.T.; Chen, J.Y.; deVries, G. J.; DeMarco, R.; Fahmie, M.; Geyer, A.; Green, M.A.; Harkins, J.; Henderson, T. F.; Hinkson, J.; Hoyer, E.; Krupnick, J.; Marks, S.; Ottens, F.; Paterson, J.A.; Pipersky, P.; Portmann, G.; Robin, D.; Schlueter, R.; Steier, C.; Taylor, C.; Wahrer, R.

doi:10.1109/77.920381

Cited by 15 publications

(11 citation statements)

References 4 publications

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“…In general, the physical size of the device or its mass is not a dominant factor in the selection of the cooler. The Superbend magnets, which have a cold mass of 1700 kg and a surface area of nearly 10 m 2 are cooled using a single 1.5 W cooler [15], [16]. A number of factors come into play when one is selecting the number of coolers that might be used to cool a single device.…”

Section: Cryogenic Cooling Options To Use a Cryo-cooler Or Not To Usementioning

confidence: 99%

Cryogenic refrigeration requirements for superconducting insertion devices in a light source

Green¹

2003

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This report discusses cryogenic cooling superconducting insertion devices for modern light sources. The introductory part of the report discusses the difference between wiggler and undulators and how the bore temperature may affect the performance of the magnets. The steps one would take to reduce the gap between the cold magnet pole are discussed.One section of the report is devoted to showing how one would calculate the heat that enters the device. Source of heat include, heat entering through the vacuum chamber, heating due to stray electrons and synchrotron radiation, heating due to image current on the bore, heat flow by conduction and radiation, and heat transfer into the cryostat through the magnet leads.A section of the report is devoted to cooling options such as small cryo-cooler and larger conventional helium refrigerators. This section contains a discussion as to when it is appropriate to use small coolers that do not have J-T circuits. Candidate small cryo-coolers are discussed in this section of the report. Cooling circuits for cooling with a conventional refrigerator are also discussed.A section of the report is devoted to vibration isolation and how this may affect how the cooling is attached to the device. Vibration isolation using straps is compared to vibration isolation using helium heat pipes. The vibration isolation of a conventional refrigeration system is also discussed.Finally, the cool down of an insertion device is discussed. The device can either be cooled down using liquid cryogenic nitrogen and liquid helium or by using the cooler used to keep the devices cold over the long haul.

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Section: Cryogenic Cooling Options To Use a Cryo-cooler Or Not To Usementioning

confidence: 99%

Cryogenic refrigeration requirements for superconducting insertion devices in a light source

Green¹

2003

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“…Setting the magnet current at 250 A, roughly in the middle of the normal operating range, measured values of 2 c and 3 c were used to position the magnet assemblies in order to cancel the quadrupole components. This method worked very well, as is illustrated in Table II, which shows the results of magnet #3 positioning.…”

Section: ) Transverse and Vertical Positionmentioning

confidence: 99%

“…Section II will summarize magnetic test results; Section III will summarize cryogenic test results. The design, requirements, and Superbend project have been discussed elsewhere [3], [4], [5]. Manuscript Figure 1 below, shows a picture of Superbend #1 installed around an alignment fixture on the test stand.…”

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confidence: 99%

ALS superbend magnet performance

Marks

Zbasnik

Byme

et al. 2002

IEEE Trans. Appl. Supercond.

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been engaged in the design, construction and testing of four superconducting dipoles (Superbends) that are installed in three arcs of the Advanced Light Source (ALS), with the fourth magnet as a spare. This represents a major upgrade to the ALS providing an enhanced flux and brightness at photon energies above 10 keV. In preparation for installation, an extensive set of tests and measurements have been conducted to characterize the magnetic and cryogenic performance of the Superbends and to fiducialize them for accurate placement in the ALS storage ring. The magnets are currently installed, and the storage ring is undergoing final commissioning. This paper will present the results of magnetic and cryogenic testing.

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“…The first of four Superbend magnets was successfully built by Wang NMR [7]. A picture of the first magnet cryostat system can be seen in First Article On August 24, the first Superbend magnet was successfully charged and ramped to full current without training.…”

Section: Preparation For Superbend Installationmentioning

confidence: 99%

Superbend project at the Advanced Light Source

Robin

Biocca²,

Brown³

et al.

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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To satisfy the demand for more high energy, high brightness x-ray sources at the Advanced Light Source (ALS), a plan is in place to replace three 1.3 Tesla normal conducting bending magnets with three 5 Tesla superconducting magnets (Superbends) in the year 2001. This will result in 12 new x-ray beam lines (four from each superbend) for users. The Superbend sources will be an order of magnitude higher in x-ray brightness and flux at 12 keV than the conventional 1.3 Tesla bending magnets. The Superbend project is a major upgrade to the ALS where the 3 superconducting magnets will be an integral part of the machine lattice. In this paper we discuss the current status of the Superbend projectas well as precomissioning studies prior to the 2001 installation for users.

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ALS Superbend magnet system

Cited by 15 publications

References 4 publications

Cryogenic refrigeration requirements for superconducting insertion devices in a light source

Cryogenic refrigeration requirements for superconducting insertion devices in a light source

ALS superbend magnet performance

Superbend project at the Advanced Light Source

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