Superbend project at the Advanced Light Source

Abstract

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.

ALS superbend magnet performance

“…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.…”

Superbend upgrade at the Advanced Light Source

“…The ALS lattice is built up of twelve sectors. As part of the Superbend project 3 of the 12 sectors in the the storage ring lattice were modified by replacing 3 of the 36, 1.3 Tesla, normal conducting, 10 degree, bending magnets with three, 5 Tesla, superconducting, 10 degree, bending magnets (Superbends) [10,14]. The Superbend reaches a peak magnetic field of 5.7 Tesla and is about 5 Tesla at the locations of the four beamlines.…”

“…In particular the goal of a cost effective yet reliable system strongly impacted the design of the cryogenic systems [10,[14][15][16][17]. Also each of the subsystems and finally the complete systems were thoroughly tested prior to the Superbend shutdown.…”

“…In the first shutdown (which occurred in March 2000) all major components of the project, excluding the actual Superbend magnets were installed [14]. In the second shutdown (which began in August 2001) the Superbends were installed and commissioned [15].…”

Status and development of the ALS

“…Over the last couple of years 20 new beamline projects are currently either operational (7), being commissioned (4), under construction (7), or being designed (2). In the near future there is a plan to replace 3 of the ALS 1.3 Tesla normal conducting magnets with 3 superconducting magnets (Superbends) [1]. The Superbends are located in sectors 4, 8, and 12 as shown in Fig.…”