Conceptual Design Studies for HE II Cooled Low Beta Quad IR Magnets
1994
This paper discusses the results of the Cryostat Design Group’s effort on the Conceptual Studies of the Low Beta Quad Magnets (LBQ) cooled by superfluid Helium (He II). The conclusion of this study is that the “adapted CERN” He II cooling design does present a satisfactory system for cooling the LBQ magnet interaction region (IR) radiation heat loads; however, for the increased luminosity heat load some research on the cable insulator is required to achieve an effective thermal connection between the outer coil and the He II bath. The LBQ magnets are the final four magnets on either side of the IR detector. These four magnets are named Ql, Q2A, Q2B, and Q3, reaching outward from the interaction point (IP). All magnets have a 50-mm magnet bore and produce a gradient of 193 T/m. Magnetic lengths were all considered to be 15 meters for the purposes of this study.
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