Conceptual design studies for a He II cooled Low Beta Quad IR Magnets
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 H 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. 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. Radiation from the proton-proton collisions results in a significant heat deposition on the LBQs which is most severe for Ql and least severe for Q2 and Q3. This is reduced with a 25-mm aperature, 3 meter long steel collimator installed upstream of Q1. Total heat to be removed from Ql is 47 watts at the baseline luminosity which presents the most severe design challenge.,V Maximum local heat deposition is 0.25 mw/g. The average value for the inner coil compared to the worst 2.5-meter length is 1.01 w/m average compared to 2.24 w/m maximum. The thermal model results were generated for both the maximum heat loads and the average heat load. The design loads for the 10[sup 34] luminosity design can be obtained by multiplying the above values by ten. The assumption has been made that a cooling collimator is installed inside the beam tube along the entire length of the magnets to absorb one-half of the total heat load for the increased luminosity design.
- Research Organization:
- Superconducting Super Collider Lab., Dallas, TX (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC35-89ER40486
- OSTI ID:
- 6481165
- Report Number(s):
- SSCL-Preprint-285; CONF-930537-51; ON: DE93014248
- Resource Relation:
- Conference: 5. annual international industrial symposium on the Super Collider and exhibition, San Francisco, CA (United States), 6-8 May 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTING MAGNETS
DESIGN
SUPERCONDUCTING SUPER COLLIDER
BEAM LUMINOSITY
CRYOGENICS
CRYOSTATS
HEAT EXCHANGERS
HEAT TRANSFER
HELIUM
QUADRUPOLES
CONTROL EQUIPMENT
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ELEMENTS
ENERGY TRANSFER
EQUIPMENT
FLUIDS
GASES
MAGNETS
MULTIPOLES
NONMETALS
RARE GASES
STORAGE RINGS
SUPERCONDUCTING DEVICES
THERMOSTATS
430303* - Particle Accelerators- Experimental Facilities & Equipment