By Rainer Meinke Carl Goodzeit Penny Ball; United States. Dept. of Energy. Office of Energy Research.; United States. Dept. of Energy. Chicago Operations Office.; United States. Dept. of Energy. Office of Scientific and Technical Information.; Advanced mag
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030 Figure 5. Average beam current density as a function of aperture for a double-helix quadrupole. This double-helix design has a larger optimal aperture and a lower beam current density than the racetrack. In neither case is there a very strong dependence on aperture so that other considerations may ultimately play important roles in determining the true optimal aperture, for example, the number of beams and fabrication costs. Consider first the number of beams. Figure 6 shows a schematic diagram of an array containing 32 beams.
SUMMARY We have presel)ted the results of a magnetic analysis of flat coil and double-helix quadrupole examples that are considered for use in a Phase II SBIR quad array proposal. These examples produce a gradient of about 95 Tim as a single magnet and would produce about 110 Tim in an array based on a 26% enhancement. Both of these designs appear to use nearly the same amount of superconductor. It is estimated that the DHQ uses about 6% more superconductor (kg/m) that the flat coil design. However, the DHQ uses a round cable that is easier to manufacture and thus, less costly that the flat Rutherford style cable required for the flat coil design.
0 kAJmm2 in the future. 4 T. 6 T. 6 T. 1 T. 030 Figure 9. Average beam current as a function of aperture for a quadrupole with an elliptical beam pipe including effects of emittance. 1, there are large differences in opinion concerning the proper choice of the misalignment parameter 5. 5 cm. Figure 10 gives the results, together with the case shown in Figure 9. m Figure 10. A comparison of two cases with different alignment parameters. 0 mm. As expected, the optimal aperture is smaller in the case with small 5.