Speaker
Description
Brookhaven National Laboratory (BNL) was chosen to host the international Electron-Ion Collider (EIC), which will collide high energy and highly polarized hadron and electron beams with a center of mass energy up to 140 GeV. The Interaction Region (IR) requires several large aperture, relatively high field superconducting dipole and quadrupole magnets, some of which are very closely spaced.
A value engineering effort is underway as part of the EIC Project to construct and test a Direct Wind magnet (coil comprised of NbTi conductor deposited directly onto a support tube, in this instance tapered, and secured mechanically against Lorentz forces afterwards) to replace two Rutherford cable collared magnets. This magnet exceeds the combination of aperture, number of coil layers, and magnetic field, as compared to existing accelerator and R&D Direct Wind magnets to date. Furthermore, construction has been completed using a newly commissioned winding machine, upgraded in anticipation of upcoming EIC production coil fabrication. Construction issues, lessons learned, and results shall be discussed, including the planned and accomplished corrections to multipoles made in successive coil layers based on warm magnetic measurements of preceding layers. Cryogenic magnet cold test results including maximum gradient and final field uniformity achieved will also be reported.
Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the US Department of Energy.
