Specifications for the JLEIC IR Magnets

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Presentation transcript:

Specifications for the JLEIC IR Magnets V.S. Morozov on behalf of the JLEIC detector study group JLEIC Collaboration Meeting, JLab March 29-31, 2016 F. Lin

Detector Region Layout e- crab cavities ion crab cavities IP e- Compton polarimetry forward ion detection ions forward e- detection dispersion suppressor/ geometric match spectrometers Forward hadron spectrometer low-Q2 electron detection and Compton polarimeter p (top view in GEANT4) e ZDC

Interaction Region Ion IR magnets IP ions Quadrupoles: QFFB3_US, QFFB2_US, QFFB1_US, QFFB1, QFFB2, QFFB3 Spectrometer dipoles: SB1, SB2 SB1 IP QFFB2 QFFB1 QFFB3 SB1 QFFB1_US ions QFFB2_US QFFB3_US

IR Ion Magnet Parameters Assuming 100 GeV/c Parameters are determined primarily by detection requirements rather than beam dynamics Bottom-up study of multipole requirements in progress Note: parameters are still being fine-tune but no major changes Name Type Length [m] Good-field radius [cm] Inner radius [cm] Outer radius [cm] Min. beam separation [cm] Strength [T or T/m] Pole-tip field [T] QFFB3_US Quad [T/m] 1 3 4 12 36.0 -116 -4.6 QFFB2_US 1.5 26.5 149 6 QFFB1_US 1.2 2 10 18.0 -141 -4.2 SB1 Dipole [T] 17 24 25.0 -2 QFFB1 9 17.1 35.9 -88 -8 QFFB2 2.4 15.7 24.7 48.2 51 8 QFFB3 26.7 67.2 -35 -6 SB2 40 90 102 4.7

Interaction Region Electron IR magnets IP electrons Quadrupoles: QFFB4e, QFFB3e, QFFB2e, QFFB1e, QFFB1e_US, QFFB2e_US, QFFB3e_US QFFB1e_US IP QFFB1e QFFB3e_US QFFB3e electrons QFFB2e_US QFFB2e QFFB4e

IR Electron Magnet Parameters Assuming 10 GeV Parameters are determined primarily by beam size and available space Multipole tolerance study has not been done yet One has to consider effect of the solenoid fringe field Note: parameters are still being fine-tune but no major changes Name Type Length [m] Good-field radius [cm] Inner radius [cm] Outer radius [cm] Min. beam separation [cm] Strength [T/m] Pole-tip field [T] QFFB4e Quad 0.5 4 5 11 21 -3.1 -0.16 QFFB3e 0.58 15 47.9 2.39 QFFB2e 0.7 2 3 8 10.5 -57.7 -1.73 QFFB1e 0.4 1.2 6 24.4 0.49 QFFB1e_US 7 12 -43.9 -1.32 QFFB2e_US 10 16 45.5 2.28 QFFB3e_US 22 -16.4 -0.82