Requirement Details
Electron Ion Collider
P-ESR-MAG-D2.46
Requirement details, history, relationships and interfaces associated with requirement P-ESR-MAG-D2.46
CURRENT RECORD- ARCHIVE RECORDS
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| Record Date: 10/10/2024 14:48 | |||
| Identifier: | P-ESR-MAG-D2.46 | WBS: | 6.04.02.01 |
| Date Modified: | TBD: | FALSE | |
| Status Date: | Status: | Reviewed | |
| Description: | The magnet design and verification process shall ensure the final magnet will meet the reliability needs of the EIC over it planned operational life of >20 Years. | ||
| Comments: | |||
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| F-ESR-ARC.1 | The EIC ESR lattice arc magnet structure shall contain an array of regular FODO cells |
| F-ESR-ARC.2 | The EIC ESR lattice arc magnet structure shall consists of a quadrupole, a sextupole, a bending section, and a dipole corrector in each arc half-cell. |
| F-ESR-ARC.3 | The EIC ESR lattice arc magnet structure shall contain drift spaces between the half cells all of which may beslightly different in each individual arc. To account for small differences in the required average bending radii at the different arc locations. |
| F-ESR-ARC.4 | The bending sections shall contain three individual dipole magnets, referred to as “super-bendsâ€. |
| F-ESR-ARC.5 | The super-bends shall generate additional synchrotron radiation damping to support a large beam-beam parameter of 0.1 and to create the required horizontal design emittance [5.9] when the ESR is operated at energies below 10 GeV. |
| F-ESR-ARC.6 | The polarity of the center bending magnet shall be capable of being wired in reverse to control the beam emittance and to damp the beam. The polarity will be dictated by the beam energy. |
| F-ESR-CONT.1 | The ESR control system shall facilitate all ESR global control requirements.  |
| F-ESR-MAG.1 | The magnets shall meet the requirements defined by the physics lattice. |
| F-ESR-MAG.2 | The magnets shall have the required field quality to meet the operational needs. |
| F-ESR-MAG.4 | The “super-bends†in the ARC sections shall consist of two long dipoles on either end of a short dipole. |
| F-ESR-MAG.5 | The good field region of the dipoles shall extend over a horizontal range of at least 4 centimeters in the radial direction, for all operational beam energies from 5 to 18 GeV. This will take into account the orbit changes due to the reverse bends. Confirm the 4cm with Daniel and Scott |
| F-ESR-MAG.12 | The quadrupoles in the straight sections IR10, IR12, IR2, and IR4 and in the transition from the arc to the straight section structure shall be wired to provide the optimized betatron phase advance across each straight section, as required for dynamic aperture optimization. |
| F-ESR-MAG.14 | The sextupole power supply scheme shall be laid out such that the sextupole family structure can be configured for both the 60 and the 90 degree lattice along with a small number of individually powered sextupoles in the transition regions between arcs and straight sections with minimal effort, cost and minimizing any risk of error. |
| F-ESR-STRAIGHT.3 | There shall be matching sections at the ends of each of the straight sections to compensate for the different FODO cell lengths wrt the arc FODO cells imposed by geometric constraints. |
| F-ESR.1 | The ESR lattice shall provide a minimum dynamic aperture of 10 sigma w.r.t Gaussian electron beam distribution in all three dimensions, horizontal, vertical, and longitudinal. With the vertical emittance being half the horizontal design emittance. |
| F-ESR.2 | The minimum dynamic aperture shall be achieved in two optics configurations (60 and 90 degrees betatron phase advance per FODO cell) at all operational beam energies as per [5.9], and with one and with two low-beta insertions. |
| F-ESR.3 | The ESR shall support two low-beta insertions (colliding beam interaction regions) at IRs 6 and 8. |
| F-ESR.4 | The ESR alignment requirements are established by dynamic aperture and polarization tracking. The ESR RMS alignment tolerances shall be such that all the beam parameter listed in [5.9] can be satisfied. |
| F-ESR.5 | The ESR shall reach an availability consistent with the overall availability of the entire EIC as specified in [5.9]. |
| F-IR.9 | The IR shall be designed so that the electron and hadron beams have the same cross-sectional area and maximum overlap to achieve the high luminosities required in [5.8]. |
| F-IR.8 | The IR shall be designed to ensure the hadron and electron beam collisions at the IP meet all the performance requirements set forth in [5.8]. |
| F-IR.11 | The IR operational uptime shall match the operational uptime requirements of the EIC. |
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