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Comprehensive Overview of DTC02 Lattice Design for Positron and Electron Acceleration at Cornell University

This document details the DTC02 lattice design, a collaborative global effort led by Cornell University, focusing on advanced accelerator physics. The lattice features a circumference of 3238.681 m with 710 m straight sections, integrating injection and extraction elements with shifted stacked rings for optimal beam line separation. It accommodates 60 wiggler units with realistic parameters and includes provisions for 16 RF cavities. The design also addresses harmonic number, phase trombone cells, and precise dynamic aperture requirements while ensuring efficient positron and electron handling during injection and extraction.

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Comprehensive Overview of DTC02 Lattice Design for Positron and Electron Acceleration at Cornell University

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  1. DTC02 – DR 3.238km Lattice Presenter Cornell University Global Design Effort

  2. DTC02 Layout • Circumference = 3238.681m • a Harmonic number =7022 • 710m straights • Injection and extraction elements in stacked rings shifted for ELTR/PLTR beam line separation requirements • ~ 6 phase trombone cells • Allow for 60 wigglers (allow for realistic wiggler parameters as opposed to sinusoidal or hard-edge models) • Wiggler period = 30cm • 14-poles a 2.1m active length • Bmax= 2.16T • Space for 16 RF cavities • Cryostats for upper and lower positron rings are interleaved • Spare space could also be used for 2nd harmonic cavities for bunch length control Central Region Joint Session

  3. Arc Cell - FDBDF Cell length = 10.93m Bend length = 3.0m 75 cells/arc Global Design Effort

  4. DTC02 Lattice Functions Arc Arc Inj-Ext Straight Wig-RF Straight Global Design Effort

  5. RF Cells Global Design Effort

  6. Extraction Straight Global Design Effort

  7. Injection straight Global Design Effort

  8. Circumference Changing Chicane Global Design Effort

  9. Wiggler 30cm wiggler params 14 poles 30cm period Wiggler length = 2.1m Cell length = 7.56 m 30 wiggler cells 2wiggler cells Global Design Effort

  10. DTC02 Parameters Global Design Effort

  11. RF The lattice can accommodate 16 RF cavities If we assume 12 then: Voltage/ cavity in 10Hz mode is 1.64 Power/coupler in 5Hz, high power mode is 300kW Global Design Effort

  12. Dynamic Aperture: 5 Hz Periodic type wiggler model, includes vertical focusing and cubic nonlinearity Global Design Effort

  13. Dynamic Aperture:10 Hz Periodic type wiggler model, includes vertical focusing and cubic nonlinearity Global Design Effort

  14. Magnet Count (Damping Ring) Global Design Effort

  15. Injection/Extraction Positrons – injection from left, extraction to right Electrons – injection from right, extraction to left Midpoint between injection and extraction kickers is 2.56m from center of straight Angle at entrance/exit of transfer lines with respect to storage ring straight = 240mrad Global Design Effort

  16. Injection/Extraction Injection and extraction lines are identical Angle with respect to damping ring straight = 240mrad Global Design Effort

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