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Enhancements and Performance Analysis of 15-Degree Bend Magnet for Chopping Setup

This document discusses the performance of a 15-degree bend magnet and evaluates its compatibility with existing ITCU DS functionality at 350kV voltage levels. The system operates effectively at 4.2A and 0.7V, maintaining a temperature around 60°C, though improvements are suggested. Planned upgrades include winding new AWG16 coils for a potential 40% improvement and fabricating a longer fixture. Additionally, it details the chopping setup's configuration, transverse emittance, and the comparison of measurement data with MAFIA simulations for 1497 MHz chopper cavities.

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Enhancements and Performance Analysis of 15-Degree Bend Magnet for Chopping Setup

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  1. Comment on 15 deg bend magnet

  2. Comment on 15 deg bend magnet Existing ITCU DS should run fine (4.2A, 7V) at 350kV OK, although warm at about 60C. Next upgrade: wind new coils on existing fixture w/ AWG16 (~40% improvement). Next upgrade: fab longer fixture+coil. Fractional length of straight > total length of wire. Next upgrade: iron magnet

  3. Comment on Chopping Setup A1 A2 C1 C2 S1 S2 S3 S4 A1 and A2 define largest transverse emittance. S1 images A1 on chopping plane C1-S2-S3-C2: M11 M12 0 0 = M12 = 0 M22 = -1 M21 M22 x -x’ Focal length of S2 is the C1-S2 distance Choose C1 kick for displacement at chopper plane. Make S2-S3 distance as small as mechanically reasonable

  4. Comment on 1497 MHz chopper cavities TN-90-214, C. Yao – Comparison of measurement and MAFIA (agrees 50%) TN-90-234, G. Krafft – Includes relativistic correction, deflection equation, cavity parameters Typical parameters: (R/Q) ~ 12 ohms (Q0) ~ 14000 (Power @ 100eV) ~ 21 W Required Voltage ~ (Total Energy) * (Beta) * (deflection angle) Required Power ~ (Required Voltage)^2 / [ (R/Q) * (Q0) ] Calculate voltage, power for 350kV operation. Re-measure both cavities

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