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Advanced Photocathode System for Helicity Control in Electron Beam Applications

This advanced system incorporates a rotatable GaAs photocathode, a high-voltage supply, and a sophisticated helicity fiber generator to ensure precise control of the helicity state in electron beams. It features cutting-edge components such as a Delayed Helicity Fiber, V-Wien and H-Wien filters, and a variety of feedback systems (charge and position) to maintain optimal performance. With integrated Pockels cells and powerful solenoids, this setup is designed for high-energy applications up to 5 MeV, ensuring accurate control and measurement of electron beam properties.

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Advanced Photocathode System for Helicity Control in Electron Beam Applications

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  1. Rotatable GaAs Photocathode Attenuator IA LP HWP LP PC WP LP Shutter Helicity Fiber Helicity Generator 15° Dipole HV Supply (0 – 90 V) nHelicity Fiber Vacuum Window Delayed Helicity Fiber T-Settle Fiber Hall RHWP Charge Feedback (IA) V-Wien Filter Target Spin Solenoids DAQ BCM Charge Feedback (PITA) H-Wien Filter BPMs Position Feedback Pockels Cell HV Supply (0 – 4 kV) IHWP CEBAF 5 MeV Helicity Magnets PZT Mirror Electron Beam

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