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Cathode, Laser and Injector Pose Significant Challenge for ERL based EIC: ~ 50 mA from injector

Development of a laser system for driving the photocathode of the polarized electron source for the EIC. Cathode, Laser and Injector Pose Significant Challenge for ERL based EIC: ~ 50 mA from injector State of the art is 1 mA. Research needed in development of cathode, laser and injector

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Cathode, Laser and Injector Pose Significant Challenge for ERL based EIC: ~ 50 mA from injector

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  1. Development of a laser system for driving the photocathode of the polarized electron source for the EIC

  2. Cathode, Laser and Injector Pose Significant Challenge for ERL based EIC: • ~ 50 mA from injector • State of the art is 1 mA • Research needed in development of cathode, laser and injector • LDRD for New injector design: multi cathode to reduce load on a single cathode • LDRD for laser development 2W/mA (780 nm, 0.1% QE) Two complimentary proposals, each stand alone, but mutually highly beneficial

  3. No Commercial Laser to meet the need! LDRD Research Project: • Three possible approaches: • Fiber oscillator  Fiber amplifier 2ћωto 780 nm • Ti:S Oscillator  Ti:S amplifier 780 nm • Diode oscillator  Power amplifier 780 nm All three approaches will be evaluated Best selected, built & test to drive up to 2 mA Expected Results Laser to drive one cathode of the multi cathode gun Laser system scalable to deliver full EIC electron beam

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