Experimental Study on Electron Beam Energy Recovery System Using a Laser-Heated Electron Gun and a Multistage Electron Collector for Highly Efficient Beam Application
Abstract
An experiment on electron beam energy recovery systems has been performed using a laser-heated electron gun and a multistage electron collector. Modeling of the laser heating indicates that the cathode temperature is proportional to the one-fourth power of laser power. The energy recovery efficiency of 99.8% of the designed collector is calculated using a computer code with a beam current of about 10 mA and -75 keV. In the first phase of the recovery experiment, potentials of the collector electrodes are provided through a voltage divider of several hundred megaohms. In order to overcome the drawback of voltage-divider resistance, two high-voltage power supplies are provided in the second phase of the experiment, and charge and energy recovery efficiencies are measured.
- Publication:
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Japanese Journal of Applied Physics
- Pub Date:
- January 1999
- DOI:
- 10.1143/JJAP.38.279
- Bibcode:
- 1999JaJAP..38..279R