Since a 6 MeV electron linear accelerator was installed in Nagoya Government Industrial Research Institute, measurement of energy spectra of electron beams generated by the accelerator became necessary, and an adequate spectrometer has been developed. The spectrometer has the following specification:
1. Electron beam is resolved in homogeneous magnetic field.
2. Deflection angle is 90° (the half of semicircular system)
3. Faraday cup and carefully designed pre-amplifier is used for detection.
4. For monitoring, the spectrum is indicated by a cathode-ray oscilloscope, and for recording, an X-Y recorder is used. The sweep time of the former is 4 sec. and that of the latter is 2min.
5. The window and the in-put slit are cooled by water to protect from being damaged by the transmission of high power incident beam.
6. Since the electron beam is radiated pulsatively, some filter circuits are provided in the amplifier of the detection system.
7. This spectrometer is available in the range of about 2_??_10 MeV with discriminable resolu- tion of about 1%.
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