1. Electron detection performance of diamond avalanche diode.
- Author
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Morishita, Hideo, Ohshima, Takashi, Hatano, Michio, Iwakaji, Yoko, Maida, Osamu, and Ito, Toshimichi
- Subjects
PARTICLES (Nuclear physics) ,SCANNING electron microscopes ,ELECTROMAGNETIC fields ,SEMICONDUCTOR diodes ,FIELD theory (Physics) ,ELECTRIC fields ,DETECTORS - Abstract
The authors evaluated the electron detection performance of a diamond avalanche diode (DAD) detector. In the electrode region, the gain was uniformly about 10
3 with little noise. Meanwhile, an avalanche multiplication occurred locally. In the avalanche region, a total gain of 5×104 was obtained. In some regions where the electric field is regarded to be intensified, the avalanche multiplication gain was estimated to be approximately 100-300, and the signal-to-noise ratio (S/N) was nearly equal to 1. The DAD can be applied to an electron detector for a scanning electron microscope due to its high gain and small dark current. However, it is necessary to improve the S/N and homogenize the gain to use the DAD detector as an electron detector. [ABSTRACT FROM AUTHOR]- Published
- 2010
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