تأثير الحقل المغناطيسي الأرضي على مسار الإلكترون داخل المحلل المرآتي الإسطواني

The CMA has a set of attractive properties different from other ones which are widely applied in AES, namely: high transmission, reasonable energy resolution and easy construction and operation. This paper aims to find geometrical dimensions of CMA using Laplace equation and studying the effect of geomagnetic field GF on the electron track within CMA. Then, we work to reduce this effect using three dimensions Fonzylane coils which diminish the components of GF and its effect on the electron track inside CMA in order to focus electrons on detector by situating the analyzer inside Fonzylane coils. Further, we expect an improvement of secondary electron spectrum emitted from the sample surface under study during appearance of the low energy peaks which did not clearly appeare before reduction of GF. Furthermore, we have shown a geomagnetic field component of , 25µT, resulting in a deflection of d = 52.3 µm for 50eV electron traveling through 10mm distance between sample and front part of CMA.