Theoretical analysis of achromatic deflectors

Igor A. Petrov; T. Y. Fishkova; L. P. Ovsyannikova

doi:10.1117/12.451280

21 December 2001 Theoretical analysis of achromatic deflectors

Igor A. Petrov, T. Y. Fishkova, L. P. Ovsyannikova

Proceedings Volume 4510, Charged Particle Detection, Diagnostics, and Imaging; (2001) https://doi.org/10.1117/12.451280
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

An electromagnetic system with matching centers of deflection in any arbitrary direction of charged particle beam is proposed. Analytical expressions for electrostatic and magnetic scalar potential distributions for such systems made of four, six and eight electrodes-poles were obtained in two-dimensional approximation. Values of feeding potential needed for improvement of field homogeneity were found for the six electrode-pole systems. Conditions of the first order achromatism for the deflecting, focusing and correcting systems with the transversal fields have been written in general form. Edge field distribution along optical axis has been calculated numerically for finite length deflectors and empirical formula approximating this distribution has been derived. Beam central trajectory parameters were calculated for electrostatic, magnetic and for systems with common ratio of the electrostatic and magnetic components, providing achromatic deflection in small work region. Other ratios of these components providing expansion of region of the achromatic deflection up to 20⁰-25⁰ and high er degree of the linear deflection were found. Advantages of the proposed deflectors are described.

Citation Download Citation

Igor A. Petrov, T. Y. Fishkova, and L. P. Ovsyannikova "Theoretical analysis of achromatic deflectors", Proc. SPIE 4510, Charged Particle Detection, Diagnostics, and Imaging, (21 December 2001); https://doi.org/10.1117/12.451280

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available