Chapter 1 Introduction

Chapter 2 The g -Factor - Exploring Atomic Structure and Fundamental Constants

Chapter 3 Penning Trap Physics

Chapter 4 Towards the Measurement of the Larmor-to-Cyclotron Frequency Ratio

Chapter 5 Determination of the Atomic Mass of the Electron

Chapter 6 Probing the Isotope Shift: $$\varDelta g=g({}^{40}\mathrm{Ca}^{17+})-g(^{48}\mathrm{Ca}^{17+})$$ Δ g = g ( 40 Ca 17 + ) - g ( 48 Ca 17 + )