Study of radial motion phase advance during motion excitations in a\n Penning trap and accuracy of JYFLTRAP mass spectrometer

Abstract

Phase-imaging ion-cyclotron-resonance technique has been implemented at the\nPenning-trap mass spectrometer JYFLTRAP and is routinely employed for mass\nmeasurements of stable and short-lived nuclides produced at IGISOL facility.\nSystematic uncertainties that impose limitations on the accuracy of\nmeasurements are discussed. It was found out that the phase evolution of the\nradial motion of ions in a Penning trap during the application of\nradio-frequency fields leads to a systematic cyclotron frequency shift when\nmore than one ion species is present in the trap during the cyclotron frequency\nmeasurement. An analytic expression was derived to correctly account for the\nshift. Cross-reference mass measurements with carbon-cluster ions have been\nperformed providing the mass-dependent and residual uncertainties.\n