An improvement of isochronous mass spectrometry: Velocity measurements using two time-of-flight detectors

Abstract

Isochronous mass spectrometry (IMS) in storage rings is a powerful tool for mass measurements of exotic nuclei with very short half-lives down to several tens of microseconds, using a multicomponent secondary beam separated in-flight without cooling. However, the inevitable momentum spread of secondary ions limits the precision of nuclear masses determined by using IMS. Therefore, the momentum measurement in addition to the revolution period of stored ions is crucial to reduce the influence of the momentum spread on the standard deviation of the revolution period, which would lead to a much improved mass resolving power of IMS. One of the proposals to upgrade IMS is that the velocity of secondary ions could be directly measured by using two time-of-flight (double TOF) detectors installed in a straight section of a storage ring. In this paper, we outline the principle of IMS with double TOF detectors and the method to correct the momentum spread of stored ions.

arXiv commentAccepted by Nuclear Inst. and Methods in Physics Research, B

References in corpus (4)

• Isochronicity Correction in the CR Storage Ring
• Conceptual design of elliptical cavities for intensity and position sensitive beam measurements in storage rings
• A data analysis method for isochronous mass spectrometry using two time-of-flight detectors at CSRe
• Accurate correction of magnetic field instabilities for high-resolution isochronous mass measurements in storage rings

Cited by in corpus (7)

• Heavy-Ion Storage Rings and Their Use in Precision Experiments with Highly Charged Ions
• Particle identification and revolution time corrections for the isochronous mass spectrometry in storage rings
• Characterization of a double Time-Of-Flight detector system for accurate velocity measurement in a storage ring using laser beams
• A method to measure the transition energy ${\gamma }_t$ of the isochronously tuned storage ring
• Charge resolution in the isochronous mass spectrometry and the mass of ${}^{51}$Co
• Electrostatic-lenses position-sensitive TOF MCP detector for beam diagnostics and new scheme for mass measurements at HIAF
• Improving the resolving power of Isochronous Mass Spectrometry by employing an in-ring mechanical slit