In April 2016 Manchester eScholar was replaced by the University of Manchester’s new Research Information Management System, Pure. In the autumn the University’s research outputs will be available to search and browse via a new Research Portal. Until then the University’s full publication record can be accessed via a temporary portal and the old eScholar content is available to search and browse via this archive.

Investigation of a Quadrupole Mass Filter Employing a Novel Digital Waveform and Discontinuous Ion Introduction

Jeffrey, Benjamin

[Thesis]. Manchester, UK: The University of Manchester; 2020.

Access to files

Abstract

Theoretical investigation of a quadrupole mass filter using an ion conditioning system to synchronise ion entry with the optimal phase of the applied Radio Frequency (RF) signal in order to improve the resolution of the instrument. The RF signal that is proposed to be used is the N6 EC signal described by E. Sheretov. The goal of the project was to simulate the performance of a quadrupole mass filter driven with such a signal, and compare this with conventional RF signals. The theory behind the EC signals was investigated, and it is shown that the EC signal increases the optimal input phase region significantly compared to conventional RF signals. The transmission of a bunch of ions was investigated for a quadrupole mass filter driven by the N6 EC signal, and the impacts of altering temperature, operating line, and initial RF phase were studied. The N6 EC is shown to improve the transmission resolution and peak shape compared to a sinusoidal RF. The origins of the improvements is discussed. The impact of quadrupole rod parameters on the transmission performance was investigated, and a maximum theoretical attainable resolution was calculated to be over 75,000, where resolution is defines as mass divided by full width half maximum of the peak.

Bibliographic metadata

Type of resource:
Content type:
Form of thesis:
Type of submission:
Degree type:
Master of Philosophy
Degree programme:
MPhil Physics
Publication date:
Location:
Manchester, UK
Total pages:
133
Abstract:
Theoretical investigation of a quadrupole mass filter using an ion conditioning system to synchronise ion entry with the optimal phase of the applied Radio Frequency (RF) signal in order to improve the resolution of the instrument. The RF signal that is proposed to be used is the N6 EC signal described by E. Sheretov. The goal of the project was to simulate the performance of a quadrupole mass filter driven with such a signal, and compare this with conventional RF signals. The theory behind the EC signals was investigated, and it is shown that the EC signal increases the optimal input phase region significantly compared to conventional RF signals. The transmission of a bunch of ions was investigated for a quadrupole mass filter driven by the N6 EC signal, and the impacts of altering temperature, operating line, and initial RF phase were studied. The N6 EC is shown to improve the transmission resolution and peak shape compared to a sinusoidal RF. The origins of the improvements is discussed. The impact of quadrupole rod parameters on the transmission performance was investigated, and a maximum theoretical attainable resolution was calculated to be over 75,000, where resolution is defines as mass divided by full width half maximum of the peak.
Thesis main supervisor(s):
Thesis co-supervisor(s):
Language:
en

Institutional metadata

University researcher(s):

Record metadata

Manchester eScholar ID:
uk-ac-man-scw:325146
Created by:
Jeffrey, Benjamin
Created:
19th June, 2020, 15:31:53
Last modified by:
Jeffrey, Benjamin
Last modified:
2nd July, 2020, 11:24:15

Can we help?

The library chat service will be available from 11am-3pm Monday to Friday (excluding Bank Holidays). You can also email your enquiry to us.