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Please use this identifier to cite or link to this item: http://hdl.handle.net/10651/8560

Title: Spectroscopic evaluation of a compact magnetically boosted radiofrequency glow discharge for time-of-flight mass spectrometry
Author(s): Vega Reguilón, Paola
Pisonero Castro, Jorge
Bordel García, Nerea
Tempez, Agnès
Ganciu, Mihai
Sanz Medel, Alfredo
Keywords: Magnetic Field . Radiofrequency Glow Discharge Time-Of-Flight Mass Spectrometry . Depth Profiling
Issue date: 2009
Publisher version: http://dx.doi.org/10.1007/s00216-009-2688-x
Citation: Analytical and Bioanalytical Chemistry, 394(1), p. 373-382 (2009); doi:10.1007/s00216-009-2688-x
Format extent: p. 373-382
Abstract: A compact magnetically boosted radiofrequency glow discharge (GD) has been designed, constructed and its analytical potential evaluated by its coupling to a mass spectrometer (MS). Simple modifications to the original source configuration permitted the insertion of permanent magnets. Small cylindrical Nd–Fe–B magnets (∅=4 mm, h=10 mm) were placed in an in-house-modified GD holder disc that allows easy and fast exchange of the magnets. The different processes taking place within the GD plasma under the influence of a magnetic field, such as sputtering, ionisation processes and ion transport into the MS, were studied using different GD operating conditions. Changes to the ionisation and ion transport efficiency caused by the magnetic field were studied using an rf-GD-TOFMS setup. A magnetic field of 60–75 gauss (G) was found not to affect the sputtering rates but to enhance the analyte ion signal intensities while decreasing the Ar species ion signals. Moreover, magnetic fields in this range were shown not to modify the crater shapes, enabling the fast and sensitive high depth resolved analysis of relatively thick coated samples (micrometre) by using the designed compact magnetically boosted rf-GD-TOFMS.
URI: http://hdl.handle.net/10651/8560
ISSN: 1618-2642
Local identifier: 20090623
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