Ion-Sensitive Plate Detectors in Mass Spectrometry

McCrea, J. M.

doi:10.1366/000370271779948547

Cited by 9 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The slight increase in indicates that the dependence of on the m/z ratio is minor. These results contradict the results reported by other researchers (46,47,176,222,224,227,230,235,238,239). These researchers found an overall decrease in slope and a significant increase in T^ for increasing m/z ratios.…”

Section: Average the Deviationscontrasting

confidence: 87%

Improvement in the analysis of ashes from coal by spark source mass spectrography

Welcomer

View full text Add to dashboard Cite

Section: Average the Deviationscontrasting

confidence: 87%

Improvement in the analysis of ashes from coal by spark source mass spectrography

Welcomer

View full text Add to dashboard Cite

“…Table 1 presents the details for all exposures used in our work, and Figure 2 shows a sample from one of the spectra described in Table 1. The grain size in the photographic plates, roughly 0.5 µm (McCrea 1971), gives the photographic plates a significant advantage over the other available VUV imaging techniques in terms of resolution and subsequent linewidth. The high density of spectral lines present in the invar spectrum makes the additional resolution provided by photographic plates necessary.…”

Section: Experimental Methodsmentioning

confidence: 99%

Spectra of Ni v and Fe v in the Vacuum Ultraviolet

Ward¹,

Raassen²,

Kramida³

et al. 2019

ApJS

View full text Add to dashboard Cite

This work presents 97 remeasured Fe V wavelengths (1200Å to 1600Å) and 123 remeasured Ni V wavelengths (1200Å to 1400Å) with uncertainties of approximately 2 mÅ. An additional 67 remeasured Fe V wavelengths and 72 remeasured Ni V wavelengths with uncertainties greater than 2 mÅ are also reported. A systematic calibration error is also identified in the previous Ni V wavelengths and is corrected in this work. Furthermore, a new energy level optimization of Ni V is presented that includes level values as well as Ritz wavelengths. This work improves upon the available data used for observations of quadruply ionized nickel (Ni V) in white dwarf stars. This compilation is specifically targeted towards observations of the G191-B2B white dwarf spectrum that has been used to test for variations in the fine structure constant, α, in the presence of strong gravitational fields (Berengut et al. 2013). The laboratory wavelengths for these ions were thought to be the cause of inconsistent conclusions regarding the variation limit of α as observed through the white dwarf spectrum. These inconsistencies can now be addressed with the improved laboratory data presented here.

show abstract

“…Earlier, photographic plates , and electro-optic imaging detectors , were used with sector-field instruments to achieve simultaneous mass analysis. However, such devices have fallen into disuse because of their inferior detection capabilities compared to single-channel ion detectors .…”

mentioning

confidence: 99%

Evaluation of a 512-Channel Faraday-Strip Array Detector Coupled to an Inductively Coupled Plasma Mattauch−Herzog Mass Spectrograph

et al. 2009

View full text Add to dashboard Cite

A 512-channel Faraday-strip array detector has been developed and fitted to a Mattauch-Herzog geometry mass spectrograph for the simultaneous acquisition of multiple mass-to-charge values. Several advantages are realized by using simultaneous detection methods, including higher duty cycles, removal of correlated noise, and multianalyte transient analyses independent of spectral skew. The new 512-channel version offers narrower, more closely spaced pixels, providing improved spectral peak sampling and resolution. In addition, the electronics in the amplification stage of the new detector array incorporate a sample-and-hold feature that enables truly simultaneous interrogation of all 512 channels. While sensitivity and linear dynamic range remain impressive for this Faraday-based detector system, limits of detection and isotope ratio data have suffered slightly from leaky p-n junctions produced during the manufacture of the semiconductor-based amplification and readout stages. This paper describes the new 512-channel detector array, the current dominant noise sources, and the figures of merit for the device as pertaining to inductively coupled plasma ionization.

show abstract

Ion-Sensitive Plate Detectors in Mass Spectrometry

Cited by 9 publications

References 26 publications

Improvement in the analysis of ashes from coal by spark source mass spectrography

Improvement in the analysis of ashes from coal by spark source mass spectrography

Spectra of Ni v and Fe v in the Vacuum Ultraviolet

Evaluation of a 512-Channel Faraday-Strip Array Detector Coupled to an Inductively Coupled Plasma Mattauch−Herzog Mass Spectrograph

Contact Info

Product

Resources

About