An MCP-based detector array with integrated electronics

Langstaff, D. P.

doi:10.1016/s1387-3806(01)00578-4

Cited by 6 publications

(5 citation statements)

References 48 publications

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“…the columns of A are the objects used to fit to the measured spectrum. If a set of t is found with χ 2 ⩽ n then the t with maximum entropy should be selected 5. In the present work the minimum χ 2 was always greater than n and therefore it was not necessary to maximize the entropy.…”

Section: Forward Deconvolutionmentioning

confidence: 87%

“…This is a broad definition since such a dark count could arise from either the MCP itself or a noisy MCP readout (the array on the silicon chip). However, the detector array on the silicon chip is essentially noiseless 5. Also, the development of MCPs with lower and lower dark counts is an active area of research6 and in principle the level of MCP dark counts can be reduced to a very low level.…”

Section: Measurement and Processingmentioning

confidence: 99%

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Deconvolution of mass spectra measuredwith a non‐uniform detector array to give accurate ion abundances

Birkinshaw¹

2003

J. Mass Spectrom.

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Array detectors are under active development since they offer large improvements in the efficiency of mass spectrum measurements. High quality is always a requirement whether array detectors are used for ions, electrons, UV, x-rays, etc., but in mass spectrometry the very high accuracy frequently needed in ion abundance measurements for isotope ratios is unique. These demands necessitate modelling the measurement process and careful deconvolution of the measured data. A linear model in terms of matrix algebra is presented in which the incident spectrum (unknown) and the measured spectrum are represented by column matrices and the action of the detector array on the incident spectrum is represented by an experimentally measurable square 'A' matrix. Residual noise in this matrix can be minimized following a singular value decomposition procedure and its use in 'forward deconvolution' of measured spectra is discussed. The random error in the incident ion counts is accounted for after the deconvolution since this is not an error from the perspective of the detector. The microchannel plate electron multiplier gain distribution is an important feature of the deconvolution.

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Section: Forward Deconvolutionmentioning

confidence: 87%

Section: Measurement and Processingmentioning

confidence: 99%

Deconvolution of mass spectra measuredwith a non‐uniform detector array to give accurate ion abundances

Birkinshaw¹

2003

J. Mass Spectrom.

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“…Similarly, it has not been possible to directly determine the linearity of the present device using the laboratory X-ray source, however the previous device [10] exhibited good linearity over at least 6 orders of magnitude.…”

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confidence: 86%

“…Earlier experiments with a similar MCP based device [10] yielded a maximum count rate in excess of 10 4 counts per second per pixel, leading to an overall count rate of approximately 4MHz across the array. The exact figure for the 384-and 768-channel devices will be determined in a series of experiments planned for the synchrotron radiation source.…”

mentioning

confidence: 99%

A fully integrated multi-channel detector for electron spectroscopy

Langstaff

Bushell

Chase

et al. 2005

Nuclear Instruments and Methods in Physics Research Section B:

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In electron spectroscopy, multi-channel detection combined with intense radiation sources provides the optimum experimental configuration. Building on the 5 mm, 192-channel ion detector developed at Aberystwyth, longer arrays have been fabricated for the detection of electrons in a commercial hemispherical analyser. The performance and reliability of a 10 mm, 384-detector array is discussed and the first array-detected photoelectron spectroscopy data for single-crystal diamond are presented. In scanning mode, the detector shows a large improvement compared to single channeltron detection and this improvement allows data to be collected in snapshot mode (1 second per spectrum) to enable real-time measurements.

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“…At present, several new array detectors for mass spectrometry are in various stages of development. − One of these array detectors, termed a focal plane camera (FPC), has been developed by Knight et al This novel device combines an array of Faraday cups, each with its own low-capacitance integrator, with a multiplexed readout. This detector has several advantages over conventional mass spectrometric array detectors.…”

mentioning

confidence: 99%

Characterization of a Focal Plane Camera Fitted to a Mattauch−Herzog Geometry Mass Spectrograph. 1. Use with a Glow-Discharge Source

et al. 2002

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A Mattauch-Herzog geometry mass spectrograph (MHMS) has been equipped with a novel array detector, the focal plane camera (FPC). The FPC consists of an array of gold Faraday cups, each coupled to its own integrator, with interrogation of the integrators performed by a multiplexer. The initial coupling of this instrument with a pin-type glow discharge source has provided limits of detection in the single to hundreds of nanograms per gram regime; isotope ratio accuracy and precision better than 5% error and 0.2% RSD, respectively; and a linear dynamic range of at least 6 orders of magnitude. A current weakness of the FPC is its pixel size, which limits both sensitivity and baseline resolution (to R = 130). The minimum data acquisition time for multiple images at present is 1 ms/image, with a dead time of 3.2 ms between images, which will limit the ability of the FPC to monitor extremely short transient signals.

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An MCP-based detector array with integrated electronics

Cited by 6 publications

References 48 publications

Deconvolution of mass spectra measuredwith a non‐uniform detector array to give accurate ion abundances

Deconvolution of mass spectra measuredwith a non‐uniform detector array to give accurate ion abundances

A fully integrated multi-channel detector for electron spectroscopy

Characterization of a Focal Plane Camera Fitted to a Mattauch−Herzog Geometry Mass Spectrograph. 1. Use with a Glow-Discharge Source

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