Resolving power enhancement of a discrete detector (array) by single event detection

Sinha, Mahadeva P.; Langstaff, D. P.; Narayan, D.J.; Birkinshaw, K.

doi:10.1016/s1387-3806(98)14002-2

Cited by 17 publications

(11 citation statements)

References 3 publications

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“…61 The other fits into an 18 ð 12 ð 3.5 in ¾46 ð 30 ð 9 cm briefcase, uses a permanent 0.44 T magnet and runs on four 12 V laptop PC batteries, with no upper mass range specified. 60 With a miniature piezoelectric inlet valve and a miniature ion pump (base pressure 5 ð 10 8 Torr), a resolution of 500-1000 for a sample pressure of 10 7 Torr was achieved. The limited data available from the two instruments mean that it is too early to compare the relative merits of each system.…”

Section: Ion Cyclotron Resonancementioning

confidence: 99%

Miniature mass analyzers

2000

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Increased efforts are being made to develop miniature mass spectrometers, including those which are hand-portable, and to retain the performance characteristics of traditional laboratory instruments as much as possible in the miniature instruments. This review of miniature mass analyzers emphasizes analytical performance and compares the relative merits of each type of miniature mass analyzer. Miniature instruments discussed include sector, Wien filter, time-of-flight, linear quadrupole, quadrupole ion trap and Fourier transform ion cyclotron resonance mass spectrometers, as well as combinations of and variations on these major types. Special considerations that apply to small mass analyzers are noted and suggestions are made regarding the possible future development of this field. Copyright 2000 John Wiley & Sons, Ltd.

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Section: Ion Cyclotron Resonancementioning

confidence: 99%

Miniature mass analyzers

2000

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“…This charge cloud spreading results in multiple triggering within event counting detectors, leading to degradation of spatial resolution and statistical noise on the resultant spectrum. Although, it is possible to correct for this degradation in software by taking many images with a very short dwell time [3], such an approach is limited in application owing to the low data rate achievable. We therefore present a scheme for reducing such multiple triggering using voting circuits interposed between the sensor amplifiers and the counters in an event counting detector [4].…”

Section: Introductionmentioning

confidence: 99%

Reduction of multiple triggering in counting detectors

Zhu

Langstaff

2009

Nuclear Instruments and Methods in Physics Research Section A:

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We present a scheme for reducing multiple triggering based on a "first-past-the-post" voting circuit interposed between the sensor amplifier/discriminators and the counters in an event counting detector. We are currently designing a proof on concept circuit to implement the scheme and present simulations and preliminary layout to show how this circuit will operate and integrate with the rest of the detector array.

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“…All materials used are ultrahigh vacuum (UHV) compatible such that, following incorporation of the detector module, the spectroscopy chamber achieved its routine base pressure of below 10 -10 mbar. Preliminary testing of the array detector included measurement of the point spread function for the detector (using a technique of speckle imaging [5,6]), the determination of the noise floor, measurement of the array uniformity and determination of readout speed and maximum count rate. To determine the point spread function, the array was uniformly illuminated with electrons and a short integration time chosen such that no counter received more than one event per integration period.…”

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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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Resolving power enhancement of a discrete detector (array) by single event detection

Cited by 17 publications

References 3 publications

Miniature mass analyzers

Miniature mass analyzers

Reduction of multiple triggering in counting detectors

A fully integrated multi-channel detector for electron spectroscopy

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