Channel electron multiplier efficiency for 10–1000 eV electrons

Bordoni, F.

doi:10.1016/0029-554x(71)90300-4

Cited by 75 publications

(21 citation statements)

References 7 publications

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“…The energy at which the geometric factor is cited is 1 keV. As expected, there is significant energy dependence in the geometric factor owing to variations in MCP detection efficiency with electron energy (Bordoni 1971); this variability is shown in Fig. 48.…”

Section: Des Uv Rejectionsupporting

confidence: 52%

Fast Plasma Investigation for Magnetospheric Multiscale

Pollock¹,

Moore²,

Jacques³

et al. 2016

Space Sci Rev

1,095

1,093

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The Fast Plasma Investigation (FPI) was developed for flight on the Magnetospheric Multiscale (MMS) mission to measure the differential directional flux of magnetospheric electrons and ions with unprecedented time resolution to resolve kinetic-scale plasma dynamics. This increased resolution has been accomplished by placing four dual 180-degree top hat spectrometers for electrons and four dual 180-degree top hat spectrometers for ions around the periphery of each of four MMS spacecraft. Using electrostatic fieldof-view deflection, the eight spectrometers for each species together provide 4pi-sr field-ofview with, at worst, 11.25-degree sample spacing. Energy/charge sampling is provided by swept electrostatic energy/charge selection over the range from 10 eV/q to 30000 eV/q. The eight dual spectrometers on each spacecraft are controlled and interrogated by a single block redundant Instrument Data Processing Unit, which in turn interfaces to the observatory's Instrument Suite Central Instrument Data Processor. This paper describes the design of FPI, its ground and in-flight calibration, its operational concept, and its data products.

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Section: Des Uv Rejectionsupporting

confidence: 52%

Fast Plasma Investigation for Magnetospheric Multiscale

Pollock¹,

Moore²,

Jacques³

et al. 2016

Space Sci Rev

1,095

1,093

View full text Add to dashboard Cite

show abstract

“…Post-acceleration of the electrons by a positive potential of 100 V applied to the channeltron cone localised the energy of the collected electrons close to the flat maximum of the channeltron detection efficiency curve as determined by several authors (Schmidt 1969, Bordoni 1971, Arnoldy et al 1973 (in agreement with unpublished results of Meckbach et al (1972), and also in agreement with a theoretical discussion by Bordoni (1971), derived from Lye and Dekker's (1957) theory of secondary electron emission). According to this dependence, within the electron energy range of about 170-400 eV covered in this work, the channeltron efficiency experienced changes of not more than 5%.…”

Section: Experimental Approachsupporting

confidence: 88%

The Approximation Method for Approximating Solutions of Linear Differential Equations by Algebraic Polynomials

Dzjadyk¹

1974

Math. USSR Izv.

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Our study is designed to test whether or not existing 'charge transfer to the continuum' theory adequately explains the production of ci 2 U, electrons resulting from 0.2-0,s MeV H C and H: ion bombardment of thin carbon foils; the work suggests that it does not. The differential energy and angular distributions of the emitted electrons are discussed in terms of the vectorial electron-ion velocity differences (U, -vi). Although the cusp shaped peaks in both angle and energy are observed, (i) the /U, -~'~1 -l dependence predicted by all 'charge transfer into the continuum' theories is not found; furthermore, (ii) the predicted increase in cusp width when plotted in terms of (uea,) and as a function of E, is not found; finally (iii) it is confirmed that the yield of U, = ui electrons from H + bombardment is not the predicted E r 5 but rather very nearly an E,dependence through our energy range. Furthermore, the cusp widths associated with H + ions are considerably larger than those for equal velocity H i ions. Many of our observations may reflect solid state processes which occur prior to the time the ion passes through the foil surface into the vacuum.

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“…Instrument uncertainties include uncertainties derived from the (1) physical geometric factor, (2) microchannel plate transparency, (3) protection grid transparency, (4) active anode area ratio, (5) accumulation time, (6) energy resolution, (7) relative microchannel plate efficiency, and (8) detection efficiency (Bordoni, 1971). …”

Section: Photoelectron Peaks Observed In the Martian Ionospherementioning

confidence: 99%