A new ion detector array and digital-signal-processor-based interface

D. P. Langstaff*, M. W. Lawton, T. M. McGinnity, D. M. Forbes, K. Birkinshaw

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A new one-dimensional ion detector array on a silicon chip has been developed for use in mass spectrometry. It is much smaller and simpler than electro-optical arrays currently in use and in addition has a higher resolution and a zero noise level. The array consists of a one-dimensional array of metal strips (electrodes) with a pitch of 25 mu m on the top surface of a silicon chip, each electrode having its own charge pulse sensor, 8-bit counter and control/interface circuitry. The chip is mounted on a ceramic substrate and is preceded by a micro-channel plate electron multiplier. Chips are butted to give a longer array. Test results show a stable operating region. A digital-signal-processor-based interface is described, which controls the mode of operation and reads the accumulated array data at the maximum rate to avoid counter overflow.

Original languageEnglish
Article number011
Pages (from-to)389-393
Number of pages5
JournalMeasurement Science and Technology
Volume5
Issue number4
DOIs
Publication statusPublished - 1994

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