Development of electro-optics for extending the lifetime of the Micro-Channel Plate detectors in high flux regions

Details Development of electro-optics for extending the lifetime of the Micro-Channel Plate detectors in high flux regions Development of electro-optics for extending the lifetime of the Micro-Channel Plate detectors in high flux regions

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh31b2018s&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH31B-2018

Physics

Plasma Physics

[7831] Space Plasma Physics / Laboratory Studies And Experimental Techniques

Scientific paper

We have constructed and tested a prototype detector designed to measure the energy spectra and composition of electrons and ions between ~30 keV to a few MeV. Low energy particle detectors such as this design have many applications in space including heliospheric and planetary particle environments. The prototype consists of a Time of Flight (TOF) detector with a pathlength of 6 cm and solid state detectors at the back end of the instrument to measure energy. The ToF is measured with the use of foils that generate secondary electrons as primary electrons and ions pass through the instrument. The arrival of secondary electrons is registered with Multi Channel Plate (MCP) detectors. The secondary electrons can be steered and focused onto the MCP devices through the use of electrostatic optics. Simulations of these optics confirm that small changes in the electrostatic optic voltages provide the necessary trajectory changes in secondary electrons required to optimize our particle detector design. For example, the uncertainty in the TOF measurement is directly affected by the ability to adequately focus the secondary electrons. We present the prototype design and performance capabilities and the results of our simulations of the electrostatic optics.

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