Time of Flight, Delay Line Position, Energy, and Random Valid Event Foreground Background Logic, ASICs Based Microtechnologies and Methods for Space Particle Instruments

Details Time of Flight, Delay Line Position, Energy, and Random Valid Event Foreground Background Logic, ASICs Based Microtechnologies and Methods for Space Particle Instruments Time of Flight, Delay Line Position, Energy, and Random Valid Event Foreground Background Logic, ASICs Based Microtechnologies and Methods for Space Particle Instruments

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm11b1608p&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM11B-1608

Mathematics

Logic

2794 Instruments And Techniques, 2799 General Or Miscellaneous, 7594 Instruments And Techniques, 7599 General Or Miscellaneous

Scientific paper

Space particle instruments fall in the general category of nuclear instrumentation and have a history parallel to the start of the space age. The accumulated knowledge on space particle distributions cover earth's and planetary environments from the ionosphere, plasma sphere, radiation belts, magnetosphere and magnetotail, sheaths, shocks and the solar wind. Some general properties of the particle distributions are: (a) huge energy dynamic range from few eV in the plasma spheres and solar wind to hundreds of MeVs in radiation belts and solar events, (b) huge flux dynamic ranges, (c ) quasi Maxwellian distributions in the low energies up to ~10KeV and dynamic power laws in the tails, (d) quasi uniform 4-pi distributions or very directional beam like (electrons), (e) strong proton dominated, (f) fine ion composition requirements in the strong proton-electron presence such as He, CNO, Fe and in some cases isotopes. Standard instrument types covering these general distributional are: Plasma instruments with ESA/TOF sensors from eV up to ~40KeV, energetic particle with TOF/SSDs in the energy range 10KeV to 10MeV, Energetic Neutral Atoms with TOF/SSD/2D position, and stacked SSDs in the energy range up to hundreds of MeV. All the above instrument categories have to deal with huge energy and flux dynamic range, directionality and composition of Pericles in the presence of strong energetic particle backgrounds. This work presents a set of advanced ASICs based micro technologies that deal in an integral way with the fundamental measurements of time of flight in the range of 0-1μs with resolutions <50ps using the TOF chip, energy with few KeV resolution in the range 1KeV to 100MeV with the multi-channel SSD Energy chip, delay line 1D/2D position with discrete LC delay lines and the TOF chip, valid event logic for random distributions and optional single/double/triple coincidence. The technologies have and inherent selectable trade off between power dissipation, resolution and counting rates and finally mass reduction. The presentation is in the context of energetic particle instruments, ENA imagers and plasma instruments flown or baselined on several NASA missions withJHU/APL leadership or participation, such as CASSINI, IMAGE, MESSENGER, NH/PLUTO, RBSP, MMS, JUNO

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