Compact Dual Ion Composition Experiment for space plasmas—CoDICE

Abstract

The Compact Dual Ion Composition Experiment—CoDICE—simultaneously provides high‐quality plasma and energetic ion composition measurements over six decades in energy in a wide variety of space plasma environments. CoDICE measures two critical ion populations in space plasmas: (1) Elemental and charge state composition, and 3‐D velocity distributions of <10 eV/q–40 keV/q plasma ions; and (2) Elemental composition, energy spectra, and angular distributions of ∼30 keV–>10 MeV energetic ions. CoDICE uses a novel, integrated, common time‐of‐flight subsystem that provides several advantages over the commonly used separate plasma and energetic ion sensors currently flying on several space missions. These advantages include reduced mass and volume compared to two separate instruments, reduced shielding in high‐radiation environments, and simplified spacecraft interface and accommodation requirements. This paper describes the operation principles, electro‐optic simulation results and applies the CoDICE concept for measuring plasma and energetic ion populations in Jupiter's magnetosphere.

Triple‐Dome Electrostatic Energy Analyzer With 360° Field‐Of‐View for Simultaneous Measurements of Ions and Electrons

“…We presupposed that the inner collimator ring has half of the voltage applied to the middle dome. Desai et al (2015Desai et al ( , 2016) also introduced a similar type of deflector-type collimator. All portions of curved surfaces are formed not by simply spherical but spheroidal shapes, which implies that there would be an enormous amount of appropriate configurations of electrostatic analyzers satisfying the measurement requirements in each space plasma exploration mission.…”

Interstellar Mapping and Acceleration Probe (IMAP): A New NASA Mission

“…The Compact Dual Ion Composition Experiment (CoDICE) combines an ESA with a common TOF versus energy (TOF/E) subsystem to simultaneously measure (1) the 3D velocity distribution functions (VDFs) and ionic charge state and mass composition of ∼ 0.5-80 keV/q ions in CoDICE Lo , and (2) the mass composition and arrival direction of ∼ 0.03-5 MeV/nuc ions in CoDICE H i (Desai et al 2015(Desai et al , 2016b. CoDICE H i also measures ∼ 20-600 keV electrons.…”

Time‐of‐flight mass spectrographs—From ions to neutral atoms

“…The Advanced Mass and Ionic Charge Composition Experiment provides simultaneous coverage over a range of energies, thus reducing the number of energy steps by about a factor of 10 [Allegrini et al, 2009. With a "flower-shaped" ESA that has a wide opening at the entrance and exit, but is narrow in its middle, the Suprathermal Ion Monitor provides simultaneous coverage over a range in energy and imaging of about 40°in elevation angle Desai et al, 2016]. Elevation angle and E/Q are obtained by position sensing at the detector.…”