Fundamental Technologies Cassini MIMI Pages

List of Figures in This Section

I. Hong and Armstrong Technical Report

• Cross-section of mechanical drawing of Cassini MIMI/LEMMS
• Polygon modeled geometry of Cassini/MIMI/LEMMS, view angle of q = 45º and f=45º
• Polygon modeled geometry of Cassini/MIMI/LEMMS, view angle of q = 0º and f=90º
• Polygon modeled geometry of Cassini/MIMI/LEMMS, view angle of q = -75º and f=80º
• Dimensions of the E and F detectors
• Contour of the magnetic field produced by a rectangular slab with a=0.15 cm and b=0.8 cm
• Locations of the two magnetic slabs
• Comparison of the calculated vs. measured values of the magnetic field at z=0 cm of various y
• Contour of the calculated magnetic field at z=0 cm
• The mesh and contour of the calculated magnetic field at z=0 cm
• Comparison of the improved calculated vs. measured values of magnetic field at z=0 cm of various y
• Contour of the improved calculated magnetic field at z=0 cm
• The mesh and contour of the improved calculated magnetic field at z=0 cm
• Contour of the improved calculated magnetic field at x=1 cm plane
• Contour of the improved calculated magnetic field at x=3 cm plane
• Geometric factors of E and F detectors, first magnetic field simulation
• Geometric factors of E and F detectors, better fit magnetic field simulation
• Comparison of the geometric factors of two magnetic field simulations
• Trajectories of escaped electrons for E=20 keV
• Trajectories of escaped electrons for E=30 keV
• Trajectories of escaped electrons for E=40 keV
• Trajectories of escaped electrons for E=50 keV
• Trajectories of escaped electrons for E=60 keV
• Trajectories of escaped electrons for E=70 keV
• Trajectories of escaped electrons for E=80 keV
• Trajectories of escaped electrons for E=90 keV
• Trajectories of escaped electrons for E=100 keV
• Trajectories of escaped electrons for E=200 keV (starting from 3.595, 1.44, 0)
• Trajectories of escaped electrons for E=300 keV (starting from 3.595, 1.44, 0)
• Trajectories of escaped electrons for E=400 keV (starting from 2.695, 1.44, 0)
• Trajectories of escaped electrons for E=500 keV (starting from 3.745, 1.44, 0)
• Trajectories of escaped electrons for E=200 keV (starting from 4.625, 1.44, 0)
• Trajectories of escaped electrons for E=300 keV (starting from 4.625, 1.44, 0)
• Trajectories of escaped electrons for E=400 keV (starting from 4.625, 1.44, 0)
• Trajectories of escaped electrons for E=500 keV (starting from 4.625, 1.44, 0)
• Trajectories of escaped electrons for E=600 keV
• Trajectories of escaped electrons for E=700 keV
• Trajectories of escaped electrons for E=800 keV
• Trajectories of escaped electrons for E=900 keV
• Trajectories of escaped electrons for E=1000 keV
• Trajectories of escaped electrons for E=1200 keV
• Trajectories of escaped electrons for E=1400 keV
• Trajectories of escaped electrons for E=2000 keV
• Trajectories of escaped electrons for E=3000 keV

II. Historical MIMI Notes/Memos

• Diagram of MIMI/LEMMS
• LEMMS B, C, D detectors, incident energy vs. energy loss
• Radiation yield for e^- in Al and W
• Transmission of x-rays through 200 μ Si; Absorption of x-rays in 5000 μ Si
• Full energy detection efficiency (%) vs. energy (keV)
• Passbands for MIMI/LEMMS 180 degree end, 1/93 version
  • Efficiency for protons vs. incident energy, MIMI-93-3
  • Efficiency for helium 4 vs. incident energy, MIMI-93-3
  • Efficiency for oxygen 16 vs. incident energy, MIMI-93-3
  • Efficiency for protons vs. incident energy, MIMI-93-4
  • Efficiency for helium 4 vs. incident energy, MIMI-93-4
  • Efficiency for oxygen 16 vs. incident energy, MIMI-93-4
  • Efficiency for protons vs. incident energy, MIMI-93-5
  • Efficiency for helium 4 vs. incident energy, MIMI-93-5
  • Efficiency for oxygen 16 vs. incident energy, MIMI-93-5
• Design Criteria, May 31, 1993, development version
  • Energy loss vs. incident energy (D1)
  • Energy loss vs. incident energy (D2)
  • Energy loss vs. incident energy (D3)
  • Efficiency for protons vs. incident energy (LEMMS I)
  • Efficiency for protons vs. incident energy (LEMMS II)
  • Efficiency for protons vs. incident energy (LEMMS III)
  • Efficiency for helium 4 vs. incident energy (LEMMS I)
  • Efficiency for helium 4 vs. incident energy (LEMMS III)
  • Efficiency for helium 4 vs. incident energy (LEMMS II)
  • Efficiency for oxygen 16 vs. incident energy (LEMMS III)
  • Efficiency for oxygen 16 vs. incident energy (LEMMS I)
  • Efficiency for oxygen 16 vs. incident energy (LEMMS II)
• LEMMS 180 degree end design criteria
• Detection probability for x-rays
• Saturnian x-ray spectra computed for observation distances of 10 R_S and 50 R_S
• Suggestions on LEMMS design - June 16, 1993 version
  • Efficiency for protons vs. incident energy (LEMMS H)
  • Efficiency for helium 4 vs. incident energy (LEMMS H)
  • Efficiency for protons vs. incident energy (LEMMS H) (different channels)
  • Efficiency for oxygen 16 vs. incident energy (LEMMS H)
  • Efficiency for helium 4 vs. incident energy (LEMMS H) (different channels)
  • Efficiency for oxygen 16 vs. incident energy (LEMMS H) (different channels)
  • LEMMS H delta E vs. E, absorbers 2 and 3
  • LEMMS H delta E vs. E, absorbers 3 and 4
  • LEMMS H energy loss vs. incident energy, absorber 2
  • LEMMS H energy loss vs. incident energy, absorber 3
  • LEMMS H energy loss vs. incident energy, absorber 4
  • LEMMS H energy loss vs. incident energy, absorber 5
• LEMMS Passbands Design Memo, 3/8/95 Version
  • MIMI/LEMMS simplified 180 degree end geometry
  • MIMI/LEMMS 0 degree end plots
    • Passband plots (electron passbands; proton passbands; alpha passbands; oxygen passbands)
    • Energy loss plots (detector A; detector B; detector D4; detector A vs. detector B)
  • MIMI/LEMMS 180 degree end plots
    • Passband plots (electron passbands; proton passbands; alpha passbands; oxygen passbands)
    • Energy loss plots (detectors D1, D2, D3, D4; detector D1 vs. D2; detector D2 vs. D3; detector D3 vs. D4)
• Cassini MIMI team meeting, Lindau, Germany, October 1994, presentation materials:
  • Introduction and Mission Status
    • Cassini Oct. 1997 VVEJGA, inner solar system
    • Cassini Oct. 1997 VVEJGA, interplanetary trajectory
    • Venus 2 flyby, trajectory south pole view
    • Earth flyby, trajectory north pole view
    • Maximum inclination vs. period, Vsat = 5.573 km/s, V∞ - 5.500 km/s
    • Baseline SOI burn geometry and spacecraft orientation
    • Early SOI burn geometry and spacecraft orientation
    • Spacecraft rolls and look directions (baseline burn scenario; earlier burn scenario)
    • Titan radar flyby
    • Cassini 16 day orbit scenario timeline
    • Reference operational mode
    • Cassini early cruise phase
    • MAG boom deployment and alignment determination strategy
    • Cassini late cruise phase
    • Cassini-VVEJGA, Jupiter magnetotail passages
    • Transitions between ORS/DLFPW modes
    • Sample orbit observations and operational modes
  • Report on LEMMS Passband Design
    • Voyager LECP Electron Spectra at Equal (B,L)
    • LECP on Voyager 2
    • Voyager LECP Ion Spectra at Equal (B,L)
    • LEMMS 0 Degree Electron and Proton Passbands
    • MIMI 180 Degree Electron and Proton Passbands
    • MIMI 0 Degree Oxygen, Electron, Proton, and Helium Passbands
    • MIMI 180 Degree Helium, Proton, Electron, and Oxygen Passbands
    • MIMI 150 Energy Loss vs. Incident Energy - Absorber 2 (2 figures)
    • MIMI 150 Energy Loss vs. Incident Energy - Absorber 3
    • MIMI 150 Energy Loss vs. Incident Energy - Absorber 4
    • MIMI 150 Energy Loss vs. Incident Energy - Absorber 7
    • MIMI 150 Delta E vs. E - absorber 2 & absorber 3 (2 figures)
    • MIMI 150 Delta E vs. E - absorber 3 & absorber 4
    • MIMI 150 Delta E vs. E - absorber 4 & absorber 5
    • Incident energy MeV/Nuc, efficiency for Electrons (4 figures)
    • Incident Energy MeV/Nuc, Efficiency for Protons, MIMI B-1 (2 figures)
    • Incident Energy MeV/Nuc, Efficiency for Helium 4, MIMI B-1 (2 figures)
    • Incident Energy MeV/Nuc, Efficiency for Carbon 12
    • Incident Energy MeV/Nuc, Efficiency for Oxygen 16, MIMI B-1
    • Incident Energy MeV/Nuc, Efficiency for Iron 56, MIMI B-1
    • Incident Energy MeV/Nuc, Efficiency for Protons, MIMI 150 (4 figures)
    • Incident Energy MeV/Nuc, Efficiency for Helium 4, MIMI 150 (3 figures)
    • Incident Energy MeV/Nuc, Efficiency for Oxygen 16, MIMI 150
    • Incident Energy MeV/Nuc, Efficiency for Iron 56, MIMI 150
  • Telescope Design
    • LEMMS sensor
    • LEMMS sensor option A details
    • MIMI-LEMMS interface
    • Voyager LECP electron spectra at equal (B,L)
    • Calibration source, Ra²²⁶
  • LEMMS Mechanical and Sensor Layout
    • MIMI LEMMS assembly drawing
    • MIMI LEMMS assembly drawing #2
    • MIMI LEMMS mechanical drawing, turntable detail
    • MIMI LEMMS mechanical drawing, view 2
    • MIMI LEMMS mechanical drawing, view 3
    • MIMI LEMMS mechanical drawing, view 4
    • MIMI LEMMS mechanical drawing, view 5
    • MIMI LEMMS assembly drawing
    • LEMMS sensor drawing
    • LEMMS sensor drawing, detail
    • LEMMS mechanical drawing detail
    • LEMMS mechanical drawing detail
    • LEMMS mechanical drawing detail
    • LEMMS mechanical drawing detail
    • LEMMS mechanical drawing detail
  • Electronics Design
    • Board 1, LEMMS-DPU-interface and control circuit
    • Board 3 block diagram
    • Cassini MIMI LEMMS motherboard
  • LEMMS Application-Specific Integrated Circuits
    • The Commandable Discriminator Chip
      • Commandable discriminators (18 channels) and D/A converters (4 channels)
      • Threshold shifts vs. total dose - 0.1 Volts common mode, chip #6, file ext_0.1
      • Threshold shifts vs. total dose - 0.1 Volts common mode, normalized to 0.1 Volts, chip #6, file ext_0.1
      • Threshold shifts vs. total dose - 1 Volt common mode, chip #6, file int07_1.0
      • Threshold shifts vs. total dose - 1 Volt common mode, normalized to 1 Volt, chip #6, file int07_1.0
      • Measurements vs. total dose and vs. theoretical
      • Normalized % commandable, threshold shifts vs. total dose
      • 4-bit DAC output vs. total dose
      • 4-bit DAC output shift vs. total dose, % normalized to 0 Krad level
      • Discriminator threshold shift vs. temperature
    • CMDS01 - 18 RAD-HARD Commandable Discriminator Channels and 4 D/A Converter Channels
      • Commandable discriminator channel and digital to analog converter channel
      • Timing diagrams (write data cycle; read data cycle)
    • The accumulator chip - total dose test results for ACM03 ASIC
    • ACMO3 - Radiation Hardened Double Buffered Accumulator ASIC with Masked Actions and Parallel/Serial Readout
      • ACMO3 block diagram
      • Serial data readout format; Serial cascading of ACM03; Write data cycle
      • Parallel data read cycle; Serial readout
    • MIMI/LEMMS ASICS
      • Proposed Board 3 PCB layout, top side
      • Tel D control circuit
      • Tel AB control circuit
      • Tel EF control circuit
      • Tel AB
      • Tel D
      • Tel E₁E₂
  • LEMMS Turntable Design Status
    • Assembly drawings
    • Rotating the table
    • Latching the device
    • Rotation preventing profile and PEEK divider
    • Latch clamp ring
    • Operation of the LCR
    • KHM, an alternative design
    • Latch Actuating Mechanism (LAM)
    • Mass budget
  • LEMMS Checkout Equipment
    • Structure of LEMMS data
    • 1st byte
    • 2nd through 121st bytes (2nd databyte: counter MSB; 3rd databyte; counter LSB)
    • 122nd byte
    • 123rd byte
    • 124th data byte
    • PHA data byte
    • Structure of LEMMS test program (flow chart)
    • Tail pulse generator
    • Block diagram showing cycle key board, clock board, channel board, interface board, manual control board, etc.
  • INCA Sensor Design and Status
    • Cassini Magnetospheric Imaging Instrument drawing showing collimator assembly, upper and lower housing assemblies, and high voltage deflection plates
    • INCA sensor, collimator design heritage diagram
    • INCA collimator mechanical design
    • INCA collimator mechanical design, cross-section A-A, serrated collimator plates
    • Drawing showing lower electronics structure, deflection plate structure, trough/door assembly, upper housing
    • Drawing showing cable EMI shield termination housing, purge fitting, connector, system test connector cover, upper & lower housing
    • Drawing showing acoustic seal door (deployed) and latch, acoustic door torsion spring, front foil, shutter door (shown open with calibration sources), shutter door bi-metal spring housing and ball bearings, wax actuator.
    • Shutter door detail
    • Drawing showing door stowed
    • Door closed
    • 5 x 10 cm coincidence MCP assembly, 10 x 10 cm MCP assembly, 5 x 10 cm start/coincidence MCP assembly, high voltage wire tensioner, collimator interface brackets, etc.
    • Contour drawing from -300 to 1800, contour interval of 100
    • Contour from -280 to 400, interval of 40
    • Contour from -300 to 1800, contour interval of 100
    • INCA sensor ray tracing, part 1
    • INCA sensor ray tracing, part 2
    • High voltage compartment and power supplies, low voltage compartment, deflection plate power supply, preamp boards
    • INCA block diagram
  • CHEMS Sensor Design and Status
    • CHEMS geometry
    • Detector pyramid
    • Pyramid detector mount
    • Cassini CHEMS time-of-flight energy telescope, secondary electron trajectories
    • Canberra dead layer determination @ 100 keV proton
    • Canberra dead layer determination @ 200 keV proton
    • STICS detector dead layer determination @ 100 keV proton
    • STICS detector dead layer determination @ 200 keV proton
    • Canberra detector exposed to 200 keV Argon at 0.0 deg.
    • Canberra detector exposed to 200 keV Argon at 4.0 deg.
    • Main peak energy detected by Canberra detector for 200 keV Argon at different angles of incidence
    • Electron range vs. energy
    • Brief report on detector evaluation tests that were performed on 3/7/94 to 3/17/94 at NASA/GSFC
      • Plot of energy loss vs. (1/cos θ) for the MICRON detector for 100 keV protons; Plot of energy deficit vs. (1/cos θ) for the INTERTECHNIQUE detector for 100 keV protons
      • Plot of energy deficit vs. (1/cos θ) for the INTERTECHNIQUE detector for 200 keV protons; Plot of energy deficit vs. (1/cos θ) for the ORTEC detector for 100 keV protons
      • Plot of energy deficit vs. (1/cos θ) for the ORTEC detector for 200 keV protons
      • Plot of calculated window thickness in MICRON detector using the effective range method. The y-axis gives the calculated thickness for different angles of incidence.
      • Plot of calculated window thickness for the INTERTECHNIQUE detector for different angles of incidence (100 keV protons); Plot of calculated window thickness for the INTERTECHNIQUE detector for different angles of incidence (200 keV protons)
      • Plot of calculated window thickness for the ORTEC detector for different angles of incidence (100 keV protons)
      • Plot of calculated window thickness for the ORTEC detector for different angles of incidence (200 keV protons)
      • Pulse-height spectrum for the MICRON detector for 800 keV at Ar+ at normal incidence; Pulse-height spectrum for the MICRON detector for 800 keV at Ar+ at 10 deg. incidence.
      • Pulse-height spectrum for the INTERTECHNIQUE detector for 800 keV at Ar+ at normal incidence; Pulse-height spectrum for the INTERTECHNIQUE detector for 800 keV at Ar+ at 5 deg. incidence.
      • Pulse-height spectrum for the ORTEC detector incidence by 800 keV at Ar+ at 1 deg. incidence; Pulse-height spectrum for the ORTEC detector incidence for 800 keV at Ar+ at 4 deg. incidence.
    • Solid State Detectors Performance Valuation Tests Report II
      • Plot of energy loss vs. angle of incidence for the Canberra detector for 100 keV protons.
      • Plot of energy loss vs. angle of incidence for the STICS detector for 100 keV protons; Plot of energy loss vs. angle of incidence for the ORTEC detector for 100 keV protons.
      • Plot of energy loss vs. angle of incidence for the Canberra detector for 200 keV protons; Plot of energy loss vs. angle of incidence for the STICS detector for 200 keV protons.
      • Plot of energy loss vs. angle of incidence for the ORTEC detector for 200 keV protons.
  • Main Electronics Unit
    • Cassini MIMI Special Test Equipment Block Diagram
    • MIMI RTD input circuits
    • MIMI instrument power input circuits
    • MIMI decon. heater input circuits
    • MIMI actuator input circuits
    • MIMI backup actuator input circuits
    • MIMI repl. heater input circuits
    • Interface control drawing
    • MIMI electronics box, external view/radiation study
    • INCA assembly, external drawing
    • Sensor external configuration, bottom view
    • Connector diagrams:
      MEU-J1.CON (LEMMS control)
      MEU-J2.CON (S/C 1553 bus)
      MEU-J3.CON (INCA HVPS)
      MEU-J4.CON (INCA cont.)
      MEU-J5.CON (S/C power I/F)
      MEU-J6.CON (LEMMS power)
      MEU-J7.CON (CHEMS control)
      MEU-J8.CON (CHEMS DPPS I/F)
      MEU-J9.CON (CHEMS MCP HVPS I/F)
      A15J1 [37] (AE <->DPU,HK)
      A15J2 [37] (AE <->DPU,Proc)
      A15J4 LVPS -> AE, #1
      A15J5 LVPS -> AE, #2
  • DPU Design and Status
    • DPU block diagram
    • MIMI DPU BB memory board and processor board (2 figures)
    • MIMI DPU BB LEMMS - BIU I/F board and MIMI DPU BB test board (2 figures)
    • MIMI DPU BB (2 views)
    • MIMI DPU BB motherboard and MIMI DPU BB (2 figures)
    • DPU LEMMS motor interface
    • ACTEL: Watchdog, wait-state generator
    • Memory map of EPU
    • Memory map of CPU
    • ASIC bus address decoder, configuration and status registers, bus control logic, and interrupt controller
    • Synchronous Receiver Transmitter
    • EPU software tasks (preliminary design), normal mode
    • CPU software tasks (preliminary design), normal mode
    • MIMI LEMMS turntable/DPU interface
      • Control commands and signals
      • Commands timing diagram
      • DPU/LEMMS motor interface
  • Telemetry Modes and Allocations
    • INCA Image Planes: Spinning mode, neutral mode, ion mode
• Neil Divine Memo on Numerical Models for Electron and Proton Distributions in Saturn's Radiation Belts
  • Trajectories of Saturn flyby spacecraft in magnetic coordinates
  • Coverage of the data for the Saturn electron model as a function of L
  • Coverage of the data for the Saturn proton model as a function of L
  • Integral intensity for the Saturn electron model at 3 energy thresholds
  • Integral omnidirectional flux for the Saturn electron model at 3 energy thresholds
  • Integral intensity for the Saturn electron model at 3 sample values of L
  • Integral omnidirectional flux for the Saturn electron model at 3 sample values of L
  • Integral intensity for the Saturn proton model at 3 energy thresholds
  • Integral omnidirectional flux for the Saturn proton model at 3 energy thresholds
  • Integral intensity for the Saturn proton model at 3 sample values of L
  • Integral omnidirectional flux for the Saturn proton model at 3 sample values of L
  • Coverage of the data in magnetic field strength B and threshold energy for the electron and proton models at 3 values of L for each
• LEMMS Passbands Design, Final Version (1995)
  • MIMI/LEMMS simplified 180 degree end geometry
  • Passband plots (0 deg. end):
    • Electron passbands
    • Alpha passbands
    • Proton passbands
    • Oxygen passbands
  • Energy loss plots (0 deg. end):
    • Detector A
    • Detector D4
    • Detector B
    • Detector A vs. detector B
  • Passband plots (180 deg. end):
    • Electron passbands
    • Proton passbands
    • Alpha passbands
    • Oxygen passbands
  • Energy loss plots (180 deg. end):
    • Detector D1
    • Detector D2
    • Detector D3
    • Detector D4
    • Detector D1 vs. D2
    • Detector D2 vs. D3
    • Detector D3 vs. D4
• Cassini MIMI Team Meeting, Oct. 1997, Cape Canaveral, FL, presentation materials:
  • Imaging Saturn's dust rings using energetic neutral atoms (ENA) (15 figures; details soon)
  • Magnetic field modeling at Saturn
    • Meridian plane projection of magnetosphere field lines at 2º increments of co-latitude (solid) using the Z₃ model internal field and the ring current model
    • Equatorial field stress at Jupiter: Voyager 1
  • INCA GSFC calibrations
    • INCA start MCP, MCP gain vs. MCP voltage
    • INCA start/stop, MCP gain vs. voltage
    • INCA stop, MCP gain vs. position
    • INCA stop, MCP pulse height distributions
    • INCA start MCP, computer position
    • INCA start MCP, computer position, detail
    • INCA start MCP, computer vs. actual position
    • INCA UV interference test
    • INCA calibration sources

III. Latest LEMMS Parameters

• LEMMS parameters, 0º end, low resolution
  • Efficiency vs. incident energy, A0
  • Efficiency vs. incident energy, A1
  • Efficiency vs. incident energy, A2
  • Efficiency vs. incident energy, A3
  • Efficiency vs. incident energy, A4
  • Efficiency vs. incident energy, A5
  • Efficiency vs. incident energy, A6
  • Efficiency vs. incident energy, A7
  • Efficiency vs. incident energy, A8
  • Efficiency vs. incident energy, B0
  • Efficiency vs. incident energy, 0B
  • Efficiency vs. incident energy, B1
  • Efficiency vs. incident energy, 1B
  • Efficiency vs. incident energy, B2
  • Efficiency vs. incident energy, 2B
  • Efficiency vs. incident energy, B3
  • Efficiency vs. incident energy, 3B
  • Efficiency vs. incident energy, BE
  • Efficiency vs. incident energy, EB
  • Energy loss vs. incident energy

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Updated 7/18/08, T. Hunt-Ward
tizby@ftecs.com