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CASSINI

Cassini MIMI Investigation at Fundamental Technologies

 

 Historical MIMI Memos and Notes

 

Passband Summary

 

CHANNEL ELECTRONS
MeV		 PROTONS
MeV		 ALPHAS 
MeV/Nuc.		 CARBON 
MeV/Nuc.		 OXYGEN
MeV/Nuc.		 IRON
MeV/Nuc.
A0 0.013-0.030 0.030-0.055 <0.017 U U U
A1 0.030-0.050 0.055-0.079 0.017-0.024 <0.013 U U
A2 0.050-0.10 0.079-0.133 0.024-0.041 0.013-0.019 <0.016 U
A3 0.10-0.175 0.133-0.289 0.041-0.086 0.019-0.036 0.016-0.029 <0.014
A4 X 0.289-0.530 0.086-0.147 0.036-0.061 0.029-0.050 0.014-0.021
A5 X 0.530-0.852 0.147-0.220 0.061-0.092 0.050-0.073 0.021-0.029
A6 X 0.852-1.672 0.220-0.433 0.092-0.168 0.073-0.128 0.029-0.047
A7 X 1.672-4.012 0.433-1.276 0.168-0.463 0.128-0.354 0.047-0.120
A8 X X 1.276-4.024 0.463-7.389 0.354-8.457 0.120-10.
B0 X 3.898-7.506 22.6-31.6X X X X
B1 X 7.506-18.461 X X X X
B2 X X 3.901-5.532 7.310-7.838 X X
B3 X X 5.528-9.903 7.838-59.333 8.404-73.149 11.913-136.1
BE 0.194-2.568 X X X X X
AS 0.013-1000. 0.030-1000. X         
BS .194-1000. 3.901-1000. 3.901-1000. 7.31-1000. 8.404-1000. 11.913
D4 2.567-1000. 31.642-1000. 31.642-1000. 59.291-1000. 73.097-1000.  
DE0 0.015-0.029   X X X X
DE1 0.029-0.042   X X X X
DE2 0.042-0.055   X X X X
DE3 0.055-0.093   X X X X
DF0 0.093-0.188   X X X X
DF1 0.174-0.304   X X X X
DF2 0.304-0.527   X X X X
DF3 0.527-0.884   X X X X

 

NOTES:

 

X denotes that the response has been calculated to be NIL.
U denotes that the response is below the energy range that can be computed from the Norticliffe based range table (0.0125 MeV/nuc). The precision of the passband edges is no better than 5%. Electron responses for the A0,A1,A2,A3 channels shown in italics ignore magnetic deflection which will remove these responses in the flight instrument.

 

Absorber Stack

 

ABSORBER NAME Dead Layer A B Absorber D4
ABSORBER THICKNESSES, MICRONS 0.1 150.0 700.0 1000.0 700.0
ABSORBER MATERIAL ALUM. SILICON SILICON GOLD SILICON
THICKNESS VARIATION, MICRONS 0.0 50.0 10.0 10.0 10.0
CONICAL HALF ANGLE, DEGREES 7.5 7.5 7.5 15.0 15.0
DETECTOR NOISE, MEV       0.010 0.010
ELECTRONIC NOISE, MEV   0.006 0.010    
NUMBER OF THRESHOLDS SET 0.0 9.0 5.0 0.0 5.0
THRESHOLD LEVEL NO. MEV    1   0.012 0.100   0.100
THRESHOLD LEVEL NO. MEV    2   0.030 0.400   0.400
THRESHOLD LEVEL NO. MEV    3   0.050 1.000   1.000
THRESHOLD LEVEL NO. MEV    4   0.100 4.000   2.800
THRESHOLD LEVEL NO. MEV    5   0.250 13.000   5.000
THRESHOLD LEVEL NO. MEV    6   0.500      
THRESHOLD LEVEL NO. MEV    7   0.800      
THRESHOLD LEVEL NO. MEV    8   1.600      
THRESHOLD LEVEL NO. MEV    9   5.000      
AVERAGE PROJECTED DEPTH, MIC 0.2 150.6 703.0 1017.3 712.1
EST.RMS VARN.PROJ.DEPTH, MIC 0.0 0.6 3.0 17.6 12.3
NET RMS THICKNESS VARN. (MIC) 0.0 50.0 10.4 20.3 15.9
LOWER LIMIT THICKNESS (MIC) 0.1 100.6 692.6 997.1 696.2
UPPER LIMIT THICKNESS (MIC) 0.2 200.6 713.5 1037.6 728.0

 

 Logic Definition

 

Channel Name, Logic Logic Map
  Absorber, Level, (1=true), (-1=false)
A0 A1(A2)(B1) 2 1 1 2 2-1 3 1-1
A1 A2(A3)(B1) 2 2 1 2 3-1 3 1-1
A2 A3(A4)(B1) 2 3 1 2 4-1 3 1-1
A3 A4(A5)(B1) 2 4 1 2 5-1 3 1-1
A4 A5(A6)(B1) 2 5 1 2 6-1 3 1-1
A5 A6(A7)(B1) 2 6 1 2 7-1 3 1-1
A6 A7(A8)(B1) 2 7 1 2 8-1 3 1-1
A7 A8(A9)(B1) 2 8 1 2 9-1 3 1-1
A8 A9(B1) 2 9 1 3 1-1
B0 A8(A9)B1(B5)(D41) 2 8 1 2 9-1 3 1 1 3 5-1 5 1-1
B1 A6(A8)B4(B5)(D41) 2 6 1 2 8-1 3 4 1 3 5-1 5 1-1
B2 A9B1(B5)(D41) 2 9 1 3 1 1 3 5-1 5 1-1
B3 A9B5(D41) 2 9 1 3 5 1 5 1-1
BE A2(A7)B1(B3)(D41) 2 2 1 2 7-1 3 1 1 3 3-1 5 1-1
AS A1 2 1 1
BS B1 3 1 1
D4 D41 5 1 1

 

Passband Plots:

 

Electron Passbands Alpha Passbands
Proton Passbands Oxygen Passbands

 

Energy Loss Plots:

 

Detector A Detector D4
Detector B Detector A vs. Detector B

 

Return to Historical MIMI Notes and Memos main page.

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Return to Fundamental Technologies Home Page.



Updated 8/8/19, Cameron Crane

QUICK FACTS

Manufacturer: The Cassini spacecraft was manufactured by NASA's Jet Propulsion Laboratory, and the Huygens Probe was manufactured by Thales Alenia Space.

Mission Duration: The Cassini-Huygens mission launched on October 15 1997, and ended on September 15 2017.

Destination: Cassini's destination was Saturn and its moons. The destination of the Huygens Probe's was Saturn's moon Titan.

Orbit: Cassini orbited Saturn for 13 years before diving between its rings and colliding with the planet on September 15th, 2017.