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Ulysses HISCALE Data Analysis Handbook



4.12 Calculated Responses of HISCALE Sensors to Omnidirectionally Penetrating Cosmic Galactic Rays


Document Source: James Tappin and Dennis Haggerty


4.12.1 Numerical Simulation of HISCALE Response to Galactic Cosmic Rays


This simulation models isotropic flux through a cylindrical detector. The dimensions of the detector are: radius = 5652 mm, thickness = 200 mm. The simulation determines the distance traveled in the detector for each randomly entering particle. For clarity the results have been placed in three separate categories. They are:


Case 1 - Top entering particles leaving through the detector side.
Case 2 - Top entering particles leaving through the bottom.
Case 3 - Side entering particles leaving through a side.


The energy deposition due to these particles can be determined by the equation:


Energy = 0.466 keV/Micron * Penetration distance


The slope of the graph is approximately 3.

Figure 4.84 Cosmic ray case 2 (top) and case 3 (side)


Figure 4.84



Figure 4.85 Cosmic ray case 1 (oblique) and total


Figure 4.85



Figure 4.86 Calculations of penetration geometry, part I 


Figure 4.86a tan g=L/T
L=T tan g


Figure 4.86 A=L cos q
B=L sin q

A=T tan g cos q
B=T tan g sin



  If r' > r             case 1
Else r' <= r      case 2



Figure 4.87 Calculations of penetration geometry, part II


CASE 1: Projection through side

Figure 4.87
Eq 1
Eq 3
Eq 4
Eq 5
Eq 2

Eq 6
Figure 4.87a Eq 7
Eq 8


CASE 2: Projection through bottom

Figure 4.87b

Eq 9



Next: 4.13 Summary of HISCALE 4-pi Viewing and Sectoring Relationships


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Updated 1/2/19, Cameron Crane


Manufacturer: ESA provided the Ulysses spacecraft, NASA provided the power supply, and various others provided its instruments.

Mission End Date: June 30, 2009

Destination: The inner heliosphere of the sun away from the ecliptic plane

Orbit:  Elliptical orbit transversing the polar regions of the sun outside of the ecliptic plane