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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
q

 

 

  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

 

Return to Chapter 4 Table of Contents

Return to Ulysses HISCALE Data Analysis Handbook Table of Contents


Updated 1/2/19, Cameron Crane

QUICK FACTS

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