Plotting SIS intensities
Energy bands for each of the SIS instrumental ranges are given for all level 2 elements in the table below, and also in tab-delimited text format.� The appropriate energy at which to plot the reported intensities depends on the particle spectra.� However, the �bow-tie� analysis (e.g., Van Allen et al., JGR 79, 3559, 1974) is a method of characterizing an instrument response by a geometry factor x DE (referred to as <G>) and a representative energy,� <E>, which are approximately independent of the spectral index of the incident particle population.� This allows one to calculate the particle intensity (for a given energy range) and plot it at an appropriate energy (<E>) without a priori knowledge of the incident spectrum.
Bow-tie analysis of the SIS response results in the values of <G> and <E> as given in the table below for each instrumental range and level 2 element (also given are the geometry factors and energy bands as used in the current level 2 processing).� As the reported intensities are not calculated using this method, a normalization factor (ABT) must be multiplied by the intensities in order to utilize the bow-tie analysis.� For example, one would multiply the reported range-0 He intensities by a factor of 1.13 and plot the result at an energy value of 4.32.
More information regarding the bow-tie analysis can be found in this SIS memo.� Questions regarding this analysis should be directed to Christina Cohen.
GF (cm2 sr) |
Emin (MeV/n) |
Emax (MeV/n) |
<G> (cm2 sr MeV/n) |
<E> (MeV/n) |
ABT |
|
|
Helium |
|||||
0 |
42.8 |
3.43 |
4.74 |
49.58 � 1.67 |
4.32 � 0.036 |
1.131 � 0.038 |
1 |
42.8 |
4.74 |
6.13 |
65.71 � 2.30 |
5.62 � 0.049 |
0.905 � 0.032 |
2 |
41.2 |
6.13 |
7.29 |
53.90 � 1.09 |
7.01 � 0.035 |
0.887 � 0.018 |
3 |
41.2 |
7.29 |
9.72 |
108.5 � 4.07 |
8.84 � 0.083 |
0.923 � 0.035 |
4 |
39.0 |
9.72 |
13.59 |
154.8 � 6.63 |
11.9 � 0.13 |
0.975 � 0.042 |
5 |
37.6 |
13.59 |
17.96 |
179.1 � 6.21 |
16.1 � 0.14 |
0.918 � 0.032 |
6 |
32.2 |
17.96 |
29.35 |
401.5 � 35.5 |
23.5 � 0.52 |
0.913 � 0.081 |
7 |
24.6 |
29.35 |
41.19 |
297.7 � 12.3 |
35.1 � 0.36 |
0.978 � 0.040 |
|
Carbon |
|||||
0 |
42.8 |
6.12 |
8.62 |
114.4 � 5.90 |
7.56 � 0.097 |
0.821 � 0.042 |
1 |
42.8 |
8.62 |
11.23 |
124.0 � 4.58 |
10.3 � 0.095 |
0.901 � 0.033 |
2 |
41.2 |
11.23 |
13.40 |
102.0 � 2.16 |
12.9 � 0.068 |
0.876 � 0.019 |
3 |
41.2 |
13.40 |
17.94 |
198.7 � 7.39 |
16.3 � 0.15 |
0.941 � 0.035 |
4 |
39.0 |
17.94 |
25.12 |
287.7 � 12.5 |
22.0 � 0.24 |
0.973 � 0.042 |
5 |
37.6 |
25.12 |
33.21 |
325.3 � 11.2 |
29.7 � 0.25 |
0.935 � 0.032 |
6 |
32.2 |
33.21 |
54.30 |
745.2 � 66.7 |
43.3 � 0.97 |
0.911 � 0.082 |
7 |
24.6 |
54.30 |
76.34 |
560.2 � 23.7 |
64.9 � 0.69 |
0.968 � 0.041 |
|
Nitrogen |
|||||
0 |
42.8 |
6.61 |
9.33 |
125.5 � 6.68 |
8.16 � 0.11 |
0.837 � 0.045 |
1 |
42.8 |
9.33 |
12.18 |
136.1 � 5.14 |
11.1 � 0.11 |
0.896 � 0.034 |
2 |
41.2 |
12.18 |
14.56 |
110.7 � 2.35 |
14.0 � 0.074 |
0.886 � 0.019 |
3 |
41.2 |
14.56 |
19.51 |
216.7 � 8.17 |
17.7 � 0.17 |
0.941 � 0.035 |
4 |
39.0 |
19.51 |
27.34 |
314.9 � 13.9 |
23.9 � 0.26 |
0.970 � 0.043 |
5 |
37.6 |
27.34 |
36.17 |
356.2 � 12.2 |
32.3 � 0.28 |
0.932 � 0.032 |
6 |
32.2 |
36.17 |
59.19 |
808.7 � 71.8 |
47.2 � 1.05 |
0.917 � 0.081 |
7 |
24.6 |
59.19 |
83.26 |
611.5 � 26.2 |
70.7 � 0.76 |
0.968 � 0.041 |
|
Oxygen |
|||||
0 |
42.8 |
7.05 |
9.99 |
136.7 � 7.56 |
8.71 � 0.12 |
0.843 � 0.047 |
1 |
42.8 |
9.99 |
13.07 |
146.6 � 5.59 |
11.9 � 0.11 |
0.899 � 0.034 |
2 |
41.2 |
13.07 |
15.63 |
119.7 � 2.59 |
15.0 � 0.081 |
0.881 � 0.019 |
3 |
41.2 |
15.63 |
20.97 |
234.0 � 8.90 |
19.0 � 0.18 |
0.940 � 0.036 |
4 |
39.0 |
20.97 |
29.42 |
339.7 � 15.1 |
25.7 � 0.28 |
0.970 � 0.043 |
5 |
37.6 |
29.42 |
38.94 |
383.5 � 13.2 |
34.8 � 0.30 |
0.933 � 0.032 |
6 |
32.2 |
38.94 |
63.77 |
873.3 � 78.0 |
50.8 � 1.14 |
0.916 � 0.082 |
7 |
24.6 |
63.77 |
89.78 |
661.1 � 28.5 |
76.2 � 0.82 |
0.968 � 0.042 |
|
Neon |
|||||
0 |
42.8 |
7.82 |
11.15 |
155.7 � 9.02 |
9.68 � 0.14 |
0.851 � 0.049 |
1 |
42.8 |
11.15 |
14.64 |
166.6 � 6.59 |
13.3 � 0.13 |
0.897 � 0.035 |
2 |
41.2 |
14.64 |
17.56 |
136.6 � 3.05 |
16.8 � 0.094 |
0.881 � 0.020 |
3 |
41.2 |
17.56 |
23.62 |
265.5 � 10.3 |
21.4 � 0.21 |
0.940 � 0.036 |
4 |
39.0 |
23.62 |
33.22 |
385.9 � 17.4 |
29.0 � 0.33 |
0.970 � 0.044 |
5 |
37.6 |
33.22 |
44.02 |
435.0 � 15.1 |
39.3 � 0.34 |
0.934 � 0.032 |
6 |
32.2 |
44.02 |
72.24 |
995.3 � 90.0 |
57.5 � 1.30 |
0.913 � 0.083 |
7 |
24.6 |
72.24 |
101.83 |
754.9 � 32.7 |
86.4 � 0.94 |
0.964 � 0.042 |
|
Magnesium |
|||||
0 |
42.8 |
8.47 |
12.16 |
173.1 � 10.4 |
10.5 � 0.16 |
0.860 � 0.052 |
1 |
42.8 |
12.16 |
16.03 |
185.0 � 7.51 |
14.6 � 0.15 |
0.895 � 0.036 |
2 |
41.2 |
16.03 |
19.26 |
151.2 � 3.40 |
18.5 � 0.10 |
0.880 � 0.020 |
3 |
41.2 |
19.26 |
25.99 |
294.6 � 11.6 |
23.5 � 0.23 |
0.941 � 0.037 |
4 |
39.0 |
25.99 |
36.64 |
428.2 � 19.5 |
31.9 � 0.36 |
0.970 � 0.044 |
5 |
37.6 |
36.64 |
48.63 |
482.8 � 17.0 |
43.4 � 0.38 |
0.934 � 0.033 |
6 |
32.2 |
48.63 |
79.97 |
1109. � 101. |
63.6 � 1.45 |
0.910 � 0.083 |
7 |
24.6 |
79.97 |
112.90 |
835.5 � 36.1 |
95.8 � 1.03 |
0.970 � 0.042 |
|
Silicon |
|||||
0 |
42.8 |
9.03 |
13.04 |
189.9 � 12.0 |
11.2 � 0.18 |
0.863 � 0.054 |
1 |
42.8 |
13.04 |
17.26 |
201.5 � 8.36 |
15.7 � 0.16 |
0.897 � 0.037 |
2 |
41.2 |
17.26 |
20.79 |
165.3 � 3.85 |
19.9 � 0.12 |
0.880 � 0.020 |
3 |
41.2 |
20.79 |
28.13 |
323.2 � 13.0 |
25.4 � 0.26 |
0.936 � 0.038 |
4 |
39.0 |
28.13 |
39.76 |
467.6 � 21.5 |
34.6 � 0.40 |
0.970 � 0.045 |
5 |
37.6 |
39.76 |
52.87 |
528.6 � 18.8 |
47.1 � 0.42 |
0.933 � 0.033 |
6 |
32.2 |
52.87 |
87.14 |
1208. � 111. |
69.2 � 1.59 |
0.913 � 0.084 |
7 |
24.6 |
87.14 |
123.20 |
921.5 � 40.9 |
104. � 1.16 |
0.963 � 0.043 |
|
Sulfur |
|||||
0 |
42.8 |
9.51 |
13.83 |
204.8 � 13.5 |
11.9 � 0.19 |
0.863 � 0.057 |
1 |
42.8 |
13.83 |
18.37 |
218.8 � 9.45 |
16.6 � 0.18 |
0.888 � 0.038 |
2 |
41.2 |
18.37 |
22.17 |
178.1 � 4.15 |
21.2 � 0.12 |
0.879 � 0.020 |
3 |
41.2 |
22.17 |
30.10 |
347.4 � 14.1 |
27.1 � 0.28 |
0.941 � 0.038 |
4 |
39.0 |
30.10 |
42.66 |
505.7 � 23.8 |
37.1 � 0.44 |
0.969 � 0.045 |
5 |
37.6 |
42.66 |
56.81 |
570.8 � 20.6 |
50.6 � 0.46 |
0.932 � 0.034 |
6 |
32.2 |
56.81 |
93.85 |
1308. � 121. |
74.4 � 1.73 |
0.912 � 0.085 |
7 |
24.6 |
93.85 |
132.90 |
1001. � 44.8 |
113. � 1.26 |
0.960 � 0.043 |
|
Iron |
|||||
0 |
42.8 |
10.47 |
15.83 |
258.5 � 20.6 |
13.3 � 0.27 |
0.853 � 0.068 |
1 |
42.8 |
15.83 |
21.53 |
273.8 � 13.5 |
19.3 � 0.24 |
0.891 � 0.044 |
2 |
41.2 |
21.53 |
26.30 |
225.0 � 5.96 |
25.1 � 0.17 |
0.873 � 0.023 |
3 |
41.2 |
26.30 |
36.31 |
440.2 � 19.9 |
32.5 � 0.37 |
0.937 � 0.042 |
4 |
39.0 |
36.31 |
52.22 |
645.3 � 32.9 |
45.1 � 0.58 |
0.962 � 0.049 |
5 |
37.6 |
52.22 |
70.23 |
724.6 � 27.6 |
62.3 � 0.59 |
0.935 � 0.036 |
6 |
32.2 |
70.23 |
117.53 |
1684. � 165. |
92.7 � 2.27 |
0.904 � 0.089 |
7 |
24.6 |
117.53 |
167.66 |
1275. � 58.5 |
141. � 1.62 |
0.967 � 0.044 |