 |
|
|
CCD Response
Mean CCD Counts
vs. Exposure Time
Exposure
Time (s) |
256 x 256
pixels |
1024 x 1024
pixels |
| 0.05 |
354 |
298 |
| 0.10 |
746 |
617 |
| 0.20 |
1,521 |
1,296 |
| 0.40 |
3,058 |
2,630 |
| 0.60 |
4,619 |
4,017 |
| 0.80 |
6,170 |
5,380 |
| 1.00 |
7,723 |
6,769 |
| 1.20 |
9,283 |
- |
| 1.40 |
10,849 |
- |
| 1.60 |
12,409 |
10,958 |
| 1.80 |
13,971 |
- |
| 2.00 |
14,820 |
13,689 |
| 2.10 |
14,907 |
- |
| 2.20 |
14,940 |
14,469 |
| 2.40 |
- |
14,500 |
DOSE TABLE FOR EMAC TOMOGRAPHY - 11/28/2001 hewz
| MAG=27500 |
PIXEL:6.544 |
PIXELSQ:42.82 |
TARGET: |
2248 |
4496 |
| ----------- |
------------- |
----------- |
-------------- |
------------- |
---------- |
| DISP_EXP(s) |
counts/pixel |
counts/A-2 |
electron/A-2 |
5e/A-2(s) |
10e/A-2(s) |
| 1 |
6227.1 |
145.41 |
13.8 |
0.36 |
0.72 |
| 1.08 |
5558.6 |
129.8 |
12.36 |
0.4 |
0.81 |
| 1.17 |
5151.8 |
120.3 |
11.46 |
0.44 |
0.87 |
| 1.26 |
4767.4 |
111.33 |
10.6 |
0.47 |
0.94 |
| 1.36 |
4207.4 |
98.25 |
9.35 |
0.53 |
1.07 |
| 1.47 |
3923.4 |
91.62 |
8.73 |
0.57 |
1.15 |
| 1.59 |
3718.7 |
86.84 |
8.27 |
0.6 |
1.21 |
| 1.72 |
3555.7 |
83 |
7.9 |
0.63 |
1.27 |
| 2 |
3215.8 |
75.1 |
7.15 |
0.7 |
1.4 |
| ----------- |
------------- |
----------- |
-------------- |
------------- |
---------- |
| MAG=20000 |
PIXEL:8.914 |
PIXELSQ:79.46 |
TARGET: |
4172 |
8343 |
| ----------- |
------------- |
----------- |
-------------- |
------------- |
---------- |
| DISP_EXP(s) |
counts/pixel |
counts/A-2 |
electron/A-2 |
5e/A-2(s) |
10e/A-2(s) |
| 0.93 |
6310.4 |
79.41 |
7.56 |
0.66 |
1.32 |
| 1 |
6265.7 |
78.85 |
7.5 |
0.67 |
1.33 |
| 1.08 |
5675.9 |
71.43 |
6.8 |
0.74 |
1.47 |
| 1.17 |
5138.2 |
64.66 |
6.16 |
0.81 |
1.62 |
| 1.26 |
4538.7 |
57.12 |
5.44 |
0.92 |
1.84 |
| 1.36 |
4261.5 |
53.63 |
5.11 |
0.98 |
1.96 |
| 1.47 |
3936 |
49.53 |
4.7 |
1.06 |
2.12 |
| ----------- |
------------- |
----------- |
-------------- |
------------- |
---------- |
| |
|
|
|
|
|
| MAG=15000 |
PIXEL:11.97 |
PIXELSQ:143.28 |
TARGET: |
7522 |
15044 |
| ----------- |
------------- |
----------- |
-------------- |
------------- |
---------- |
| DISP_EXP(s) |
counts/pixel |
counts/A-2 |
electron/A-2 |
5e/A-2(s) |
10e/A-2(s) |
| 1 |
6059.6 |
42.29 |
4.03 |
1.24 |
2.48 |
| 1.08 |
5645.2 |
39.4 |
3.75 |
1.33 |
2.67 |
| 1.17 |
5356.8 |
37.4 |
3.56 |
1.4 |
2.81 |
| 1.26 |
4634 |
32.34 |
3.08 |
1.62 |
3.25 |
| 1.36 |
4361.5 |
30.44 |
2.9 |
1.72 |
3.45 |
| 1.47 |
3971.7 |
27.72 |
2.64 |
1.89 |
3.79 |
| ----------- |
------------- |
----------- |
-------------- |
------------- |
---------- |
| |
|
|
|
|
|
| MAG=11500 |
PIXEL:15.67 |
PIXELSQ:245.55 |
TARGET: |
12891 |
25783 |
| ----------- |
------------- |
----------- |
-------------- |
------------- |
---------- |
| DISP_EXP(s) |
counts/pixel |
counts/A-2 |
electron/A-2 |
5e/A-2(s) |
10e/A-2(s) |
| 0.93 |
6621.3 |
26.93 |
2.57 |
1.95 |
3.89 |
| 1 |
6067.5 |
24.71 |
2.35 |
2.13 |
4.26 |
| 1.08 |
5525.4 |
22.5 |
2.14 |
2.34 |
4.67 |
| 1.17 |
5082.8 |
20.7 |
1.97 |
2.54 |
5.08 |
| 1.26 |
4886.9 |
19.9 |
1.9 |
2.63 |
5.26 |
| 1.36 |
4331.4 |
17.64 |
1.68 |
2.98 |
5.95 |
| 1.47 |
4060 |
16.53 |
1.57 |
3.18 |
6.37 |
| 1.59 |
3680.6 |
14.99 |
1.43 |
3.5 |
7 |
| ----------- |
------------- |
----------- |
-------------- |
------------- |
---------- |
NOTES:
1) SPOTSIZE=3 C1=4 C2=3 EXTRACTION=4.09KV VOLT=200KV EXPOSURE=1.0s
2) conversion efficency: 10.5 counts per electron
3) TARGET is the counts per pixel for dose 5e/A-2(s) or 10e/A-2(s).
User can convert it to any other dose, e.g.: 1e/A-2(s)
|
|
|
|
