Proceedings of Topical Meeting on Optoinformatics (pdf-format, 1.21 ...

28 OPTOINFORMATICS’05
Table. Calculation <strong>of</strong> summary errors depending on loading <strong>of</strong> the SSP registering tracts
Intensity <strong>of</strong> SR Counting rate, Probability Probability
beam I, photon/sec pulses/sec <strong>of</strong> OEE, Р(1) <strong>of</strong> TEE, Р(2) P(1)/P(2) Apparatus Statistical Summary
error, % error, % error, %
10 4 10 0 10 -6 5⋅10 -13 2⋅10 6 100 5⋅10 -5 100
10 5 10 1 10 -5 5⋅10 -11 2⋅10 5 31,6 5⋅10 -4 31,6
10 6 10 2 10 -4 5⋅10 -9 2⋅10 4 10 5⋅10 -3 10
10 7 10 3 10 -3 5⋅10 -7 2⋅10 3 3,2 5⋅10 -2 3,2
10 8 10 4 9,9⋅10 -3 4,95⋅10 -5 2⋅10 2 1 5⋅10 -1 1,1
10 9 10 5 9⋅10 -2 4,52⋅10 -3 2⋅10 1 0,3 5⋅10 0 5
10 10 10 6 3,68⋅10 -1 1,84⋅10 -1 2⋅10 0 0,1 5⋅10 1 50
Figure. The functional dependences <strong>of</strong> apparatus, statistical and summary errors from counting rate
<strong>of</strong> output signal (i.e. level <strong>of</strong> loading <strong>of</strong> the SSP registering channels)
2 2
The summary error σ sum is evaluated the following way: σ
sum
= σ app + σ . The
stat
calculated values <strong>of</strong> apparatus, statistical and summary errors, depending on the level <strong>of</strong>
loading <strong>of</strong> the registering channel, are given in the table. So, the figure clearly
demonstrates character <strong>of</strong> these errors. The figure shows, that the minimum summary error
<strong>of</strong> measurements (and consequently, the most exact measurements at the SSP calibration)
can be obtained at the counting rate 10 4 pulses/sec, that requires to set the SR beam
intensity from the VEPP-4 storage ring about 10 8 photon/sec (see, table).
Acknowledgments. This work has been supported by the grant <strong>of</strong> International
Science and Technology Center through the Project #2500 «Calibration <strong>of</strong> the Space Solar
Patrol apparatus at the synchrotron source». The author is grateful to pr<strong>of</strong>. S.V. Avakyan
and collegues: Mironov A.I., Chernikov D.A. and Zotkin I.A.
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