Difference between revisions of "Number of electron-positron pairs/sec out of Al converte"
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<math>\frac {1.12 \cdot 10^{8} \frac{\gamma}{sec} \times \sigma_{pairs} \times N_{Al}} {f} = 2.96\ \frac{pairs}{pulse} </math> | <math>\frac {1.12 \cdot 10^{8} \frac{\gamma}{sec} \times \sigma_{pairs} \times N_{Al}} {f} = 2.96\ \frac{pairs}{pulse} </math> | ||
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+ | ==Appendix== | ||
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+ | ===pair production cross sections in an Al target=== | ||
+ | |||
+ | [[File:pair_production_Al.png | 400 px]] | ||
+ | |||
+ | ===pair production cross sections in N=== | ||
+ | |||
+ | [[File:pair_prodiction_nitrogen.png | 400 px]] | ||
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+ | |||
+ | |||
+ | [http://wiki.iac.isu.edu/index.php/PhotoFission_with_Polarized_Photons_from_HRRL Go Back] |
Revision as of 07:22, 29 January 2011
LINAC parameters used in calculations
1) pulse width 50 ps
2) pulse current 50 A
3) repetition rate 300 Hz
4) energy 44 MeV
Number of electrons/sec on radiator
Number of photons/sec out of radiator
Alex factor is 6.85 %
Pair production rate
out of Al converter
(by varying width we can vary the yield)
through 1 m of air
Appendix
pair production cross sections in an Al target
pair production cross sections in N