Dose Calculation

Dose (C/cm):

${\frac {\#e}{1cm}}\times 1.60\cdot 10^{{-19}}C/e\times gasgain$

• Lamina 300 A:

    $3.6\cdot 10^{{11}}\times 1.6\cdot 10^{{-19}}\times 2\cdot 10^{{5}}=0.01~C/cm$

• Lamina 12 $\mu$m:

    $1.2\cdot 10^{{11}}\times 1.6\cdot 10^{{-19}}\times 2\cdot 10^{{5}}=0.004~C/cm$

• CMU mylar:

    $1.4\cdot 10^{{11}}\times 1.6\cdot 10^{{-19}}\times 2\cdot 10^{{5}}=0.004~C/cm$

• CMU kapton:

    $2.9\cdot 10^{{11}}\times 1.6\cdot 10^{{-19}}\times 2\cdot 10^{{5}}=0.009~C/cm$

EM background: $40~kHz/straw$or $267~Hz/cm$

• 1 year of running (= 1/3 year beam on target) = $1.1\cdot 10^{{7}}s\times 267{\frac {e}{s\cdot cm}}\times 1.60\cdot 10^{{-19}}C/e\times 2\cdot 10^{{5}}=9.0\cdot 10^{{-5}}C/cm$

• Irradiation dose = $\geq$44 years of running