Dose Calculation

(Difference between revisions)

Revision as of 20:18, 5 November 2009

Dose (C/cm):

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

$3.6\cdot10^{11}\times1.6\cdot10^{-19}\times2\cdot10^{5} = 0.01~C/cm$

$1.2\cdot10^{11}\times1.6\cdot10^{-19}\times2\cdot10^{5} = 0.004~C/cm$

$1.4\cdot10^{11}\times1.6\cdot10^{-19}\times2\cdot10^{5} = 0.004~C/cm$

$2.9\cdot10^{11}\times1.6\cdot10^{-19}\times2\cdot10^{5} = 0.009~C/cm$

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

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

 * CMU kapton:
 <math>2.9\cdot10^{11}\times1.6\cdot10^{-19}\times2\cdot10^{5} = 0.009~C/cm</math>
+EM background: 40<math>~kHz</math>/straw or 267<math>~Hz</math>/cm
+* 1 year of running (= 1/3 year beam on target) = <math>1.1\cdot 10^{7}s \times 267 e/s\cdot cm \times 2\cdot 10^{5} = 9.0 \cdot 10^{-5} C/cm</math>