Difference between revisions of "Back of the envelope calculation for e+/e- ratio"
Jump to navigation
Jump to search
(Created page with " {| border="1" |cellpadding="20" cellspacing="0 |- | run# || T1 || T2 || Sweep Magnet|| logic || HV-D2L || HV-D1R || Reprate || start || stop || Int Rate || event number || …") |
|||
| (3 intermediate revisions by the same user not shown) | |||
| Line 34: | Line 34: | ||
= e+ to e- ratio = | = e+ to e- ratio = | ||
| − | e+ / e-= <math>\frac{4.2 \times 10^{-17}~C} {9~mC}= 4.2 \times 10^{-17}} {9 \times 10^{-3}} = 0.5 \times 10^{-14} | + | e+ / e-= <math>\frac{4.2 \times 10^{-17}~C} {9~mC}</math> |
| + | |||
| + | <math>= \frac {4.2 \times 10^{-17}} {9 \times 10^{-3}}</math> | ||
| + | |||
| + | <math> = 0.5 \times 10^{-14} </math> | ||
| + | |||
| + | <math>= 5 \times 10^{-15} </math> | ||
Latest revision as of 23:47, 8 April 2013
| run# | T1 | T2 | Sweep Magnet | logic | HV-D2L | HV-D1R | Reprate | start | stop | Int Rate | event number | pulses |
| 3735 | in | in | out | (DL & GunTrig) & (DR & GunTrig) | 1150V | 1150V | 300-301 | 15:54:24 | 16:11:06 (1002 s) | 9.0200 events/s | 9045 | 301462 |
| 3736 | in | out | out | (DL & GunTrig) & (DR & GunTrig) | 1150V | 1150V | 300-301 | 16:12:15 | 16:27:07 (892 s) | 4.1736 events/s | 3752 | 268289 |
Run 3735 positron charge
positron rates is 0.26 Hz.
Run times is 1002.
The total positron in this run is 260.
The current of the positron beam is: C.
Run 3735 electron charge
The electron peak current is around 100 mA.
The pulse width is: 300 ns.
Then current in a single pulse is: 300 ns * 100 mA = 30 nC.
The total pulses in this run are: 301462
Then the total charge is this run: 30 nC * 300,000 = 9 mC.
e+ to e- ratio
e+ / e-=