Cryo-target wall contamination
From Hall A Wiki
The normalized yield is equal to Ngood/Q/density. Here I neglected the density of the 3He gas.
Kinematic 5.2
| Target | window thickness | Total charge | # of good evts | |
|---|---|---|---|---|
| upstream | downstream | |||
| He3 | 0.0274 cm | 0.0328 cm | 6.92E+8 | 253254 |
| Dummy | 0.1581 cm | 0.1585 cm | 2.16E+8 | 3588 |
Result: An estimate of 2186 events wall events remains within the cut ==> Contamination is less than 1%.
Kinematic 6.5
| Target | window thickness | Total charge | # of good evts | |
|---|---|---|---|---|
| upstream | downstream | |||
| He3 | 0.0274 cm | 0.0328 cm | 1.045E+9 | 110050 |
| Dummy | 0.1581 cm | 0.1585 cm | 1.316E+7 | 294 |
Result: An estimate of 4439 events wall events remains within the cut ==> Contamination is 4%.
