Difference between revisions of "Cryo-target wall contamination"
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(New page: == Kinematic 5.2 == The normalized yield is equal to Ngood/Q/density. Image:he3_5.2_all.gif [Image:dummy_5.2_all.gif]]) |
(→Kinematic 6.5) |
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| + | The normalized yield is equal to Ngood/Q/density. Here I neglected the density of the 3He gas. | ||
| + | |||
| + | |||
== Kinematic 5.2 == | == Kinematic 5.2 == | ||
| − | |||
| + | {| border="1" cellpadding="2" | ||
| + | |- | ||
| + | ! Target | ||
| + | ! colspan="2" | 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%. | ||
[[Image:he3_5.2_all.gif]] | [[Image:he3_5.2_all.gif]] | ||
| − | [Image:dummy_5.2_all.gif]] | + | |
| + | [[Image:dummy_5.2_all.gif]] | ||
| + | |||
| + | |||
| + | == Kinematic 6.5 == | ||
| + | |||
| + | |||
| + | {| border="1" cellpadding="2" | ||
| + | |- | ||
| + | ! Target | ||
| + | ! colspan="2" | 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%. | ||
| + | |||
| + | |||
| + | [[Image:he3_6.5_all.gif]] | ||
| + | |||
| + | [[Image:dummy_6.5_all.gif]] | ||
| + | |||
| + | |||
| + | * With the full statistic collected till run 4039 (the last plot has the dummy histo multiply by 30) and the following cuts were applied to 3He and dummy runs: | ||
| + | |||
| + | - sprintf(cutnom,"L.tr.n==1 && DBB.edtpr[0]==0 && (DBB.evtypebits>>3)&1"); | ||
| + | - sprintf(cutdum_y,"abs(L.tr.tg_y-0.0025)<0.030"); or sprintf(cuthe_y,"abs(L.tr.tg_y)<0.030"); | ||
| + | - sprintf(cutphi,"abs(L.tr.tg_ph)<0.020"); | ||
| + | - sprintf(cuttheta,"abs(L.tr.tg_th)<0.040"); | ||
| + | - sprintf(cutcer,"L.cer.asum_c>300 && L.cer.asum_c<8000"); | ||
| + | - sprintf(cutcalo,"(L.prl1.asum_c+L.prl2.asum_c)>1000"); | ||
| + | - sprintf(cutdum_all,"%s && %s && %s && %s && %s && %s", cutnom, cutdum_y, cutphi, cuttheta, cutcer, cutcalo); or sprintf(cuthe_all,"%s && %s && %s && %s && %s && %s", cutnom, cuthe_y, cutphi, cuttheta, cutcer, cutcalo); | ||
| + | |||
| + | [[Image:dummycont_6.5.gif]] | ||
Latest revision as of 15:18, 1 May 2011
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%.
- With the full statistic collected till run 4039 (the last plot has the dummy histo multiply by 30) and the following cuts were applied to 3He and dummy runs:
- sprintf(cutnom,"L.tr.n==1 && DBB.edtpr[0]==0 && (DBB.evtypebits>>3)&1"); - sprintf(cutdum_y,"abs(L.tr.tg_y-0.0025)<0.030"); or sprintf(cuthe_y,"abs(L.tr.tg_y)<0.030"); - sprintf(cutphi,"abs(L.tr.tg_ph)<0.020"); - sprintf(cuttheta,"abs(L.tr.tg_th)<0.040"); - sprintf(cutcer,"L.cer.asum_c>300 && L.cer.asum_c<8000"); - sprintf(cutcalo,"(L.prl1.asum_c+L.prl2.asum_c)>1000"); - sprintf(cutdum_all,"%s && %s && %s && %s && %s && %s", cutnom, cutdum_y, cutphi, cuttheta, cutcer, cutcalo); or sprintf(cuthe_all,"%s && %s && %s && %s && %s && %s", cutnom, cuthe_y, cutphi, cuttheta, cutcer, cutcalo);
