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Preliminary SpaceCharge & GridLeak at low luminosity in Run 14
Updated on Fri, 2014-10-17 15:17. Originally created by genevb on 2014-10-15 11:05.
This page has been created in the context of a TPC group discussion.
Using the initial asymmetric SpaceCharge & GridLeak distortion corrections calibrated during Run 14 and applying them to one of the "low luminosity" runs, 15100090, yields the following distortion correction maps, from GL = 10.11, sc = 0.00431, ewratio = 1.127 (so sceast = 0.00486):
notes: all units [cm], plots can be seen larger by opening individual images in a separate browser window/tab
And then the same plots again, but this time assuming luminosity → 0, showing the effect of the luminosity offset leading to sc = 0.00066 (sceast = 0.00074):
Discussions also led us to discuss the Padrow 13 correction, which is shown here (it is independent of luminosity):
-Gene
Using the initial asymmetric SpaceCharge & GridLeak distortion corrections calibrated during Run 14 and applying them to one of the "low luminosity" runs, 15100090, yields the following distortion correction maps, from GL = 10.11, sc = 0.00431, ewratio = 1.127 (so sceast = 0.00486):
notes: all units [cm], plots can be seen larger by opening individual images in a separate browser window/tab
| Correction | Δ(rφ) vs. r and z | Δ(r) vs. r and z |
|---|---|---|
| SpaceCharge |  |
 |
| GridLeak |  |
 |
| SpaceCharge + GridLeak |
 |
 |
And then the same plots again, but this time assuming luminosity → 0, showing the effect of the luminosity offset leading to sc = 0.00066 (sceast = 0.00074):
| Correction | Δ(rφ) vs. r and z | Δ(r) vs. r and z |
|---|---|---|
| SpaceCharge |  |
 |
| GridLeak |  |
 |
| SpaceCharge + GridLeak |
 |
 |
Discussions also led us to discuss the Padrow 13 correction, which is shown here (it is independent of luminosity):
-Gene
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