Difference between revisions of "20200601-Optics-Mtg"
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#Ryan: | #Ryan: | ||
#* verifying the PREX database | #* verifying the PREX database | ||
| + | |||
| + | == Minutes == | ||
| + | #Ryan: Residuals from L/R HRS | ||
| + | #* theta and phi look better, but still have some systematic offset. | ||
| + | #** Siyu thinks this is a bug or incompleteness of the residual script and will contact Ryan about how to fix it. | ||
| + | #** Kent suggests that the angle be calculated by the survey to compare to the predicted value by hand, for a couple of holes, to prove we are doing it right. | ||
| + | #* dp looks systematically wrong, with phi dependence and a theta dependence to the residual. | ||
| + | #** Siyu thinks this might be a data base not fully optimized. | ||
| + | #** Ryan will get the script to output the expected value for dp for each hole, to see if the problem is database outputting bad data or the residual program mis-calculating the expected value | ||
| + | #* there is a separate problem of fits for some holes not converging or returning junk. This requires diagnoses, and perhaps easier tools to review the fits for each hole in theta, phi, dp. | ||
| + | # Siyu is looking at the fit from water cell runs | ||
| + | #* he looks at the difference in momentum between the G.S. and first excited state. He also looks at dp for the individual peaks. | ||
| + | #* cutting the data into small bits over the long run, he sees a shift between the beginning and end of the run on the dp of the individual peaks. | ||
| + | #** This _might_ be related to the drift in energy over run, which can be tracked using the energy monitor readback. This is still to be confirmed. | ||
| + | #* he has also made progress on looking at all holes and comparing results over the sieve pattern. This is complicated by a difference in rates (and therefore, a difference in statistics or in time over which the averaging is done). | ||
== Attendence == | == Attendence == | ||
| + | Ryan, Siyu, Devi, Dustin, Chandan, Nilanga, Bob, Kent | ||
Revision as of 15:26, 1 June 2020
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Logistic information
Toll-Free Number (U.S.& Canada): 888-240-2560 PARTICIPANT CODE: # 585 129 220 Room IRL: <none>
Agenda
Please post slides in haplog or docdb, before the meeting
- Siyu
- Watercell precision and systematics
- comparing central value +/- error for various sieve holes and measurements.
- Ryan:
- verifying the PREX database
Minutes
- Ryan: Residuals from L/R HRS
- theta and phi look better, but still have some systematic offset.
- Siyu thinks this is a bug or incompleteness of the residual script and will contact Ryan about how to fix it.
- Kent suggests that the angle be calculated by the survey to compare to the predicted value by hand, for a couple of holes, to prove we are doing it right.
- dp looks systematically wrong, with phi dependence and a theta dependence to the residual.
- Siyu thinks this might be a data base not fully optimized.
- Ryan will get the script to output the expected value for dp for each hole, to see if the problem is database outputting bad data or the residual program mis-calculating the expected value
- there is a separate problem of fits for some holes not converging or returning junk. This requires diagnoses, and perhaps easier tools to review the fits for each hole in theta, phi, dp.
- theta and phi look better, but still have some systematic offset.
- Siyu is looking at the fit from water cell runs
- he looks at the difference in momentum between the G.S. and first excited state. He also looks at dp for the individual peaks.
- cutting the data into small bits over the long run, he sees a shift between the beginning and end of the run on the dp of the individual peaks.
- This _might_ be related to the drift in energy over run, which can be tracked using the energy monitor readback. This is still to be confirmed.
- he has also made progress on looking at all holes and comparing results over the sieve pattern. This is complicated by a difference in rates (and therefore, a difference in statistics or in time over which the averaging is done).
Attendence
Ryan, Siyu, Devi, Dustin, Chandan, Nilanga, Bob, Kent
