Difference between revisions of "Useful optics info"
| Line 17: | Line 17: | ||
** Aug 11: newer version with the raster sign flip issue fixed https://hallcweb.jlab.org/elogs/X%3E1+%26+EMC/249 | ** Aug 11: newer version with the raster sign flip issue fixed https://hallcweb.jlab.org/elogs/X%3E1+%26+EMC/249 | ||
** Aug 14: '''latest version''' https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1205 | ** Aug 14: '''latest version''' https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1205 | ||
| + | |||
| + | '''Holly's comments on offsets with the CaFe optics:''' | ||
| + | |||
| + | pphi_offset should match the first coefficient in the 0th order line. We don’t put the 0th order elements in the mamtrix elements for replay. | ||
| + | |||
| + | We copy the offset to the hmsflags.param. It’s usually just the pphi_offset, leave ptheta_offset to 0, and you can then fit the ppcentral_offset | ||
| + | |||
| + | we have no delta optimization above 8.5, so you would need to try my offset (ppcentral_offset= 0.9979), | ||
| + | and look at the W at 9.2 GeV and then see if it needs to be shifted further | ||
| + | |||
==HMS== | ==HMS== | ||
Latest revision as of 13:45, 18 September 2024
pointing
Survey summary: https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1214
SHMS
Delta scan and Sieve data from Oct 2-3: https://logbooks.jlab.org/entry/4050330
Current matrix: https://github.com/JeffersonLab/hallc_replay_XEM/blob/pass1/PARAM/SHMS/GEN/pcana_fa22.param
From CaFe
Optics runs with HMS@-5.587 GeV/c, SHMS@-8.55GeV/c in Aug 2022. See summary at https://logbooks.jlab.org/entry/4025938
- new SHMS matrix:
- according to Holly, a bug was found in this new matrix, she needs a few days to fix it. --Mar 15, 2023
theta, phi, y: https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1198delta: https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1205
- Aug 11: newer version with the raster sign flip issue fixed https://hallcweb.jlab.org/elogs/X%3E1+%26+EMC/249
- Aug 14: latest version https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1205
Holly's comments on offsets with the CaFe optics:
pphi_offset should match the first coefficient in the 0th order line. We don’t put the 0th order elements in the mamtrix elements for replay.
We copy the offset to the hmsflags.param. It’s usually just the pphi_offset, leave ptheta_offset to 0, and you can then fit the ppcentral_offset
we have no delta optimization above 8.5, so you would need to try my offset (ppcentral_offset= 0.9979), and look at the W at 9.2 GeV and then see if it needs to be shifted further
HMS
HMS optics data from pionLT: https://hallcweb.jlab.org/wiki/index.php/12_GeV_HMS_Optics_Data
Standard matrix
The standard matrix for p0<5GeV/c. Should work up to 5.8GeV/c since we are modify the dipole central setting to give the correct ytar versus yptar. Need to cross check with other optics data b/w 5-5.8GeV/c (per Mark Jones).
- file from 2018: File:Hms recon coeff opt2018.txt
- already in hallc_replay_XEM/PARAM/HMS/GEN/hcana_fa22.param, no further change needed
- to do: check with hydrogen elastic data?
6.3 GeV/c saturated
Part of PionLT optics data. May not be analyzed.
6.6 GeV/c saturated
waiting for Jacob Murphy's reply.
