Useful optics info

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=1198
  • delta: 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.