Log entry time 08:37:32 on June11,2004

Entry number 125349

Owl Shift Summary

Current scan to check target with beam and to check septum heating.

HAPPEX DAQ

Runs: 2018 - 3x3 raster
      2019 - 3x3 raster, try out charge (IA) feedback
      2020 - 2x2 raster

3:00 - Low current running with 4He to locate the elastic peak relative to the HAPPEX detectors

-2% P = 2.9709 GeV/c
3:30 Start Spectrometer DAQ

Run 1116: -2%, 0.5 uA, 4He
Run 1117: -2%, 0.5 uA, 12C

4:10 - change momentum to +2%, P=3.09213 GeV/c
Run 1118 - short run to check scaler rates
Run 1119 - +2%, 0.5 uA, 12C
Run 1120 - +2%, 0.5 uA, 4He

Readjusted the momentum of the spectrometer in order to center the 4He elastic peak on the HAPPEX detectors.

Left momentum = 3.009 GeV/c, Left septum current = 278.57 A
Right momentum = 3.005 GeV/c, Right septum current = 278.2 A

Run 1121: check alignment of detector at correct momentum (as written above), 4He, 0.5 uA.

Switch to the HAPPEX DAQ: Follow procedure on the web at:

http://hallaweb.jlab.org/experiment/HAPPEX/check_spectdaq.html

Take data with the HAPPEX DAQ : 4He target, 2x2 raster, 10 uA, feedback on

Run 2021 - check detector asymmetry widths, ~3000 ppm - this is good.  The 4He elastic peak is now aligned with the HAPPEX detectors.

Run 2022
    2023 - test dithering
    2024
    2025