Target density variation check

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Run summary

  • First measurement 09/02/2019
    • HALOG summary
    • Target #7 and #10 were checked for current range 5-70uA
    • Septum mistuned on purpose in order to reduce rates, T2 trigger is used
    • Sieve in
    • Clear non-uniformity observed from degraded target (#10) compared to good (still in use) target (#7).
    • More visible at higher current, but hint of similar signature of density rearrangement seen at low current.
    • Consistent results from both LHRS and RHRS spot data


  • Second measurement 09/03/2019
    • HALOG summary
    • Took high statistics run at very low current (30nA requested), Target #10
    • Septum at nominal setting, no Sieve
    • Similar result shown in RHRS data as previous high current test
    • Different distribution in LHRS is puzzling, might be related to DAQ problem


  • Qsq runs 09/03/2019
    • 400-500k events for LHRS and RHRS runs during Qsq measurements with various targets (Pb7, 8, 9, 10)
    • HALOG run summary
    • Consistency between LHRS and RHRS recovered for target #10 [1]

How to make plots

  • full replay macro can be found from:
/adaqfs/home/a-onl/sanghwa/stupid_spot/get_rastersize.C
  • To run:
> analyzer -b -q 'get_rastersize.C(run#, first evt, last evt, "outputpath/outputname")'

Example:

> analyzer -b -q 'get_rastersize.C(2293, 1, -1, "rootfiles/L2293.root")'
  • To draw raster current xy distribution:
    • /adaqfs/home/a-onl/sanghwa/stupid_spot/make_2D.C
> root -b
> .L make_2D.C
> plot_all("dyn_therm.list")
This will create dyn_dens.pdf. To open:
> evince dyn_dens.pdf &
  • Input file format:
<LHRS run#> <LHRS file path> <RHRS run#> <RHRS file path> <current> <target#>