Silviu's Analysis Work
Beam Studies 1 - Oct 31, 2002

  • beamontarget.ps it shows the temperature sensor that the PID feedback of the HPH is currently regulating on in red, and the power of the HPH One can see that beam on/off was producing temperature excursion of 250mK peak-to-peak, and that the HPH was about 425 W without beam and round 130 W with beam.
  • beamonLH2.ps shows the whole interval of "full" beam on target period, from the HPH point of view.
  • beamcurrent.ps shows the beam current for the time span displayed in beamontarget.ps, the time discrepancy on the horizontal scale si due to the fact that the beam current is archived on the jlab's general database for epics variables, while our target parameters are archived on the target computer, and our archiver has a 1h mismatch with respect to the general jlab archiver.
  • targetscan_30Oct02.ps which shows the results from the target scan in beam,

Silviu Covrig

Target Boiloff incident Nov. 4

  • tgtboiloff_4Nov02.ps displays the pressure and the temperature in the target during the boiloff
  • pump_boiloff_4Nov02.ps displays the pump frequency and the pump head during the same period of time
  • He-H_boiloff_4Nov02.ps displays the differential pressure between H2 and He across the exit window of the He cell during the same period of time
  • boiloff_4Nov02.ps displays the pressure and temperature in the target over the whole time span of about two hours between losing the coolant and the target ready for beam with a full LH2 target. The break in the signal comes from power cycling the IOC (which cleared the faulty behavior of the JT valve software control)
G0 Target boiling studies (I)

  • na_run14686.ps beam at 15 uA, raster size at 2x2 mm2, NA detector rings 1, 2, 9 and 10
  • na_run14689.ps beam at 15 uA, raster size at 2x2 mm2, NA detector rings 1, 2, 9 and 10 (different lumi)
  • na_run14690.ps beam at 15 uA, raster size at 1x1 mm2, NA detector rings 1, 2, 9 and 10
  • na_run14691.ps beam at 18 uA, raster size at 1x1 mm2, NA detector rings 1, 2, 9 and 10
  • na_run14692.ps beam at 18 uA, raster size at 0.5x0.5 mm2, NA detector rings 1, 2, 9 and 10
  • lumis.ps summary file with relevant lumi histograms
  • lumi2_run14689, lumi2_run14690, lumi2_run14692, correlation plots for lumi 2
  • lumi1_run14687, lumi1_run14690, lumi1_run14692, correlation plots for lumi 1
  • A4lumi_run14690, A4lumi_run14691, A4lumi_run14692, correlation plots for A4 lumi (the water Cherenkov detector)
  • lumis15_18_rev.ps lumi 1 and 2 widths fitted with a hyperbola in beam raster area. The lumi width is assumed to be made up of two terms, one target density free, s0, and one target density dependent, s1, which is assumed to vary as inverse of beam raster area. The two add up in quadrature to give a total lumi width square (revised).
  • g0det15_18.ps The G0 detector asymmetry widths, broken in FR and NA, and overall. For NA there were only rings 1,2,9 and 10 that were patched into scalers.
G0 Target boiling studies (II)

  • det20beam31pump.ps The G0 detector asymmetry widths, broken in FR and NA, and overall. For NA there were only rings 1,2,9 and 10 that were patched into scalers. Beam current 20 uA, pump speed 31 Hz.
  • det30beam31pump.ps The G0 detector asymmetry widths, broken in FR and NA, and overall. For NA there were only rings 1,2,9 and 10 that were patched into scalers. Beam current 30 uA, pump speed 31 Hz.
  • det40beam31pump.ps The G0 detector asymmetry widths, broken in FR and NA, and overall. For NA there were only rings 1,2,9 and 10 that were patched into scalers. Beam current 40 uA, pump speed 31 Hz.
  • det40beam19pump.ps The G0 detector asymmetry widths, broken in FR and NA, and overall. For NA there were only rings 1,2,9 and 10 that were patched into scalers. Beam current 40 uA, pump speed 19 Hz.
  • det40beam42pump.ps The G0 detector asymmetry widths, broken in FR and NA, and overall. For NA there were only rings 1,2,9 and 10 that were patched into scalers. Beam current 40 uA, pump speed 42 Hz.
  • fanspeedfit.ps Raster area of 3.4 x 3.4 mm2, nominal beam of 40 uA.
General G0 studies

  • beam_HCprms.ps cumulative beam parameters over the asymmetry runs, versus run number (all data at 5000 A, amendable for the choice of "bad" runs, same resoning applys for the following results).
  • beam_HWP_HCprms.ps cumulative beam parameters over the asymmetry runs versus insertable HWP state (all data at 5000 A).
  • beam_HCprms_widths.ps cumulative beam parameter widths over the asymmetry runs, versus run number (all data at 5000 A).
  • beam_HWP_HCprms_widths.ps cumulative beam parameter widths over the asymmetry runs versus insertable HWP state (all data at 5000 A).
Beam studies (II)

  • beam_trips.ps Proposal on implementing a beam charge cut for cleaning the detectors yields of beam trip and recovery related events.
Lambda-K-proton studies
Analysis

  • yield_all.ps FR ToF, detectors' yields over good_for_production runs. Spectra have been aligned to the proton peak for each detector and then summed up, grouping four 1/4 ns bins into one bin, over all four octants and all runs.
  • yield_allHWP.ps FR ToF yields over good_for_prod runs, HWP states separated, to check if the peaks are well aligned between the two HWP states.
  • yield_allHWPwcuts.ps FR ToF yields over good_for_prod runs, HWP states separated, to check if the peaks are well aligned between the two HWP states.
  • asym_HWP.ps FR ToF asymmetries over good_for_prod runs, HWP states separated. 68 runs IN, and 54 runs OUT
  • asyma_HWPcuts.ps FR ToF asymmetries over good_for_prod_with_cuts (33 runs), HWP states separated, 21 runs IN, and 12 runs OUT.
  • asym_all.ps FR ToF asymmetries over good_for_production runs (120 runs). Asymmetries are weighted by their error. OUT - IN = ALL.
  • asym_all_wcuts.ps FR ToF asymmetries over good_for_production_with_cuts runs (33 runs). Asymmetries are wieghted by their error. OUT - IN = ALL.
  • elastic_asym.ps Proton elastic asymmetries computed over the proton peak, considering the peak to be either +/- 1 ns or +/- 2 ns around the actual peak.
  • elastic_asym_cuts.ps Proton elastic asymmetries computed over the proton peak and over 33 asymmetry runs in good_for_prod_with_cuts (Doug's list).
  • beam_quality.ps Beam charge asymmetry, position in x and y over a range of runs that passed a 25 ppm cut on charge asymmetry and 150 nm cut on position differences respectively.
  • beam_IHWP.ps Beam parity quality, averages over IHWP states, same cuts as above.
  • beam_quality.txt Beam quality summary over the range of runs considered above.

    ===================================== 4th replay db =========================================

    Last revisited on May 27, 2004

  • elastic_asym.ps Asymmetry over the proton elastic peak. IHWP behaviour separated and combined.
  • inelastic_asym.ps Asymmetry over the proton inelastic peak. IHWP behaviour separated and combined.
  • elastic_corr.ps Elastic asymmetry corrected for background. The correction procedure takes into account the side bands to the elastic peak and makes a linear fit to yield and asymmetry across the elastic peak (see background studies below) timebin by timebin.
  • dilution.ps Dilution factors for the integral of inelastic stuff under the elastic peak.
  • error_elastic.txt Corrected elastic asymmetry error breakdown into contributions from inelastic dilution factor, statistics and inelastic asymmetry.
  • asymeltof_IHWP.ps Proton elastic asymmetry, separated into IHWP states, to check the helicity systematics of the asymmetry over the elastic proton peak bins.
  • asymtof_all.ps FR ToF asymmetries over good runs with cuts on beam position differences (<150 nm) and charge asymmetry (<25 ppm). Asymmetries are weighted by their error. OUT - IN = ALL. Original spectra have 128 tof bins of 0.25 ns each, and I summed 4 bins into 1 bin of 1 ns. There are 24 bins corresponding to 96 original bins, higher number bins have been neglected since they have very low statistics.
  • asymtof_IHWP.ps FR ToF asymmetries, separated into IHWP states, to check the helicity systematics of the asymmetries over the ToF spectrum.
  • yield_IHWP.ps FR ToF yields over good runs with cuts on beam position differences (<150 nm) and charge asymmetry (<25 ppm). Asymmetries are weighted by their error. IHWP states separated. Check to see that the proton elastic peak falls in the same bin for both states of the IHWP.
  • beam_quality_4threp.ps Beam charge asymmetry, position and angle differences in x and y and energy differences over a range of runs that passed a 25 ppm cut on charge asymmetry and 150 nm cut on position differences respectively.
  • beam_IHWP_4threp.ps Beam parity quality, averages over IHWP states.
  • beam_quality_4threp.txt Beam quality summary over the range of runs considered above.

    Counting statistics studies

  • counting_det1_2.ps Detectors 1 and 2, counting statistics, elastic and inelastic peaks. The plot shows the ratio of estimated asymmetry width from yield to asymmetry width from asymmetry distribution.
  • counting_det3_4.ps Detectors 3 and 4, counting statistics, elastic and inelastic peaks. The plot shows the ratio of estimated asymmetry width from yield to asymmetry width from asymmetry distribution.
  • counting_det5_6.ps Detectors 5 and 6, counting statistics, elastic and inelastic peaks. The plot shows the ratio of estimated asymmetry width from yield to asymmetry width from asymmetry distribution.
  • counting_det7_8.ps Detectors 7 and 8, counting statistics, elastic and inelastic peaks. The plot shows the ratio of estimated asymmetry width from yield to asymmetry width from asymmetry distribution.
  • counting_det9_10.ps Detectors 9 and 10, counting statistics, elastic and inelastic peaks. The plot shows the ratio of estimated asymmetry width from yield to asymmetry width from asymmetry distribution.
  • counting_det11_12.ps Detectors 11 and 12, counting statistics, elastic and inelastic peaks. The plot shows the ratio of estimated asymmetry width from yield to asymmetry width from asymmetry distribution.
  • counting_det13_14.ps Detectors 13 and 14, counting statistics, elastic and inelastic peaks. The plot shows the ratio of estimated asymmetry width from yield to asymmetry width from asymmetry distribution.
  • counting_det15.ps Detectors 15, counting statistics, elastic and inelastic peaks. The plot shows the ratio of estimated asymmetry width from yield to asymmetry width from asymmetry distribution.
  • counting_det.ps Counting statistics for detectors 1 through 15, from flat fits to data/detector over time.
  • countbeam_det1_2.ps Detectors 1 and 2, counting statistics, elastic and inelastic peaks versus beam current.
  • countbeam_det3_4.ps Detectors 3 and 4, counting statistics, elastic and inelastic peaks versus beam current.
  • countbeam_det5_6.ps Detectors 5 and 6, counting statistics, elastic and inelastic peaks versus beam current.
  • countbeam_det7_8.ps Detectors 7 and 8, counting statistics, elastic and inelastic peaks versus beam current.
  • countbeam_det9_10.ps Detectors 9 and 10, counting statistics, elastic and inelastic peaks versus beam current.
  • countbeam_det11_12.ps Detectors 11 and 12, counting statistics, elastic and inelastic peaks versus beam current.
  • countbeam_det13_14.ps Detectors 13 and 14, counting statistics, elastic and inelastic peaks versus beam current.
  • countbeam_det15.ps Detector 15, counting statistics, elastic and inelastic peaks versus beam current.

    Asymmetries over time studies

  • asym_elastics.ps Detectors 1-15, elastic asymmetries over run number histogramed and properly weighted by their errors (for IN runs the asymmetry sign has been reversed).
  • asym_elastics_IHWP.ps Detectors 1-15, elastic asymmetries over run number histogramed and properly weighted by their errors and separated into IN and OUT.
  • asym_inelastics.ps Detectors 1-15, inelastic asymmetries over run number histogramed and properly weighted by their errors (for IN runs the asymmetry sign has been reversed).
  • asym_inelastics_IHWP.ps Detectors 1-15, inelastic asymmetries over run number histogramed and properly weighted by their errors and separated into IN and OUT.
  • summary.txt Summary file with asymmetries after the subtraction of the inelastic background from under the elastic proton peak.

    FR bins systematic studies Mar 2004

    Linear regression studies Apr 2004

    Elastic Peak studies May 2004

    Nim paper Apr 2004

  • elastic_asym.ps The asymmetry computed over the elastic proton peak in the FR detectors with three methods, counting statistics asymmetry, asymmetry Adet = Sum(Ai*Yi)/Sum(Yi), where Yi = (number_of_quartets)x(normalized_yield)x(charge/MPS), i is the run index and error sigmaAdet = Sqrt{1/Sum[Yi]}, Silviu asymmetry ASdet = Sum[Ai/(sigmaAi)2]/Sum[1/(sigmaAi)2], and error sigmaAdet = Sqrt{Sum[1/(sigmai)2}, and Julie asymmetry, as taken from the db-defined elastic proton peak and summed up as independent measurements over octants in a run and over runs.
  • nullelasticasym.ps The null elastic asymmetry test over the elastic proton peak with the three methods.
  • asymmmetries.txt Summary table with side by side asymmetries and their errors as computed with the two methods. These reflect the sums over the 61 IN and 52 OUT runs with production quality data.
  • bins_cstat.txt Summary of individual quarter ns bins' counting statistics over detectors, in each octant, and over good runs for the elastic proton peak. One can see the differences in systematics in these bins, counting statistics fractions vary by more than 0.1 in the same run for the same proton peak (same detector, same octant - 13Mb file!), which is a significant figure, considering that counting statistics fraction errors are usually less than 0.005 over a run.
    FR bins simulation Feb 26, 2004
  • asymnote.ps A brief note on computing the asymmetry in G0-FR with the Silviu and Julie methods, it also contains the definition for counting statistics fraction per bin and the extension to a cut of bins.

    Target density fluctuations studies

    Background studies

G0