Caltech's Target for G0

@ Caltech's Target for G0

The G⁰ Target

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 (I)

lambda.ps From ep -> e(Lambda,K) plots of "counts" vs. lambda energy and angle (the phase space for lambda), from kinematics only.
lambda.pdf
kaon.ps From ep -> e(Lambda,K) plots of "counts" vs. Kaon energy and angle (the phase space for K+), from kinematics only.
kaon.pdf
proton.ps From Lambda -> ppi- plot of "counts" vs. proton angle (the acceptance for p from lambda decay), from kinematics only. Generating E_p in the lab frame.
proton2.ps From Lambda -> ppi- plot of "counts" vs. proton angle (the acceptance for p from lambda decay), from kinematics only. Generating theta_p_cm.
fermi0.pdf Test of the generator according to the distribution function k*k*n(k).
fermi.pdf Protons in G0 acceptance coming from Lambda decay coming from Al nucleus, fermi motion included; second graph is a graph of the radial distribution function in momentum space (no generation, just the analytical form plotted).
fermi_fe.ps Test of the generator according to a distribution derived from a scaling function whose parametrization I got from John Arrington (for Fe).
fermi_fe1.pdf Test of the generator according to the distribution function k*k*n(k). Scaling function from John A. for Fe.

Lambda-proton studies, using G0GEANT (II)

lambda_rate.ps Rates of protons from lambda decay into the detector, using the KaonMaid unpolarized photoproduction generator to generate lambda events in the LH₂ target according to gamma-p ->lambda-K⁺, and in the AL windows according to gamma-p - > lambda-K⁺, and gamma-n -> lambda-K⁰. The fermi motion of nucleons in the Al windows is considered.
lambda_tof.ps ToF of protons from lambda decay.
lambda_comp_tof.ps ToF of protons from lambda decay compared with the inelastic and elastic proton peaks.

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 =========================================
Preliminary, Aug 27, 2003
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.
Asymmetries over time studies
asym_det1_2.ps Detectors 1 and 2, asymmetries over run number, elastic and inelastic peaks.
asym_det3_4.ps Detectors 3 and 4, asymmetries over run number, elastic and inelastic peaks.
asym_det5_6.ps Detectors 5 and 6, asymmetries over run number, elastic and inelastic peaks.
asym_det7_8.ps Detectors 7 and 8, asymmetries over run number, elastic and inelastic peaks.
asym_det9_10.ps Detectors 9 and 10, asymmetries over run number, elastic and inelastic peaks.
asym_det11_12.ps Detectors 11 and 12, asymmetries over run number, elastic and inelastic peaks.
asym_det13_14.ps Detectors 13 and 14, asymmetries over run number, elastic and inelastic peaks.
asym_det15.ps Detector 15, asymmetries over run number, elastic and inelastic peaks.
chisq.ps Chisquares from the flat fits of asymmetries over time vs. detector number. Also the probabilities to get these chisquares vs. detector number are plotted.
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.
Background studies
bckg_asymfit.ps Linear fit to side bands of the elastic peak of background asymmetries.
bckg_yieldfit.ps Linear fit to side bands of the elastic peak of background yield.