Target Analysis for E06-014: d2n experiment



  1. d2n (Samantha) cell characterestic:

    1. Wall thickness: result of a wall thickness measurement performed at EEL lab. on summer 09 is summarized here.
    2. 3He Density   : this measurement was done also at EEL lab. on summer 09. Several data scans were taken at different
                               temperature to extract the 3He density including the Pressure Broadening (PB) of the Rb resonance absorption
                               line, D1. Plot showing the fit results can be found here.
                                - 3He density (JLab result): 8.099 +/- 0.032 amg.
                                - 3He density (UVA result) : 7.99 +/- 0.01 amg.
    3. 3He Density During Production: Result of 3He density during production is summarized:
                                - D2n Run By Run Pumping & Target Chamber Density:   Pumping Plot,    Target Plot,    Data(Run # / Pumping Density / Target Density)

  2. Internal Temperature Test:

    1. Three measurements were carried out on Feb/March 2009:
      1. Transverse pumping was performed on Feb 07, 09 (halog entry)
      2. Longitudinal pumping was performed on Feb. 23, 09 (halog entry)
      3. Transverse pumping was performed on March. 16, 09 (halog entry)
    2. This analysis was done to figure out the inconsistency between the online and offline temperature values. The result can be found here.

  3. EPR Measurement:

    1. Approximately twenty EPR measurements have be done during a d2n running period (EPR summary)
    2. Old EPR polarization results using the online RTD readback temperature values and 3He filling density are plotted here.
    3. New EPR polarization values to be extracted with the predicted temperature values and 3He density including the PB .
                                - D2n EPR results summary:   Results Summary,    Plot

  4. Target chamber polarization from EPR-NMR calibration:

    1. From the EPR calibration, we know the EPR-NMR calibration constants are:
                                -D2n Transverse Case: 1.77419+/-0.04768 %/mV
                                -D2n Longitudinal Case: 2.84233+/-0.07799 %/mV
    2. Then from the EPR-NMR calibration constants and NMR signals during the experiment we know the polarization
                                - D2n run by run polarization:   Plot,   Data(Production Run #/ Polarization)
                               







Yawei Zhang
Last modified: October 6, 2011