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Run Series II


 
Table 4.3: Run summary for Series 2 (part 1)

ID Run Target Target GMU
    Upstream Downstream ( )
II-1 1625 SET1 (1000 T$\cdot l$ H2 with 0.1% T2) 20 T$\cdot l$ 51.882
II-2 1630 SET1 3 T$\cdot l$ 20 T$\cdot l$ 17.250
  1631 SET1 3 T$\cdot l$ 20 T$\cdot l$ 31.073
  subtotal 1530-31 48.323
II-3 1635 SET1 6 (3+3) T$\cdot l$ 20 T$\cdot l$ 50.392
II-4 1640 SET1 14 (3+3+8) T$\cdot l$ 20 T$\cdot l$ 33.483
II-5 1650 1000 T$\cdot l$ H2 - 41.391
  1654 1000 T$\cdot l$ H2 - 43.501
  subtotal 1530-31 84.892
II-6 1657 SET1 - 24.136
  1658 SET1 - 38.082
  subtotal 1530-31 62.218
II-7 1663 SET1 14 T$\cdot l$ - 39.791
  1664 SET1 14 T$\cdot l$ - 20.926
  subtotal 1663-64 60.717
II-8 1666 SET1 14 T$\cdot l$ 500 T$\cdot l$ H2 46.745
  1667 SET1 14 T$\cdot l$ 500 T$\cdot l$ H2 8.073
  subtotal 1666-67 54.818
II-9 1671 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 3 T$\cdot l$ 57.561
  1673 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 3 T$\cdot l$ 46.514
  1674 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 3 T$\cdot l$ 32.627
  1675 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 3 T$\cdot l$ 57.345
  1681 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 3 T$\cdot l$ 38.143
  1682 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 3 T$\cdot l$ 81.813
  1683 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 3 T$\cdot l$ 54.574
  1684 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 3 T$\cdot l$ 41.567*
  1685 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 3 T$\cdot l$ 29.243*
  1686 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 3 T$\cdot l$ 30.421*
  subtotal 1671-86 469.808*
II-10 1688 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 6 (3+3) T$\cdot l$ 50.370*
II-11 1690 SET1 14 T$\cdot l$ 500 T$\cdot l$ H 20 (3+3+8) T$\cdot l$ 54.109*

 



 
Table 4.4: Run summary for Series 2 (part 2)

ID Run US Target DS Target GMU ( )
II-12 1708 SET2 (1000 T$\cdot l$ H2 with 0.2% T2) - 46.441
II-13 1709 SET2 14 T$\cdot l$ - 52.875
  1711 SET2 14 T$\cdot l$ - 11.266
  1712 SET2 14 T$\cdot l$ - 40.259
  1713 SET2 14 T$\cdot l$ - 14.359
  1714 SET2 14 T$\cdot l$ - 48.087
  subtotal 1708-14 166.846
II-14 1719 SET2 14 T$\cdot l$ 3 T$\cdot l$ 58.499
  1723 SET2 14 T$\cdot l$ 3 T$\cdot l$ 51.871
  1728 SET2 14 T$\cdot l$ 3 T$\cdot l$ 37.135
  1729 SET2 14 T$\cdot l$ 3 T$\cdot l$ 38.114
  1730 SET2 14 T$\cdot l$ 3 T$\cdot l$ 10.839
  subtotal 1719-30 196.458
II-15 1741 SET2 14 T$\cdot l$ 23 (3+20) T$\cdot l$ 51.847
  1742 SET2 14 T$\cdot l$ 23 (3+20) T$\cdot l$ 7.385
  subtotal 1741-42 59.232
II-16 1693 SET0.5 20 T$\cdot l$ - 22.602
  1694 SET0.5 20 T$\cdot l$ - 70.664
  subtotal 1694-95 93.266
 


Run Series II was our production run, where the measurement of $d\mu t$molecular formation via time of flight was attempted. Improvements in the target system had been made after Series I. The gas diffuser was replaced with the one with sintered metal to ensure microscopic uniformity of the target film. The gas transfer tubing was modified to remove the problem of gas remaining in the transfer tube which had caused uncertainties in thin layer thicknesses. Target support foil spacing was reduced from 39 mm to 17.9 mm, in order to increase at the downstream reaction layer the number of $\mu t$ for energies 0.5-2 eV, at which the largest resonances were predicted. The MWPC imaging system, which would not have been as effective due to the smaller foil spacing, was replaced by another silicon detector. The z-dimension (beam direction) of both of 2000 mm2 silicon detectors were collimated to 13.9 mm, to view only the inner side of the Au foils, where target films exist, with reasonable (i.e., non-grazing) angles.

Shown in Tables 4.3 and 4.4 is the run summary for Series 2. The standard emission targets with tritium concentration 0.1% (SET1) and 0.2% (SET2) were used with deuterium overlayers shown with in the table. The GMUs were taken from the GMU scalers, but the runs with (*) in the table (Run 1684-90) had a problem with an ADC affecting silicon detector normalization, which will be corrected in Section 8.1.2.

Apart from the data for TOF measurements of molecular formation, test data for new experiments were taken during this run, which resulted in new proposals. These include precision measurement of muonic atom scattering cross sections and direct measurement of the $\mu $CF efficiency-limiting sticking probability.


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Next: Histogramming and analysis tools Up: Experimental Runs Previous: Run Series I