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TOFY: Time-of-flight Yield

Two separate series of TOF measurements were performed with tritium concentration $c_t=0.1\%$ (Series A) and $c_t=0.2\%$ (Series B). Due to the small counting rates, the TOF measurements, especially the ones with thin DS layers, were most difficult among the fusion measurements. We give in Table 8.6 the Si detector yield per GMU for TOFY measurements with different background and energy cut conditions. The information we obtain in this section, such as the background and the fusion yield, will be directly applicable to the time-of-flight spectrum measurements which are our main physics data. Hence we give some detailed discussion here of the background subtraction.


 
Table 8.6: Si yield per GMU for the TOF measurements (DS fusion with US moderator fixed at 14 T$\cdot l$) with different background subtractions and energy cuts. Two separate series of runs were performed with tritium concentration $c_t=0.1\%$ and .
US ct E cut BG Yield (10-6/GMU)
(ID) (%) ( ch)   Si1 Si2 Si avg.
3 T$\cdot l$ 0.1 2.0; 3.7 BG5 5.74(40) 5.81(42) 5.77(29)
(II-9)     BG6 5.64(42) 4.29(47) 4.96(31)
      BG5+6+7 5.66(24) 5.61(25) 5.63(18)
    2.5; 3.7 BG5 4.95(33) 5.07(34) 5.01(24)
      BG6 5.20(34) 3.67(39) 4.43(26)
      BG5+6+7 4.88(21) 4.75(21) 4.82(15)
    3.1; 3.7 BG5 4.04(25) 4.39(24) 4.22(17)
      BG6 4.35(25) 3.53(28) 3.94(19)
      BG5+6+7 4.12(16) 3.98(16) 4.05(11)

6 T$\cdot l$

0.1 2.0; 3.7 BG5 8.83(81) 9.89(85) 9.36(59)
(II-10)     BG6 8.73(82) 8.38(88) 8.55(60)
      BG5+6+7 8.75(74) 9.67(79) 9.22(54)
    2.7; 3.7 BG5 8.79(70) 9.55(72) 9.17(50)
      BG6 9.01(70) 8.48(74) 8.75(51)
      BG5+6+7 8.68(66) 9.26(68) 8.97(47)

20 T$\cdot l$

0.1 1.0; 3.7 BG5 30.2(15) 28.0(15) 29.1(11)
(II-11)     BG6 22.4(16) 18.9(16) 20.7(11)
      BG5+6+7 29.1(14) 26.5(14) 27.8(10)

  2.0; 3.7 BG5 19.3(10) 18.8(10) 19.05(68)
      BG6 19.2(10) 17.3(10) 18.24(69)
      BG5+6+7 19.2(9) 18.6(9) 18.91(64)

  2.7; 3.7 BG5 16.3(8) 16.6(8) 16.45(59)
      BG6 16.5(8) 15.5(9) 16.03(59)
      BG5+6+7 16.2(8) 16.3(8) 16.25(56)

3 T$\cdot l$

0.2 2.0; 3.7 BG7 2.81(33) 3.85(36) 3.33(24)
(II-14)   2.5; 3.7 BG7 3.02(29) 3.45(30) 3.25(21)
    3.1; 3.7 BG7 2.86(23) 2.93(23) 2.89(16)

23 T$\cdot l$

0.2 1.0; 3.7 BG7 23.6(10) 22.7(10) 23.16(73)
(II-15)   2.0; 3.7 BG7 21.1(7) 21.1(8) 21.08(52)
    2.7; 3.7 BG7 18.6(7) 18.9(7) 18.70(46)

           
 


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Next: TOF series A Up: Yield measurements Previous: MOD: Moderation Yield