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Two separate series of TOF measurements were performed with tritium
concentration 
(Series A) and 
(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
)
with different background subtractions
and energy cuts. Two separate series of runs were performed with
tritium concentration
and .
| US |
ct |
E cut |
BG |
Yield (10-6/GMU) |
| (ID) |
(%) |
(
ch) |
|
Si1 |
Si2 |
Si avg. |
| 3 T |
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 |
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 |
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 |
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 |
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) |
|
|
|
|
|
|
|
|
Next: TOF series A
Up: Yield measurements
Previous: MOD: Moderation Yield