Table 2.
Dose-per-pulse and ks,abs values, calculated using Eq. (3), corresponding to each charge-per-pulse in the beam.
| Nominal Beam Charge (nC/pulse) | Dw,cal (Gy/pulse) | ks,abs | ks,TVA | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 75 V | 200 V | 350 V | 600 V | 75 V | 200 V | 350 V | 600 V | ||
| 0.05 | 0.03 | 1.30 | 0.98 | 0.89 | 0.78 | 1.65 | 1.24 | 1.13 | 0.99 |
| 0.20 | 0.20 | 3.41 | 1.87 | 1.56 | 1.14 | 3.57 | 1.96 | 1.63 | 1.20 |
| 0.25 | 0.14 | 2.46 | 1.33 | 2.05 | No Data | 3.73 | 2.02 | 3.12 | No Data |
| 1.00 | 0.67 | 6.00 | 3.07 | 2.12 | 1.58 | 4.60 | 2.35 | 1.63 | 1.21 |
| 2.20 | 1.25 | 8.80 | 4.12 | 2.80 | 1.94 | 6.65 | 3.12 | 2.12 | 1.47 |
| 3.00 | 1.95 | 11.96 | 5.67 | No Data | 2.58 | 6.30 | 2.99 | No Data | 1.36 |
| 4.50 | 2.63 | 14.99 | 6.87 | 4.59 | 3.07 | 7.49 | 3.43 | 2.29 | 1.54 |
| 6.00 | 3.66 | 18.94 | 8.54 | 5.63 | 3.81 | 8.24 | 3.72 | 2.45 | 1.66 |
| 7.50 | 4.12 | 19.54 | 8.77 | 5.69 | 3.74 | 8.46 | 3.80 | 2.46 | 1.62 |
| 9.00 | 4.56 | 21.38 | 9.30 | 5.99 | 4.23 | 10.39 | 4.52 | 2.91 | 2.06 |
| 10.50 | 5.26 | 22.99 | 9.95 | 6.50 | 4.24 | 10.83 | 4.69 | 3.06 | 2.00 |
| 11.00 | 5.04 | 21.81 | 9.46 | 6.00 | 3.84 | 10.63 | 4.61 | 2.92 | 1.87 |
ks,abs values are seen to decrease with increasing voltage, as expected. ks,abs refers to the absolute recombination factor calculated from calorimeter measurements and ks,TVA refers to the recombination factor calculated using the graphical TVA method.