Wind Turbine Blade Nondestructive Testing with a Transportable Radiography System

Table 1

The calculated parameters for gamma ray radiography system, with 20 cm thickness of the object and 1 cm source-focal spot size (all values for 1.691 MeV photons).

𝐿; (cm)	𝑎; (cm)	Spot size; (cm)	θ; (°)	𝑈g; (cm)	𝑓 gamma *; (g cm^−2 s^−1)	Uncollided gamma*; (%)
75	200	30	4.29	1.00𝐸−1	1.07𝐸+7	99.24
80	220	35	4.54	9.09𝐸−2	9.12𝐸+6	99.24
85	240	40	4.76	8.33𝐸−2	7.79𝐸+6	99.25
90	260	45	4.94	7.69𝐸−2	6.75𝐸+6	99.25
95	280	50	5.1	7.14𝐸−2	5.90𝐸+6	99.22
100	300	60	5.71	6.67𝐸−2	5.34𝐸+6	99.27

*1.691 MeV.