Table 4 Optimised gradients of the quadrupole magnets Q350-Q520.

From: An experimental study of focused very high energy electron beams for radiotherapy

Quadrupole

Gradient (T/m)

158 MeV (f/10.9)

158 MeV (f/10.4)

201 MeV (f/18.2)

Q350

8.55

8.55

0.00

Q355

10.26

10.26

11.40

Q360

0.00

0.00

0.00

Q510

11.40

11.40

2.31

Q515

8.04

8.21

7.17

Q520

10.49

11.06

10.98