Table 1 Simulations with a0 = 10: Density after hydrodynamic expansion n0/γncr, radius of the sphere R or alternative box length of the cube Lc, simulation box length Lbox and simulation cell size Δx for a laser wavelength λ = 1 μm.

From: Optimizing laser-driven proton acceleration from overdense targets

n0/γncr

R [μm]

Lc[μm]

Lbox[μm]

Δx [μm]

4

10

16

39.81

0.011

2

25

20

50.16

0.016

1

32

25

63.19

0.023

0.67

36

29

72.34

0.028

0.5

40

32

79.62

0.032

0.28

48

39

95.95

0.042

0.2

54

44

108.06

0.049

0.1

68

55

136.14

0.049

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