IBIC - 2 MeV He / 1 MeV H

n+

p+

signal

transverse

normal

2 MeV He

1 MeV H

TRANSVERSE:

• Beam 2 MeV He+

• Shaping time 1 ms

• Reveals:
  • high charge collection efficiency from depletion region on surface layer
  • Low charge collection efficiency from absorber layer

NORMAL

• 2 MeV He+ range is 7 mm

• 1 MeV H+ range is 15 mm

• Reveals:
  • Shallow He beam shows dominance of surface texture
  • Deeper H beam shows deep grain boundary alone

200x200 mm

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