EFFECT OF ION-BEAM IRRADIATION ON POWER REFLECTIVITY OF BORON-DOPED CFC MATERIALS

NAGATSU M TAKADA N TSUCHIKURA I SASAKI S AKIBA M NAKAMURA K

M. Nagatsu et al., EFFECT OF ION-BEAM IRRADIATION ON POWER REFLECTIVITY OF BORON-DOPED CFC MATERIALS, Journal of nuclear materials, 241, 1997, pp. 1180-1184

11

INGLESE

Article

Nuclear Sciences & Tecnology","Mining & Mineral Processing","Material Science

Journal of nuclear materials → ACNP

0022-3115

241

1997

1180 - 1184

ISI

0022-3115(1997)241:<1180:EOIIOP>2.0.ZU;2-M

Effect of ion-beam irradiation on reflectivity characteristics for the 1D CFC (MFC-1) and newly developed boron-doped CI;Cs (Tonen 1D CFC) h as been investigated in the synchrotron radiation range from 119 to 79 1 mu m. The B4C-doped CFC showed higher reflectivity characteristics, such as R > 70% at 119 mu m and weaker fluence-dependencies on the ref lectivity at the fluences up to 8.5 x 10(24) m(-2), compared with MFC- 1. To understand the mechanism of reflectivity degradation due to ion beam irradiation, we have examined the surface property, such as rough ness and electrical conductivity. Result of electrical conductivity me asurement revealed that conductivity decreased as fluences similarly t o that of reflectivity, which suggested that reflectivity drop was mai nly caused by the change of electrical conductivity. Lastly, we presen ted the preliminary result of the beryllium coating on the irradiated surface to improve reflectivity characteristics. which showed that ref lectivity of the beryllium-coated CFC was raised from 60% to more than 80% at 119 mu m.