New methods for semiconductor charge-diffusion-length measurements using synchrotron radiation.
The extension of a new theory on the X-ray energy response of semiconductor detectors is carried out to characterize the X-ray response of a multichannel semiconductor detector fabricated on one silicon wafer. Recently, these multichannel detectors have been widely utilized for position-sensitive observations in various research fields, including synchrotron radiation research and fusion-plasma investigations. This article represents the verification of the physics essentials of a proposed theory on the X-ray response of semiconductor detectors. The three-dimensional charge-diffusion effects on the adjoining detector-channel signals are experimentally demonstrated at the Photon Factory for two types of multichannel detectors. These findings are conveniently applicable for measuring diffusion lengths for industrial requirements.
Kohagura
J
J
Plasma Research Centre, University of Tsukuba, Ibaraki 305, Japan.
Cho
T
T
Hirata
M
M
Okamura
T
T
Tamano
T
T
Yatsu
K
K
Miyoshi
S
S
Hirano
K
K
Maezawa
H
H