Pixelated transmission-mode diamond X-ray detector.
J Synchrotron Radiat
; 22(6): 1396-402, 2015 Nov.
Article
en En
| MEDLINE
| ID: mdl-26524304
ABSTRACT
Fabrication and testing of a prototype transmission-mode pixelated diamond X-ray detector (pitch size 60-100 µm), designed to simultaneously measure the flux, position and morphology of an X-ray beam in real time, are described. The pixel density is achieved by lithographically patterning vertical stripes on the front and horizontal stripes on the back of an electronic-grade chemical vapor deposition single-crystal diamond. The bias is rotated through the back horizontal stripes and the current is read out on the front vertical stripes at a rate of â¼ 1 kHz, which leads to an image sampling rate of â¼ 30 Hz. This novel signal readout scheme was tested at beamline X28C at the National Synchrotron Light Source (white beam, 5-15 keV) and at beamline G3 at the Cornell High Energy Synchrotron Source (monochromatic beam, 11.3 keV) with incident beam flux ranges from 1.8 × 10(-2) to 90 W mm(-2). Test results show that the novel detector provides precise beam position (positional noise within 1%) and morphology information (error within 2%), with an additional software-controlled single channel mode providing accurate flux measurement (fluctuation within 1%).
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Radiometría
/
Transductores
/
Difracción de Rayos X
/
Procesamiento de Señales Asistido por Computador
/
Diamante
Tipo de estudio:
Diagnostic_studies
/
Evaluation_studies
Idioma:
En
Año:
2015
Tipo del documento:
Article