Electronic Resource
Chester
:
International Union of Crystallography (IUCr)
Journal of synchrotron radiation
5 (1998), S. 1332-1336
ISSN:
1600-5775
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Geosciences
,
Physics
Notes:
An X-ray linear-array detector was fabricated using high-pressure Bridgman-grown CdZnTe. The detector area was 175 × 800 µm and the pitch size was 250 µm. The measured dark current for the test 16-element detector was as low as 0.1 pA at 800 V cm−1 with excellent uniformity. Energy spectra were measured using a 57Co radiation source. Both a small-pixel effect and charge sharing were observed. For the arrays, an average 5.8% full width at half-maximum (FWHM) at the 122 keV photopeak was obtained with a standard deviation of 0.2%. A large-area detector (1 × 1 cm) of the same material before fabrication exhibited a low-energy tail at the photopeak, which limits the photopeak FWHM to 8%, typically due to hole trapping. At energies below 60 keV, charge sharing between elements was observed. The charge sharing was greatly reduced by providing a path to ground for unwanted charges. A prototype readout electronic system for an eight-channel array detector was developed. A readout system intended for a multielement solid-state detector system was also used. The array detector will be used for high-energy diffraction and Compton scattering measurements at the Advanced Photon Source.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0909049598007237
Permalink
| Library |
Location |
Call Number |
Volume/Issue/Year |
Availability |
