Developments in room temperature cadmium telluride (CdTe) based solid state imaging arrays for energy-resolved single photon counting in x-ray imaging are discussed. We have designed and constructed a CdTe imaging array, 3 mm thick with a 16 × 16 grid of electrical contacts interconnected to a 256 channel ASIC, with a counting range up to 2 × 107 counts per second per mm2. Cycling between high and low flux generates measurements which are reproducible within the limits of counting statistics, with a response time less than 1 ms. Long-term stability is determined by measuring flood images repeatedly over time. Long exposure to uniform high or low flux does not affect the temporal response, indicating that no polarization is detected within the statistical error of the measurements.
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机译：讨论了基于室温碲化镉（CdTe）的固态成像阵列在X射线成像中用于能量分辨单光子计数的发展。我们设计并构建了一个CdTe成像阵列，其厚度为3 mm，具有16×16的电触点网格，该触点与256通道ASIC互连，计数范围每秒高达2×10 7 mm 2 。高通量和低通量之间的循环会生成可在计数统计数据的范围内再现的测量值，且响应时间小于1毫秒。长期稳定性是通过随时间反复测量洪水图像来确定的。长时间暴露于均匀的高或低通量不会影响时间响应，这表明在测量的统计误差范围内未检测到极化。
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