Temperature dependence of commercially available diode detectors
Temperature dependence of commercially available diode detectors
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DOI：
10.1118/1.1461842
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发表时间：
2002-04-01
期刊：
影响因子：
3.8
通讯作者：
Zhu, TC
中科院分区：
文献类型：
--
作者：
Saini, AS;Zhu, TC
实验研究了市售的n型和p型二极管在高瞬时剂量率（脉冲）和低剂量率（连续）辐照下的温度依赖性。在SSD = 80或100 cm. 10 x 10 cm（2）。在10 ℃和35 ℃之间，在30 x 30 x 30 cm（3）水模体中，深度为5 cm。所有二极管检测器的响应都是线性的。温度系数（或灵敏度随温度的变化，svwt）是剂量率无关的预辐照二极管。它们为（0.30 +/- 0.01）%/℃（0.36 +/- 0.03）%/℃。和（0.29 +/- 0.08）%/℃的QED p型。EDP p型。和Isorad n型二极管。在低剂量率[（0.16 ~ 0.45）%/℃]下，未辐照的n型二极管的温度系数不同。连续的钴]和高瞬时剂量率[（0.07 ± 0.02）%/℃.脉冲辐射]。而且。温度系数在各个二极管之间变化。同样，一个特殊的未辐照QED p型二极管的温度系数是不同的低剂量率（0.34%/degreesC，钴）和高瞬时剂量率[（0.26 +/- 0.01）%/degreesC，脉冲辐射]。充分的预辐照可以消除剂量率依赖性或温度系数。相反，预辐照不能消除二极管灵敏度本身的密切速率依赖性。(C)2002年美国医学物理学家协会。
Temperature dependence of commercially available n- and p-type diodes were studied experimentally under both high instantaneous dose rate (pulsed) and low dose rate (Continuous) radiation, The 2 sensitivity versus temperature was measured at SSD = 80 or 100 cm. 10 x 10 cm(2). and 5 cm depth in a 30 x 30 x 30 cm(3) water phantom between 10 degreesC and 35 degreesC. The response was linear for all the diode detectors. The temperature coefficient (or sensitivity variation with temperature, svwt) was dose rate independent for preirradiated diodes. They were (0.30 +/- 0.01)%/degreesC (0.36 +/- 0.03)%/degreesC. and (0.29 +/- 0.08)%/degreesC for QED p-type. EDP p-type. and Isorad n-type diodes, respectively. The temperature coefficient for unirradiated n-type diodes was different under low dose rate [(0.16 to 0.45)%/degreesC. continuous. cobalt] and high instantaneous dose rate [(0.07 +/-0.02)%/degreesC. pulsed radiation]. Moreover. the temperature coefficient varies among individual diodes. Similarly, the temperature coefficient for a special unirradiated QED p-type diode was different under low dose rate (0.34%/degreesC, cobalt) and high instantaneous, dose rate [(0.26 +/- 0.01)%/degreesC, pulsed radiation]. Sufficient preirradiation can eliminate dose rate dependence Or the temperature coefficient. On the contrary, preirradiation cannot eliminate close rate dependence of the diode sensitivity itself. (C) 2002 American Association of Physicists in Medicine.