FEEDBACK AND BREAKDOWNS IN MICROSTRIP GAS COUNTERS
FEEDBACK AND BREAKDOWNS IN MICROSTRIP GAS COUNTERS
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微带气体计数器的反馈和故障
DOI：
10.1016/s0168-9002(97)00743-2
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发表时间：
1997
影响因子：
1.4
通讯作者：
P. Fonte
中科院分区：
文献类型：
--
作者：
V. Peskov;B. Ramsey;J. Kolodziejczak;P. Fonte
研究了微带气体计数器中的反馈和故障现象。在不同的气体混合物和几种压力下，对各种不同几何形状和衬底的微带进行了测试。此外，为了进行直接比较，还研究了类似的无衬底微带气体计数器。在衬底上的“常规”微带探测器的情况下，发现当接近最大增益时，会出现自熄灭流光，但这些流光只存在于非常窄的电压范围内，在此之后，它们迅速转变为滑动放电型击穿火花。对于没有衬底的微带探测器，情况则截然不同。在高增益(>；∼104)时，它们从成比例流光模式转变为自猝灭流光模式，并在非常宽的电压范围内稳定地工作在该模式下。当这些探测器发生击穿时，是通过一种以前没有报道的机制，并且没有例外地获得了比它们的底物对应的探测器高5-10倍的增益。这些研究的结论是，衬底代表链中的薄弱环节，理想情况下应该避免或至少从高场区域移除。在不可能做到这一点的情况下，倍增区域应该集中到阳极周围的最小体积，并在其他地方最大限度地抑制。提供了实现这一目标的配方，以及允许实现超过105的气体增益的新几何结构。
The phenomena of feedback and breakdowns in microstrip gas counters have been studied. Tests have been performed on a wide variety of microstrips of different geometries and substrates in various gas mixtures and at several pressures. In addition, for direct comparison, similar microstrip gas counters without substrates were also investigated. In the case of “conventional” microstrip detectors on substrates, it was found that as maximum gains were approached, self-quenched streamers occurred, but that these were present only over a very narrow voltage range after which they rapidly transited to gliding-discharge-type breakdown sparks. For microstrip detectors without substrates, the situation was quite different. At high gains (> ∼ 104) they transited from proportional to self-quenched streamer-mode and would operate stably in this mode over a very broad voltage range. When breakdown occurred in these detectors it was through a previously unreported mechanism and at gains, without exception, 5–10 times higher than in their counterparts with substrates. The conclusion of these studies is that the substrate represents the weak link in the chain and should ideally be avoided or at least removed from the high-field regions. In cases where this is not possible, then the multiplication region should be concentrated to the smallest volume around the anodes and maximally suppressed elsewhere. Recipes for achieving this are provided, along with new geometries which permit gas gains in excess of 105to be achieved.
DOI：
10.1007/978-3-642-61247-3
发表时间：
1991-10
期刊：
--
影响因子：
--
作者：
Iu. P. Raizer
通讯作者：
Iu. P. Raizer