论文标题
塑料闪烁体计数器的定时分辨率通过串联连接的辐射损坏的sipm读取
Timing resolution of a plastic scintillator counter read out by radiation damaged SiPMs connected in series
论文作者
论文摘要
本文讨论了辐射对SIPM的损害对具有串联SIPM读数的塑料闪光灯计数器的性能的影响，重点是定时测量。由$ 120 \ times 40 \ times5〜 \ mathrm {mm}^3 $闪烁瓷砖组成的柜台的表演，读出了两组来自短侧串联的advansid的六个sipms的六个sipms，以呈现在短侧的串联连接，以在各种照射下的sipms组合。首先，从$^{90} $ sr源到达$φ__\ mathrm {e^ - } \大约3 \ times 10^{12}〜\ mathrm {cm}^{cm}^{ - 2} $。柜台的定时分辨率逐渐随着黑电流的增加而逐渐恶化。当计数器从30 $^\ Circs $ c降低到10 $^\ Circ $ c时，深色电流和恶化会降低。其次，用反应堆中子照射33个sipm。研究了由具有不均匀损伤水平的串联连接sipm读取的计数器的特征。当SIPMS的辐照不均匀时，信号脉冲高度，时间响应和时机分辨率取决于计数器中的命中位置。
This paper discusses the effects of radiation damage to SiPMs on the performances of plastic scintillator counters with series-connected SiPM readout, focusing on timing measurements. The performances of a counter composed of a $120 \times 40 \times5~\mathrm{mm}^3$ scintillator tile read out by two sets of six SiPMs from AdvanSiD connected in series attached on the short sides are presented, for different combinations of SiPMs at various levels of irradiation. Firstly, six SiPMs were equally irradiated with electrons from $^{90}$Sr sources up to a fluence of $Φ_\mathrm{e^-}\approx 3 \times 10^{12}~\mathrm{cm}^{-2}$. The timing resolution of the counter gradually deteriorated by the increase in dark current. The dark current and the deterioration were reduced when the counter was cooled from 30$^\circ$C to 10$^\circ$C. Secondly, 33 SiPMs were irradiated with reactor neutrons. The characteristics of counters read out by series-connected SiPMs with non-uniform damage levels, were investigated. The signal pulse height, the time response, and the timing resolution depend on the hit position in the counter, when SiPMs' irradiation is not uniform.
