外文翻譯---核譜脈沖數(shù)字成形處理-其他專業(yè)-資料下載頁
2025-01-19 09:36本頁面
【導(dǎo)讀】子產(chǎn)生的相關(guān)過程時(shí),彈道虧損隨著探測器的電荷收集時(shí)間的變化而產(chǎn)生。的統(tǒng)計(jì)漲落決定，在非常高的能量時(shí)，彈道虧損可能會占主導(dǎo)地位。直徑，高效率的探測器時(shí)，彈道虧損的影響將增大。器收集產(chǎn)生電子的改變將導(dǎo)致振幅的變化。為了克服這個(gè)問題，科學(xué)界已經(jīng)提。集時(shí)間長，過濾平的水平隨上升時(shí)間的變化時(shí)相對免疫的。延遲線體積粗大，造成嚴(yán)重溫度變化的增益，當(dāng)高的延遲時(shí)間的比例上升。時(shí)將有很高的成本，并可能不容易在時(shí)間尺度間變化。們并不被認(rèn)為是理想電路原件為脈沖處理器能量的通道。決定于層疊階段的數(shù)量，信號的上升時(shí)間是固定的，延遲是存在的。如果積分時(shí)間延長超出了在預(yù)設(shè)的脈沖響應(yīng)。的時(shí)間最長的預(yù)過濾器脈沖響應(yīng)寬度，任何彈道虧損的靈敏度都將被淘汰。延誤，古爾丁和蘭迪斯糾正方法使用延遲測量補(bǔ)償彈道虧損。在一般情況下，欣肖和蘭迪斯的方法是更好地為修正彈道虧損，但無法。良好的校正損失。
【正文】 stant T of the input to the shape peaking time tp of the semigaussian signal ratio is, the longer the amplitude degradation will then be. From that, to reduce BD for applications in the gamma ray energy range 1 MeV, large coaxial detectors would be used with unipolar shapers producing output pulses peaking at 12 μs or more and therefore with total pulse widths of about 30–40 ms, which implies an unacceptable low throughput of the spectrometer. BD corrector methods have then been devised . These methods intend to increase the spectrometer throughput yet preserving the large detector energy resolution. Since BD is roughly proportional to ( ptd /tp) , ptd being the peaking time delay which acpanies the ballistic deficit, the Goulding and Landis correcting method uses the delay measurement to pensate BD. The Hinshaw and Landis method is 5 based on measuring the difference in the BD for two shapers having different peaking times, typically a unipolar semigaussian and a bipolar one. A correction based on this difference is then added to the output signal from the slower shaping channel. In general, the Hinshaw and Landis method is better for ballistic deficit correction but quite ineffective for trapping loss correction, while the Goulding and Landis method is less effective for ballistic deficit correction but can provide excellent correction for trapping losses.
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