轴向排列晶体用于未来直线对撞机产生正电子的优点
Advantages of axially aligned crystals used in positron production at future linear colliders
摘要：
由2至10 GeV的电子沿钨晶体的轴排列的电子-光子簇射的特性<111>进行了比较与非晶钨。在这个能量范围内，如已知的，在最佳靶厚度处的正电子产额在晶体情况下仅大百分之几。然而，在晶体中的能量沉积的量被证明比在提供相同正电子产额的非晶靶中的能量沉积的量低得多（低20 - 50%），而峰值能量沉积密度在两种情况下近似具有相同的量值。
英文摘要：
The characteristics of the electron-photon showers initiated by 2 to 10 GeV electrons aligned along the <111>-axis of tungsten crystals are compared with those for the amorphous tungsten . In this energy range, as known, the positron yield at the optimal target thicknesses is larger in a crystal case only by several percent. However, the amount of the energy deposition in a crystal turns out to be considerably (by 20 - 50 %) lower than in an amorphous target providing the same positron yield, while the peak energy-deposition density is approximately of the same magnitude in the both cases.
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