Absolute charge calibration of scintillating screens for relativistic electron detection
Absolute charge calibration of scintillating screens for relativistic electron detection
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DOI：
10.1063/1.3310275
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发表时间：
2010-03-01
影响因子：
1.6
通讯作者：
Schramm, U.
中科院分区：
文献类型：
--
作者：
Buck, A.;Zeil, K.;Schramm, U.
我们报告了新的电荷校准和线性测试与高动态范围的八种不同的闪烁屏通常用于检测相对论电子从基于激光等离子体的加速方案。绝对电荷校准是在德累斯顿ELBE直线加速器上用皮秒电子束完成的。我们设置的最灵敏闪烁屏（KODAK Biomax MS）的检测下限为10 fC/mm(2)。屏幕显示出几个数量级的线性光子-电荷依赖关系。一些屏幕的饱和效应开始于10-100 pC/mm(2)左右。此外，采用恒定光源作为光度参考，以简化一次性绝对校准到不同实验设置的转移。
We report on new charge calibrations and linearity tests with high-dynamic range for eight different scintillating screens typically used for the detection of relativistic electrons from laser-plasma based acceleration schemes. The absolute charge calibration was done with picosecond electron bunches at the ELBE linear accelerator in Dresden. The lower detection limit in our setup for the most sensitive scintillating screen (KODAK Biomax MS) was 10 fC/mm(2). The screens showed a linear photon-to-charge dependency over several orders of magnitude. An onset of saturation effects starting around 10-100 pC/mm(2) was found for some of the screens. Additionally, a constant light source was employed as a luminosity reference to simplify the transfer of a one-time absolute calibration to different experimental setups.