Buck A, Zeil K, Popp A, Schmid K, Jochmann A, Kraft S D, Hidding B, Kudyakov T, Sears C M S, Veisz L, Karsch S, Pawelke J, Sauerbrey R, Cowan T, Krausz F, Schramm U
Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany.
Rev Sci Instrum. 2010 Mar;81(3):033301. doi: 10.1063/1.3310275.
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.
我们报告了针对通常用于检测基于激光等离子体加速方案产生的相对论电子的八种不同闪烁屏，进行的具有高动态范围的新电荷校准和线性测试。绝对电荷校准是在德累斯顿的ELBE直线加速器上使用皮秒电子束完成的。在我们的装置中，最灵敏的闪烁屏（柯达BioMax MS）的检测下限为10 fC/mm² 。这些闪烁屏在几个数量级上呈现出线性的光子 - 电荷依赖性。对于一些闪烁屏，发现饱和效应在约10 - 100 pC/mm² 左右开始出现。此外，使用了一个恒定光源作为光度参考，以简化一次性绝对校准向不同实验装置的转换。
