舒适的新梁极光计，以寻找带电颗粒的电偶极矩

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舒适的新梁极光计，以寻找带电颗粒的电偶极矩

A New Beam Polarimeter at COSY to Search for Electric Dipole Moments of Charged Particles

论文作者

Müller, F., Javakhishvili, O., Shergelashvili, D., Keshelashvili, I., Mchedlishvili, D., Abusaif, F., Aggarwal, A., Barion, L., Basile, S., Böker, J., Canale, N., Ciullo, G., Dymov, S., Felden, O., Gagoshidze, M., Gebel, R., Demary, N., Grigoryev, K., Grzonka, D., Hahnraths, T., Hejny, V., Kacharava, A., Kamerdzhiev, V., Karanth, S., Kulikov, A., Lehrach, A., Lenisa, P., Lomidze, N., Lorentz, B., Macharashvili, G., Magiera, A., Metreveli, Z., Nass, A., Nikolaev, N. N., Nioradze, M., Pesce, A., Poncza, V., Prasuhn, D., Pretz, J., Rathmann, F., Saleev, A., Sefzick, T., Senichev, Yu., Shmakova, V., Slim, J., Soltner, H., Stephenson, E., Ströher, H., Tabidze, M., Tagliente, G., Uzikov, Yu., Valdau, Yu., Wagner, T., Wrońska, A., Wüstner, P., Żurek, M.

论文摘要

描述了基于无机溶液闪烁体的量热偏振仪。它已设计用于在存储环中使用，以搜索带电颗粒（例如质子和Deuteron）的电偶极矩（EDM）。它的开发和首次使用是在Forschungszentrumjülich的冷却器同步器（COZY）上，具有0.97 GEV/C偏振杜特龙，这是一种适合EDM搜索的粒子和能量。搜索需要具有高效率，大分析能力和稳定的操作特性的偏振仪。对于典型的束矩（约1 GEV/c），质子或依特子散射从碳靶标的向前角成为分析反应的几乎最佳选择。此处描述的偏振仪由52个液体检测器模块组成，该模块在4个对称块中排列（向上，向下，左，右），用于在塑料闪烁体背后进行能量测定，以通过能量损失来鉴定粒子。当前设置的调试结果表明，偏振仪准备在Deuteron上首次直接搜索EDM，该北极星计划在未来两年内在Cozy进行。

A calorimetric polarimeter based on inorganic LYSO scintillators is described. It has been designed for use in a storage ring to search for electric dipole moments (EDM) of charged particles such as the proton and deuteron. Its development and first use was on the Cooler Synchrotron (COSY) at the Forschungszentrum Jülich with 0.97 GeV/c polarized deuterons, a particle and energy suitable for an EDM search. The search requires a polarimeter with high efficiency, large analyzing power, and stable operating characteristics. With typical beam momenta of about 1 GeV/c, the scattering of protons or deuterons from a carbon target into forward angles becomes a nearly optimal choice of an analyzing reaction. The polarimeter described here consists of 52 LYSO detector modules, arranged in 4 symmetric blocks (up, down, left, right) for energy determination behind plastic scintillators for particle identification via energy loss. The commissioning results of the current setup demonstrate that the polarimeter is ready to be employed in a first direct search for an EDM on the deuteron, which is planned at COSY in the next two years.

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