Nuclear Physics Studies at Intermediate Energies

将在IUCF冷却器上进行一项实验，研究质子-质子碰撞中的临界介子产生。这项实验所需的设备(包括一个新的环形磁铁和一个新的双臂探测器系统)已经在匹兹堡大学和IUCF建造并进行了测试。新的磁铁将成为冷却器环的永久组成部分。测量不同截面和分析功率的实验将在1991年进行。本文提出了一种利用偏振光束和目标测量完全散射矩阵的后续实验。将开展已获批准的CEBAF从质子产生ETA的实验的开发工作。匹兹堡的努力是在CEBAF大型接受光谱仪内建造围绕目标的漂移室阵列，这一努力需要大量的规划和测试。

An experiment to study threshold pion production in proton-proton collisions will be conducted at the IUCF Cooler. The equipment required for this experiment (including a new ring magnet and a new two-arm detector system) has been built and tested at the University of Pittsburgh and IUCF. The new magnet will become a permanent part of the Cooler ring. The experiment measuring differential cross sections and analyzing powers will run during 1991. A followup experiment measuring the complete scattering matrix using a polarized beam and target is proposed here. Development work for an approved CEBAF experiment in eta electroproduction from the proton will be carried out. The Pittsburgh effort is in building the drift chamber array that surrounds the target within the CEBAF Large Acceptance Spectrometer, an effort requiring significant planning and testing.