Negative-ion Research and Source Development

该合同将为宾夕法尼亚大学的负离子源和AMS开发项目提供为期三年的支持和维护。该计划的主要目标是：(1)扩展目前正在进行的碳和铝多原子和分子离子的研究。特别是，为了寻找新的双负簇，利用开发的方法来检测和验证双负碳簇，在串联范德格拉夫加速器中加速。(2)修订、扩充《负离子烹饪书》，准备正式出版。关于多原子和分子离子以及一些常见化合物和矿物的负离子特征的许多新数据将被包括在内。(3)继续开发三极管源，预计将比目前的高强度源产生一个数量级的电流。这种源的可用性将对包括核科学在内的几个领域产生影响，在核科学中，它应该能够在RHIC中加速更高强度的相对论重离子束。(4)发展加速器质谱（AMS）新技术。＊＊＊

9417364 Middleton This award will support and maintain the negative-ion source and AMS development program at the University of Pennsylvania for a period of three years. The principal objective of the program are: (1) to extend the present studies of polyatomic and molecular ions that are currently underway with carbon and aluminum. In particular, to search for new double-negative clusters, utilizing the methods developed to detect and veridy double-negative clusters of carbon by acceleration in the tandem Van de Graaff accelerator. (2) to revise, expand, and prepare the Negative Ion Cookbook for formal publication. Much new data would be included on polyatomic and molecular ions and on the negative-ion signatures of some common compounds and minerals. (3) Continue to develop the triode source that is expected to produce an order of magnitude more current than the present high-intensity source. The availability of such a source will have impact in several fields including nuclear science where it should enable higher intensity relativistic heavy-ion beams to be accelerated in RHIC. (4) develop new techniques for accelerator mass spectroscopy (AMS). ***