SOFTWARE DEVELOPMENTS FOR PROCESSING CIRCULARLY SYMMETRIC 2D DIFFRACTION/SCATTER

这个子项目是许多研究子项目中利用 资源由NIH/NCRR资助的中心拨款提供。子项目和 调查员(PI)可能从NIH的另一个来源获得了主要资金， 并因此可以在其他清晰的条目中表示。列出的机构是 该中心不一定是调查人员的机构。 我们的数据处理程序(以前称为MarParse)获得了一个新名称SasTool，以反映其专门为小角度散射研究开发的高级功能，并扩展了对生成16或32位TIFF图像的任何2D探测器的支持。SasTool通过几个步骤的数值数据处理将2D原始图像转换为以I(Q)和Q表示的通用ASCII数据格式，包括统计评估和背景减去。最近的增强包括1)能够根据离群值传输的光束强度来排除不良图像，当样本等分在光束中振荡时意外地包含气泡时，该强度会更高；2)开发了Linux版本的SasTool，消除了用于将Linux文件服务器上的数据文件映射到PC网络的相当慢的Samba协议，在PC网络中，PC版本的SasTool处理数据。由于我们的数据收集和文件服务器计算机都运行Linux，Linux SasTool还将促进在不久的将来将数据分析计划整合到数据收集过程中。3)图像内去ZZING，而不是通过比较多个图像和拒绝异常值来去ZZING。像内去ZZING功能在方位向积分时拒绝通常由同轴射线命中产生的离群值像素。SasTool通过帮助用户以更及时的方式计划下一个实验条件，为高效的数据收集做出了贡献。该软件已经在我们的互联网网站上提供，自2007年8月1日我们开始记录下载以来，来自11个国家和地区49个机构的科学家已经下载了208次(其中149次是自2009年1月1日以来)。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Our data processing program (previously called MarParse) has received a new name SasTool to reflect its advanced features specifically developed for small angle scattering studies and extended support of any 2D detector generating 16 or 32 bit TIFF images. SasTool converts the 2D raw images into a universal ASCII data format expressed in I(Q) vs Q through several steps of numerical data processing, including statistical evaluation and background subtraction. Recent enhancements include 1) the ability to exclude bad images on the basis of outlier transmitted beam intensities which would be higher when a sample aliquot accidentally contained air bubbles when it is being oscilated in the beam; 2) the development of a linux version SasTool, eliminating rather slow Samba protocal for maping data files on the linux file server to a PC network where the PC version of SasTool processes data. The linux SasTool will also facilitate planned integration of the data analysis into the data acquistion process in near future since both of our data collection and file server computers run linux. 3) in-image dezingering as opposed to dezingering by comparing multiple images and rejecting outliers. The in-image dezingering feature rejects outlier pixels, typically produced by cosimic ray hits, upon azimuthal integration. SasTool has contributed to highly effective data collection by facilitating the user to plan the next experimental conditions in a much more timely fashion. The software has been made available on our internet web site, and there have been 208 downloads (of which 149 were since January 1, 2009) by scientists from 49 institutions in 11 countries since August 1, 2007, when we began recording downloads.