Electronics Upgrade of High Resolution Mass Spectrometers.

Mcintosh, J. ; Cordaro, J.

Technical Information Center Oak Ridge Tennessee

关键词: Mass spectrometers;    Magnets;    Resolution;    Ion sources;    Analyzers;   

RP-ID  :  DE2008928470

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

High resolution mass spectrometers are specialized systems that allow researchers to determine the exact mass of samples to four significant digits by using magnetic and electronic sector mass analyzers. Many of the systems in use today at research laboratories and universities were designed and built more than two decades ago. The manufacturers of these systems have abandoned the support for some of the mass spectrometers and parts to power and control them have become scarce or obsolete. The Savannah River National Laboratory has been involved in the upgrade of the electronics and software for these legacy machines. The Electronics Upgrade of High Resolution Mass Spectrometers consists of assembling high-end commercial instrumentation from reputable manufacturers with a minimal amount of customization to replace the electronics for the older systems. By taking advantage of advances in instrumentation, precise magnet control can be achieved using high resolution current sources and continuous feedback from a high resolution hall-effect probe. The custom equipment include a precision voltage divider/summing amplifier chassis, high voltage power supply chassis and a chassis for controlling the voltage emission for the mass spectrometer source tube.