Versatile data acquisition and control system for high resolution electron spectroscopy
Journal Article
·
· Bulletin of the American Physical Society
OSTI ID:281578
- Univ. of Nevada, Reno, NV (United States); and others
A versatile yet economical PC/XT or AT computer based data acquisition and control system has been developed for high resolution electron spectroscopy. The system includes one 0 to 10 V 16 bit digital to analog converter (DAC) with 0.15 mV resolution, one 32 bit up-counter which is used for data collection and one down-counter for projectile beam normalization. In our case, we utilize two programmable precision DC voltage sources which are driven by the 0 to 10 V DAC to operate two electrostatic electron spectrometers in tandem. The signal from the electron channel detector is recorded by the up-counter whereas beam charge normalization is accomplished by the down-counter connected to a Faraday cup through a nano-ampere current digitizer. The system is programmed in Turbo C to automatically collect experimental data and control the DC voltage sources. Data are stored in a hard disk and can be displayed by a variety of graphic modes on the computer screen. Features also include auto-ranging current monitor, beam threshold setting and control, programmable time delay and different voltage scan modes. This reliable data acquisition system has been successfully applied for high resolution zero-degree autoionization electron measurements, but can also be used for other applications in atomic, chemical physics, surface science etc. The system is currently operational and can be demonstrated during the meeting.
- OSTI ID:
- 281578
- Report Number(s):
- CONF-9305421--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 38; ISSN 0003-0503; ISSN BAPSA6
- Country of Publication:
- United States
- Language:
- English
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