A sixteen channel peak sensing ADC for singles spectra in the FERA format

Conference · Sun Oct 01 04:00:00 EDT 1995

OSTI ID:410176

Maier, M R; Ludewigt, B A; Rossington, C S; Yaver, H; Zaninovich, J J

To read out multi-element small X-ray detectors for X-ray fluorescence application with synchrotron radiation one needs the capability to record multiple singles spectra for each detector element at high rates. We have developed a sixteen channel 11 bit peak sensing ADC in a CAMAC module. We use the FERA readout bus to place the data into a commercially available histogramming module developed to generate multiple histograms from FERA ADCs. The sixteen channels digitize shaped pulses from the detectors without external gating. The digitizing time is 8 {mu}sec, the peak acquisition time is {>=} 2 {mu}sec. The module contains a LiFO to permit block transfers in order to minimize dead times associated with the readout. There is a common CAMAC controlled analog threshold for noise suppression and a 16 bit mask to enable or disable individual ADCs. Differential non-linearity is less than +8% / -4%. A {gamma}-ray spectrum collected using this ADC is presented.

• Research Organization: Lawrence Berkeley National Lab., CA (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 410176
• Report Number(s): LBL--37124; CONF-951073--27; ON: DE97000918
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
ANALOG-TO-DIGITAL CONVERTERS
CAMAC SYSTEM
DATA ACQUISITION SYSTEMS
DESIGN
SI SEMICONDUCTOR DETECTORS
TESTING