Finding Resolution for PIPS Detector Using Am-241 Source

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SUMMARY

The discussion focuses on determining the resolution for a PIPS (Passivated Implanted Planar Silicon) detector using an Am-241 source, which presents two alpha-peaks at 5442.80 keV and 5485.56 keV. The user has experience with Ge detectors but finds the close proximity of the Am-241 peaks challenging. They identify two potential adjustments to improve resolution: modifying the gain at the amplifier and adjusting the zero level of the ADC. However, increasing the gain leads to peak loss, and adjusting the zero level has no observable effect on the peaks.

PREREQUISITES
  • Understanding of PIPS detector technology
  • Familiarity with alpha spectroscopy and energy peaks
  • Knowledge of amplifier gain settings
  • Experience with ADC (Analog-to-Digital Converter) calibration
NEXT STEPS
  • Research methods to optimize PIPS detector resolution
  • Learn about ADC zero offset adjustments and their impact on peak detection
  • Investigate alternative amplification techniques for alpha spectroscopy
  • Explore LabVIEW integration for data analysis in spectroscopy
USEFUL FOR

Researchers and technicians working with radiation detection, particularly those involved in alpha spectroscopy and PIPS detector optimization.

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Homework Statement


Determining the resolution for a new PIPS (Passivated Implanted Planar Silicon) detector. I've done this earlier for a Ge detector, but that was easy because the two peaks of the Co-60 are far apart.

For this measurement we use the normal Am-241 source which has two alpha-peaks at 5442.80 keV and 5485.56 keV. The only things I now I can do for raising the resolution is adjusting the gain at the amplifier and adjusting the zero level of the ADC.

I can't turn the gain higher, because the peak will fall of the spectrum. Adjusting the zero level apparently does nothing to the peaks.

The electronics are just: PIPS-preamp-amp-ADC-Data system-Labview
 
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