CaGaS Phase II

CaGaS Phase II (Capture Gamma Spectroscopy) is a repeat of capture gamma energy spectroscopy experiments performed during the summer of 2021 in the ISU clean room. The purpose of revisiting the capture gamma experiment is to use a new, higher activity ²⁵²Cf source (U2-622) and to investigate different thicknesses of Gadolinium foils and the effect on the high energy photon flux produced. This work is being performed in support of the main conversion process for the In-Situ Positron Annihilation Spectroscopy experiment being designed and performed by INL staff and external collaborators.

Impromptu To Do List

• Investigate the difference with/out PUR (pile up rejection) enabled on spec amp
  • Look for differences with high count rate source

• Measure up as close to Gd as possible and then ~12" away to calculate the adjustment factors necessary for coincidences

CH_785NADC

I) CaGaS Phase II Associated Equipment and Experimental Setup

Polyethylene

CH_Poly_Density

Radioactive Sources

CH Cf252 Sources

CH Calibration Sources

Electronics Chain

CH_HPGe_Electronics_Chain

Gadolinium

CH Gd Holders

II) Neutron Attenuation Measurements

Discriminator Dual Pulsing Investigation

CH Discriminator Dual Pulsing

Initial Measurements

CH He3 Attenuation Measurements

Revisited Measurements

CH He3 Attenuation Measurements: 3 Different Cf252 Sources

IV) HPGe Measurements

PAS HPGe Detector

CH HPGe Efficiency

CH DAQ2 Energy Calibration

V) CaGaS Phase II

CH Phase II Run Plan

Previous Work

CaGaS Phase I

Useful Resources

CH_Code_Repository

CH ROOT Nonuniform Binning

CH_PAS_Master_Logbook

CH_Isotope_Table

CH_Reading_CODA_Data

CH NIM Bin Repair

CH Meeting Notes

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PAS Experiment