Revision as of 22:43, 29 September 2022

09/19/22

Investigated non-linearity of peak sensing ADC due to issues arising in energy calibrations and efficiency measurements.

Modified existing calibration code to use non-linear regression to account for ADC.

Calculated ADC dead time for live-time correction to efficiency measurement count rates and calculated dead time per experiment.

Designed holder for Gd foils needed for CaGaS Phase II experiment. To be 3D printed and tested for tolerances.

Printed both parts of the Gd foil holder for CaGaS Phase II.
- Parts fit together adequately considering they're 3D printed and not machined.
- M3 bolts threaded through first part of the holder.
- M3 nuts pressed into the second part of the holder.
- Parts printed out of PETG plastic with low density infill.

Edited rebinning code for energy calibrations for data sets collected with ADC to account for changes in calibration code.
- Energy calibration script now uses 2nd order polynomial regression to account for nonlinearity of ADC
- The coefficients from the regression are passed to another script to rebin ADC data from channel to energy, preserving bin count, but bin width will increase as a function of energy.
  - End goal is to pass coefficients into rebinning function and draw energy calibrated plot in the same script.

Designed Gd₂O₃ powder holder for CaGaS Phase II.
- Have spray on clear coat to seal plastic after printing is complete in hopes that powder will not stick between printed layers when used.

Continued to research live time correction for HPGe count rates and think I have applied the correction correctly at the initial measurement level, which will be propagated through to efficiency calculations.

Researched and tested different integration methods for more accurate measurement of counts in energy peak to compare to Gaussian fit.

@@ Line 25: / Line 25: @@
 * Designed Gd<sub>2</sub>O<sub>3</sub> powder holder for CaGaS Phase II.
-** Have spray on clear coat to seal plastic after printing is complete.
+** Have spray on clear coat to seal plastic after printing is complete in hopes that powder will not stick between printed layers when used.
+* Documented Gd holders in wiki with rendered images and expected use.
 * Continued to research live time correction for HPGe count rates and ''think'' I have applied the correction correctly at the initial measurement level, which will be propagated through to efficiency calculations.