CH Task List

Notes from biweekly meetings

5/27/21

To Do List

• Add dual timer configuration to plateau page (X)

• Continue to fine tune operating point of NaI detector and upload plateaus/signal:noise plots (X)
  • Overhauled analysis code throughout the week of 6/1/21 to calculate all rates, uncertainties, background subtractions, and signal to noise ratios. Code now generates 3 plots with all errors included -> I need to create a code repository (could use github)

• NaI attenuation measurements (with BorAl and try different types of poly (unborated, purple, green)) -> working with He3 instead

• Begin experimental setup in clean room (X)

• Test HPGe detector -> Work has begun on this by a colleague

• Complete latest assigned training module (X)

• Speak to Roy Dunker who has agreed to let us use a second HPGe detector for back-to-back measurements in later phase of feasibility studies at ISU (X)

• Move painted lead bricks to clean room (X)

• Linked manual for HPGe detector to wiki pages (X)
  • Add files sent by collaborator on HPGe detector page

• Rerun 1000V source in plateau data, looks like a discontinuity in the data set starting at the 150mV threshold. Could be my mistake, need to verify. (X)
  • Verified that there is a 3x drop in Hz between 135mV-155mV threshold level at 1000V. Unsure what could cause this (X)

• Finish 1100V source out data collection (X)

• Rebuild computer with updated operating system and rebuilt with newest version of root -> moved to next list

• Run 950V plateau data due to discontinuity in data sets 1000V & 1050V (X)

• Create wiki page for DD generator page
  • Include shielding papers and manuals -> will talk to Joe about this

• Paul got his tape measure unstuck from the clean room (X)
  • We're all very proud of him

6/10/21

To Do List

• Finish attenuation measurements (X) and data analysis for He3 detector (X)
  • Virgin poly (X)

• Continue experimental set up (X)

• Model cradle for NaI detector for lead tube (X)

• Talk to Roy Dunker about HPGe software (X)
  • Have CDs for the software, colleague will attempt to get it working

6/24/21

To Do List

• Start mcnp simulations (X)
  • Find level of boron doping in poly through simulations

• Print NaI cradle (X)
  • Cradle is printed, need to pick up (X)

• Photon attenuation measurements for lead with NaI
  • Start with sheets, then go to one or two bricks
    • boral around all sides and make exit with lead bricks

• BorAl attenuation measurements for neutrons with He3 (X)
  • Thermalizing box, with and without an extra sheet of poly between source and detector (not necessary)
    • Green borated poly and regular poly (X)

• Rebuild computer with updated operating system and rebuilt with newest version of root (X)

• Arrange meeting with Jeff Burggraf regarding usage of HPGe detector as he has previously used this exact detector (not necessary)

• (if time) Measure background with He3 and NaI in shielded tunnel for experimental setup

• Design the thermalizing box in some 3D modeling software to allow for easy manipulation without cutting extra poly (X)
  • Wiki page has been created in regards to this (X)

9/7/21

• Longer Cf252 measurements (Gd in & out) (X)

• More lead in front of Cf252 (maybe in pig) (X)

• He3 tube measurements (maybe) (X)

• Finish isotope table (X)

• Solved binning issues regarding calibrated spectrum (X)

9/23/21

• HPGe Efficiency

• Print cradles for HPGe detector

• Draw electronics chain for HPGe detector with each value notated

• Find dead time using upper and lower part of dual timer (Live time)

11/16/21

• Check attenuation measurements for Cf252 through poly to look for double counting

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