Pol He-3 Target Information GEn

Target Operator Instructions

• PolHe3 Target Training Slides [1]
• PNMR Training slides
• How to bring up relevant target GUIs
• Polarized He3 Target Operational Restrictions (raster, beam current limits, etc)
• Procedure for Moving Between Target Cells
• Reference Cell Fill Procedure

Checklists

• Checklist before starting Target Work inside the Enclosure REVIEW THIS PAGE
• Backout Checklist after Hall Access for Target Work REVIEW THIS PAGE
• Backout Checklist after Target Work inside Enclosure REVIEW THIS PAGE

Reference Cell Information

• Documents from Todd?

Production Target Cell Information

PolHe3 Polarization Citation/Reference Link

Final Cell polarizations and supporting documentation is (will be) on the Hall C DocDB
  https://hallcweb.jlab.org/doc-private/ShowDocument?docid=1182
Use that URL as a citation/reference in papers.

Additional Details

Nominal Cell Status summary slide 

• Any cells that are production ready need to be flagged as such

• Any cells that have seen beam should be flagged with the date range

• Production cell target chamber wall thickness measurement location (JLab Measurements)

• Production cell target chamber wall thickness measurement location (UVa Measurements)

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Currently Installed Cell

• Briana

  • Re-Installed in target: 08/21/2020
  • Originally Installed in target: Cell for Initial testing 12/15/2019 to 01/04/2020
  • Characterization Document: Media:Production_Cell_Info_-_Cell_Briana.pdf

Cells Being Readied for Installation

• Tommy -- next cell; being remounted

  • Installed in target: (Soon ready for install; Planned for next Production Cell)
  • Characterization Document: Media:Production_Cell_Info_-_Cell_Tommy.pdf

• Butterball

  • Installed in target: (Future Production Cell)
  • Characterization Document: Media:Production_Cell_Info_-_Cell_Butterball.pdf

Older Installed Cells

• Austin

  • Installed in target: 03/20/2020 to 8/21/2020
  • Characterization Document: Media:Production_Cell_Info_-_Cell_Austin.pdf

• Big Brother

  • Installed in target: 02/12/2020 to 03/13/2020
  • Characterization Document: Media:Production_Cell_Info_-_Cell_Bigbrother.pdf

• Dutch

  • Installed in target: 01/04/2020 to 02/10/2020
  • Characterization Document: Media:Production_Cell_Info_-_Cell_Dutch.pdf

• Fulla

  • Installed in target: November 2019 (Backup Cell)
  • Characterization Document: Media:Production_Cell_Info_-_Cell_Fulla.pdf

Addition Documentation

• Spreadsheet from Chris Jantzi (July 8, 2020) : Media:A1n Cell Characteristics - 08Jul2020.xlsx
• Media:Target_Summary_-_Wall_Thickness.xlsx
• Mingyu Chen (March 22, 2021): Media:Production_Cell_Info_-_Pumping_Chamber_Wall_Thickness.pdf
• "Frequency shifts in the EPR spectrom of 39K due to spin-exchange collisions with polarized 3He and precise 3He polarimetry" (Kappa_0) Paper: arXiv link, Local copy (16Oct2021)

Additional Documentation

• Info on Kepco Power Supplies
• EEL Target Lab Main Page
• 2008/9 Hall A Pol 3He Target Page

Target CAD Files/Photos

• Document Control Group
  • Use 'Advanced Search Options': Category='hall c', Document number='67507'

• Selected Target Shop Drawings
  • Target Ladder
  • Carbon Foil Mount Plate
    • 7 foils spaced 2.625" (6.667 cm) apart
    • Upstream entrance window should be at z=-30.0cm (based off 67507-00017-1.pdf, 67507-00014.pdf, 67507-00024-1.pdf)
  • Target Oven
  • Platform and coils
  • Carbon Foils

• Photos of Target Setup (google drive link)
• CAD Models from Bert
• JT files

Manuals

• Kepco Power supply (and target Field) information
  • Note on KEPCO power supplies
• SR844 Stanford Research Systems RF Lockin Amplifier Manual
• GPIB-ENET/100 Manual
• Perkin Elmer 7265 Lockin Manual
• Raytum Laser configuration file (HCLOG 3745303
• iSeries CNi32 Temperature controller (4-wire RTD)