Target NIM Paper

Introduction

• The History of 3He Target.
• Why we use polarized 3He target as a quasi-free polarized neutron target.
• Different types of 3He target: pumping techniques and comparison.
• The use of high pressure 3he target cell in Jefferson Lab hall A.

Overview of 3He target setup in Jefferson Lab

• Setup in EEL Building
• Setup in Hall A for E06-010
  • Holding field coil
  • Oven
  • Reference cell

3He cell used in Hall A

• 3He cell manufacture
• Cell Characterization
  • Density measurement
  • Wall thickness measurement

Polarimetry

• NMR polarimetry
  • Water calibration of NMR
  • Internal temperature measurement
• EPR polarimetry

Special Techniques

• Optics design
• Automatic spin flip
• Optical setup without direct phase compensation

Future Upgrage

• Spin flip using field flip
• Modifications to the target cell.