Conceptual Design of a Polarized 3He Target for the CLAS12 Spectrometer

2019/11/15 by Maxwell, James, Milner, Richard
#FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Nuclear Experiment (nucl-ex)

paper · doi:10.48550/arxiv.1911.06650

Abstract

We present a conceptual design for a polarized ³He target for Jefferson Lab's CLAS12 spectrometer in its standard configuration. This two-cell target will take advantage of advancements in optical pumping techniques at high magnetic field to create 60% longitudinally polarized ³He gas in a pumping cell inside the CLAS12 5 T solenoid. By transferring this gas to a 20 cm long, 5 K target cell, a target thickness of 3 × 10^{21 3}He/cm² will be produced, reaching the detector's specified maximum luminosity with a beam current of 2.5 μA.

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