Speaker
Description
Polarized targets are essential tools in probing nucleon spin structure within high-energy and nuclear physics experiments. The SpinQuest polarized target system at Fermilab includes key components such as a cryogenic evaporation refrigerator for high-power cooling at 1 K, a roots pump stack with 17000 m3/hour of pumping capacity, a microwave generator, and NMR system. The polarization is achieved using the DNP (Dynamic Nuclear Polarization) technique with 5T magnetic field and an extended interaction oscillator (EIO) microwave tube capable of producing 140 GHz. An ammonia target is used for both proton (spin 1/2) and deuteron (spin 1) as well as neutron (spin 1/2) polarization. A Q meter based nuclear magnetic resonances (NMR) system is utilized to measure the polarization over the course of the experiment. The SpinQuest polarized target system has achieved well over 90% polarization with solid NH3 and has completed a set of target commissioning runs and taken some production data. An analysis of the target polarization under high proton intensity will be presented in this talk.
| Track | 2: Polarized deep-inelastic physics |
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