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Sep 24 – 29, 2023
US/Eastern timezone

The SpinQuest (E1039) experiment’s polarized target system

Sep 26, 2023, 2:30 PM
30m
JuniorA1-A2 (Durham Convention Center)

JuniorA1-A2

Durham Convention Center

Talk Polarized Ion and Lepton Sources and Targets Polarized Ion and Lepton Sources and Targets

Speaker

Muhammad Farooq (National Centre for Physics, Islamabad, Pakistan, and University of Virginia, USA)

Description

The SpinQuest experiment at Fermilab aims to measure the Sivers asymmetry for the light sea quarks in the longitudinal momentum fraction range of 0.1 < $x_B$ < 0.5 from the Drell-Yan process. A nonzero Sivers asymmetry measurement would be indicative of a nonzero orbital angular momentum contribution from the sea quarks. The SpinQuest experiment uses the proton beam from Fermilab’s 120 GeV main injector, which will provide about $10^{12}$ protons per second during a 4.4 seconds spill. The SpinQuest polarized target uses a superconducting split-pair magnet with an operating magnetic field of 5T with transversely polarized NH$_3$ or ND$_3$ targets (8cm long target cells). The maximum intensity that the target can handle will be determined during beam-target commissioning. As proposed SpinQuest will be the highest integrated luminosity around 2 x $10^{42} cm^{-2}$ ever on a solid polarized target. The helium-4 evaporation refrigerator operates at 1 Kelvin using high-powered evaporation from a roots stack with a pumping rate of nearly 17,000 $m^3$/hr. The anticipated average target polarizations of 80\% for protons and 32\% for deuterons will be measured using three NMR coils equally spaced apart in the target cell. An overview of the SpinQuest target system will be presented.

Primary author

Muhammad Farooq (National Centre for Physics, Islamabad, Pakistan, and University of Virginia, USA)

Presentation materials