Conveners
Polarized ion and lepton sources and targets: 01
- Xiaqing Li (Shandong University)
- Norihiro DOSHITA (Yamagata University)
Description
Conveners: Norihiro Doshita, Xiaqing Li
Spin is a fundamental property of particles and plays a crucial role in particle structure and interactions. In a polarized ion beam, the spins of ions favor a particular direction, which is not only crucial for spin physics research but also beneficial for cutting-edge physics experiments that require high precision. For producing intense polarized ion beams, a Spin Polarized Ion Source...
The Electron-Ion Collider in China (EicC) is a proposed high-intensity facility designed to explore the partonic structure of nucleons and nuclei, particularly in the sea quark region, with unprecedented precision. Its physics program aims to uncover the origin of nucleon mass and spin, image the three-dimensional landscape of partons, study quark-gluon dynamics in nuclei, and search for...
At the JINR accelerator complex, within the polarization research program of the NICA project, the high-intensity SPI source of polarized deuterons and protons and low-energy polarimeters are being developed for the SPI setup at the outlet and behind the 5 MeV/nucleon linear accelerator.
The status, upgrades of the above facilities, future prospects are presented.
[1] G.V. Trubnikov,...
LHC at CERN is the world's highest energy collider, but it cannot accelerate polarized protons like BNL's RHIC. The LHCspin project will install a polarized hydrogen gas target in one of the accelerator rings of the LHC and use a 7 TeV proton beam and the polarized target to advance research into nucleon spin structure. In the first step, the polarized gas target and a simple particle detector...
Recently COMPASS showed an interesting result on the d-quark Sivers TMD PDF via SIDIS process with muon beam and the polarized deuteron polarized target. It showed that the d-quark Sivers asymmetry had almost twice larger than u-quark at high-x region.
In order to understand the d-quark OAM contribution on the nucleon spin structure, further measurements via other processes like a...
The University of New Hampshire (UNH) Nuclear Physics Group (NPG) is planning to run the $b_{1}$ and $A_{zz}$ experiment at JLab in Hall C using an 11.0 GeV, High Luminosity electron beam ($10^{38}~\mathrm{cm}^{-2}\mathrm{s}^{-1}$) with 115 nA beam current, a 5T superconducting magnet, the $ND_{3}$ dynamically polarized target and the HallC stacked spectrometer to study the deuteron spin...
In high-energy nuclear physics, spin plays a crucial role in the composition of matter and the interaction between particles. The Institute of Modern Physics, Chinese Academy of Sciences, plans to develop polarized beams and targets for spin-related studies at the High Intensity heavy-ion Accelerator Facility (HIAF). The target is mainly composed of an atomic beam source, a target chamber and...
He–3/He-4 Dilution Refrigerator is the only device at the moment that allows to obtain an ultra-low temperature (down to 5mK) in a continuous mode (for several months and more). In 1966, one of the world's first He–3/He-4 dilution refrigerators was created in Dubna under the leadership of B.S. Neganov. Since then, more than 10 He–3/He-4 dilution refrigerators for experiments with polarized...
3He/4He Dilution Refrigerator is the only device at the moment that allows to obtain an ultra-low temperature (down to 5mK) in a continuous mode (for several months and more). In 1966, one of the world's first 3He/4He dilution refrigerators was created in Dubna under the leadership of B.S. Neganov. Since then, more than 10 3He/4He dilution refrigerators have been created in the Low Temperature...
The JINR accelerator complex utilizes the SPI source [1] for generating polarized deuteron and proton beams, based on atomic beam technology with accumulation in a charge-exchange plasma ionizer. The traditional collinear scheme has limitations, including increased beam divergence and higher emittance, which reduce generation efficiency.
To address these issues, an design with a T-shaped...
