Enhanced polarization of low pressure 3He through metastability exchange optical pumping at high field
| Autor: | C.S. Epstein, J. G. Alessi, Alexander Pikin, Edward Beebe, John Ritter, M.M. Musgrave, James Maxwell, Grigor Atoian, Ross Milner, A. N. Zelenski |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Nuclear and High Energy Physics Ion beam Physics::Instrumentation and Detectors Polarization (waves) 01 natural sciences Ion source 010305 fluids & plasmas Magnetic field Optical pumping Metastability 0103 physical sciences Cathode ray Physics::Accelerator Physics Atomic physics 010306 general physics Relativistic Heavy Ion Collider Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 959:161892 |
| ISSN: | 0168-9002 |
| DOI: | 10.1016/j.nima.2019.02.019 |
| Popis: | We report high steady-state nuclear polarization of 1 torr 3 He gas nuclei via metastability exchange optical pumping at magnetic fields above 2 T. The introduction of highly polarized 3 He gas into Brookhaven’s Electron Beam Ion Source would enable a new, polarized 3 He ion source for use at the Relativistic Heavy Ion Collider and a future Electron–Ion Collider facility. By adapting recent developments in high field metastability exchange optical pumping for higher pressure gas, we have successfully polarized 1 torr 3 He sealed cells in the EBIS solenoid. Through careful manipulation of the RF discharge parameters, polarizations above 80% were attained at 2, 3 and 4 T, with 89% being reached at 3 T with a 664 s relaxation time. |
| Databáze: | OpenAIRE |
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