Depolarization effects in optically pumped polarized proton sources

Hinds, E. A.; Cornelius, W. D.; York, R. L.

doi:10.1016/0029-554x(81)90448-1

Cited by 29 publications

(6 citation statements)

References 6 publications

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“…At LAMPF, a 10% duty cycle ECR-based source was built, 35 and a dc source supplies beam for experiments at TRIUMF. A strong magnetic field is required to reduce depolarization, as the atoms rapidly decay to the ground state, by decoupling electron orbital angular momentum L and spin S. 37 The ECR proton source operates in a high magnetic field, and thus the proton beam does not pass through the fringe field of the solenoid, which would produce a large increase in the neutralized beam emittance. The H 0 atoms formed by electron pick-up in the alkalimetal vapor are mainly in nϭ2 or higher excited states.…”

Section: A Ecr-based Oppismentioning

confidence: 99%

Polarized ion sources for high-energy accelerators (invited)

Levy

Zelenski

1998

Review of Scientific Instruments

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Motivated by experimental requirements at high energy accelerators, very large increases in polarized H Ϫ ion source current have been achieved recently. Polarized H Ϫ current of 1 mA dc from the optically pumped source ͑OPPIS͒ and 1 mA pulsed H Ϫ current from the atomic beam source ͑ABS͒ have been demonstrated. High current development of both the ABS and OPPIS is continuing. Pulsed current of more than 10 mA has been proven to be feasible from the OPPIS. An OPPIS is also used in the high precision parity violation experiment at TRIUMF, in which helicity-correlated changes to beam properties must be extremely small.

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Section: A Ecr-based Oppismentioning

confidence: 99%

Polarized ion sources for high-energy accelerators (invited)

Levy

Zelenski

1998

Review of Scientific Instruments

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“…5 The ECR cavity extraction electrodes and neutralizer are both contained within the same high magnetic field so as to reduce the effective emittance increase of the deuteron beam as it enters the magnetic field region of the neutralizer. For that reason it is necessary that charge exchange occurs within a high magnetic field which preserves the electron-spin polarization of the deuterium atom as the atom decays to the ground state.…”

Section: A Schematic Of Dual Oppismentioning

confidence: 99%

Production of polarized negative deuterium ion beam with dual optical pumping

Kinsho

Ikegami

Takagi

et al. 1996

Review of Scientific Instruments

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“…Hence, by passing a polarized atimic hydrogen beam through the cell, the H-current produced in the cell is proportional to the product of the hydrogenic polarization, the electronic polarization of the atoms in the cell, and the cross section for charge pickup from the atomic species in the cell. Akernatively, a fast protin be-can be used, and the H-current is proportional to the square of the polarization of the atoms in the cell and the polarization capture efficiency of the reaction [37,38].…”

Section: Measurement Of Polarizationsat Low Energiesmentioning

confidence: 99%

Sources of polarized ions and atoms

Cornelius

1989

Nuclear Instruments and Methods in Physics Research Section B:

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DISCLAIMERThis report was pmpwed as an rnwourrt of work qmnsored by an Mgerrcyof the United !hma (government, Neither th~United SIaIee (hvernment nor any agerwy thereof, nor any of their employees, makee any wmmnty, enprw or implied, or aseumeean~legal li~bili(y or mepond. hilhy for the wxumcy, completerrees,or umfuhraeoof any irrrormu ion, appemlus, pruduct, or proctoo dhcloeod, or mpmeents that III uie would not infringe priwtely owned richts. Refer. ena Ywmhr to any spaciflc mmmerwial ptuduct, procae, or Mrvia by trade name, trademark, monufactumr, or otherwiee doee not neceeedy consthute or Imply itI endorsement, mown. mendat!on, or fa "orlng by the Unital StaIee Gwerrrmm or any a~rrcy thsmof. The viewI and opintom of authors expreeead herein do not rrsceem,'ily sthte or mft.ct thoee of ttw United St-tee Chvernmont or any h~ncy thereof. @y$cc.ptanc. of thtswtlclo, the publmhcr r4cognlz.s that th~US GOVOWIItl@nt Wt-lnls non.rncluwm royalty.fro~hconte to publllh or r@produco tho published form of thltcontrlbu!,on or to Mow whorl to do so for US. Government purpow Tho 109 Alomo$ NaWnal Lnoorotory roqu~stt that tho pubhsh.r Id@ntlfythisMcI. m work perform4d undo?tho wtpkcl of tho US Oopwtmont of Snorsy

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Depolarization effects in optically pumped polarized proton sources

Cited by 29 publications

References 6 publications

Polarized ion sources for high-energy accelerators (invited)

Polarized ion sources for high-energy accelerators (invited)

Production of polarized negative deuterium ion beam with dual optical pumping

Sources of polarized ions and atoms

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