Progress on Test EBIS and the Design of an EBIS-Based RHIC Preinjector

Alessi, J.; Beebe, E.; Gould, O.; Kponou, A.; Lockey, R.; Pikin, A.; Prelec, K.; Raparia, D.; Ritter, J.; Snydstrup, L.

doi:10.1109/pac.2005.1590435

Cited by 4 publications

(9 citation statements)

References 6 publications

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“…The pumping and test cells were connected by a glass transfer tube with an all-glass valve near the pumping cell to control gas flow. To ensure gas purity in the cells, the system was baked under vacuum before 3 He was introduced, and after filling to near 1 torr, an SAES ST172 getter pump actively removed contaminants which leaked into the volume. Figure 1 shows a simplified diagram of our MEOP polarizing apparatus.…”

Section: Apparatusmentioning

confidence: 99%

“…The addition of a polarized 3 He ion source to the relativistic heavy ion collider (RHIC) at Brookhaven National Laboratory (BNL) would enable a new program of measurements with an effective polarized neutron beam, the merits of which become particularly attractive with a future electron-ion collider [1]. A proposal to realize such a polarized neutron source [2] leverages the electron beam ion source (EBIS) currently in use at BNL [3].…”

Section: Introductionmentioning

confidence: 99%

“…A proposal to realize such a polarized neutron source [2] leverages the electron beam ion source (EBIS) currently in use at BNL [3]. Helium-3 gas would be polarized via metastability exchange optical pumping and introduced into EBIS for ionization and extraction.…”

Section: Introductionmentioning

confidence: 99%

“…Metastability exchange optical pumping (MEOP) allows enhanced polarization of 3 He nuclei in a low pressure gas using a uniform magnetic field and circularly polarized light [4]. An RF discharge in the gas promotes a small fraction of the atoms into the 2 3 S 1 metastable state.…”

Section: Introductionmentioning

confidence: 99%

“…The planned source would produce polarized 3 He near 1 torr, where low field MEOP of 3 He proceeds optimally, before transferring the gas into EBIS, which operates at just 10 −7 torr. After ionization and extraction, EBIS would deliver approximately 10 11 ions for each 20 µsec pulse.…”

Section: Introductionmentioning

confidence: 99%

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Diffusive transfer of polarized 3He gas through depolarizing magnetic gradients

Maxwell

Epstein

Milner

2015

Nuclear Instruments and Methods in Physics Research Section A:

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Transfer of polarized 3 He gas across spatially varying magnetic fields will facilitate a new source of polarized 3 He ions for particle accelerators. In this context, depolarization of atoms as they pass through regions of significant transverse field gradients is a major concern. To understand these depolarization effects, we have built a system consisting of a Helmholtz coil pair and a solenoid, both with central magnetic fields of order 30 gauss. The atoms are polarized via metastability exchange optical pumping in the Helmholtz coil and are in diffusive contact via a glass tube with a second test cell in the solenoid. We have carried out measurements of the spin relaxation during transfer of polarization in 3 He at 1 torr by diffusion. We explore the use of measurements of the loss of polarization taken in one cell to infer the polarization in the other cell.

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Section: Apparatusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Diffusive transfer of polarized 3He gas through depolarizing magnetic gradients

Maxwell

Epstein

Milner

2015

Nuclear Instruments and Methods in Physics Research Section A:

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The NASA Space Radiation Laboratory at Brookhaven National Laboratory: Preparation and delivery of ion beams for space radiation research

Brown

Ahrens

Chiang

et al. 2010

Nuclear Instruments and Methods in Physics Research Section A:

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Electron Beam Ion Source Pre-Injector Diagnostics

Wilinski¹,

Alessi²,

Beebe³

et al. 2006

AIP Conference Proceedings

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Abstract.A new ion pre-injector line is currently under design at Brookhaven National Laboratory (BNL) for the Relativistic Heavy Ion Collider (RHIC) and the NASA Space Radiation Laboratory (NSRL,). Collectively, this new line is referred to as the EBIS project. This pre-injector is based on an Electron Beam Ion Source (EBIS), a Radio Frequency Quadrupole (R-FQ) accelerator, and a linear accelerator. The new EBIS will be able to produce a wide range of heavy ion species as well as rapidly switching between species. To aid in operation of the pre-injector line, a suite of diagnostics is currently proposed which includes faraday cups, current transformers, profile monitors, and a pepperpot emittance measurement device.

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Progress on Test EBIS and the Design of an EBIS-Based RHIC Preinjector

Cited by 4 publications

References 6 publications

Diffusive transfer of polarized 3He gas through depolarizing magnetic gradients

Diffusive transfer of polarized 3He gas through depolarizing magnetic gradients

The NASA Space Radiation Laboratory at Brookhaven National Laboratory: Preparation and delivery of ion beams for space radiation research

Electron Beam Ion Source Pre-Injector Diagnostics

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