The Bnl Polarized H Ion Source Development Program
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The BNL Polarized H− Ion Source Development Program
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| Total Pages | : 6 |
| Release | : 1992 |
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Polarized protons have been available for acceleration in the AGS for the high energy physics program since 1984. The polarized H[sup [minus]] source, PONI-1, has routinely supplied a 0.4 Hz, 400 [mu]sec pulse having a nominal intensity of 40 [mu]A. Polarization is [approximately]80% out of the ion source. After PONI- 1 became operational, a program was initiated to develop a more intense source based on a cold ground state atomic beam source, followed by ionization of the polarized H[degrees] beam by D[sup [minus]] charge exchange. Various phases of this work have been fully reported elsewhere, and only a summary is given here.
The BNL Polarized H[sup [minus] Ion Source Development Program
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| Total Pages | : 6 |
| Release | : 1992 |
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Polarized protons have been available for acceleration in the AGS for the high energy physics program since 1984. The polarized H[sup [minus]] source, PONI-1, has routinely supplied a 0.4 Hz, 400 [mu]sec pulse having a nominal intensity of 40 [mu]A. Polarization is [approximately]80% out of the ion source. After PONI- 1 became operational, a program was initiated to develop a more intense source based on a cold ground state atomic beam source, followed by ionization of the polarized H[degrees] beam by D[sup [minus]] charge exchange. Various phases of this work have been fully reported elsewhere, and only a summary is given here.
Advances in BNL's Polarized Ion Source Development
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| Release | : 1988 |
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Polarized protons have been accelerated in the AGS to 22/yield/ GeV. The polarized source presently used produces 30-40 .mu. A of /rvec char/H− at 75-80% polarization, in 500 .mu.s pulses, 0.5 Hz. This is three orders of magnitude lower in intensity than normal H− operation, and higher intensities are desired. There is a program in the AGS department to develop a higher intensity source. This is a ground state atomic beam source with an atomic beam cooled to 6 K, spin selection and focusing via a superconducting solenoid (shown) or a sextupole system, and an ionizer for /rvec char/H− production based on the charge exchange of /rvec char/H° with D−. Work is in progress on all three components, and will be described in this paper. 6 refs., 7 figs.
High-intensity Polarized H-(proton), Deuteron and 3He++ion Source Development at BNL.
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| Release | : 2008 |
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New techniques for the production of polarized electron, H− (proton), D (D+) and 3H{sup ++} ion beams are discussed. Feasibility studies of these techniques are in progress at BNL. An Optically Pumped Polarized H− Ion Source (OPPIS) delivers beam for polarization studies in RHIC. The polarized deuteron beam will be required for the deuteron Electron Dipole Moment (EDM) experiment, and the 3H{sup ++} ion beam is a part of the experimental program for the future eRHIC (Electron Ion) collider.
Recent Developments in the BNL Intense Polarized H Sup Minus Source Program
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| Total Pages | : 7 |
| Release | : 1989 |
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A program to develop a high intensity polarized H− ion beam for injection into the AGS is under way at this laboratory. The approach we are following is essentially the polarization and ionization of a very cold and intense atomic hydrogen beam. This paper reports on the magnetic focusing of the cold atomic hydrogen beam we have produced. 4 refs., 4 figs.
The New BNL Polarized Negative Ion Source
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| Total Pages | : 10 |
| Release | : 1991 |
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A new ground state source of negative hydrogen ions with polarized nuclei ({rvec H}−) is being developed at BNL. Extensive developmental research has been aimed at improving each element of ({rvec H}−) production: cold H° beam, spin selection and focusing magnets, and ionizer. These elements have recently been integrated into a source. A first test with the accommodator nozzle cooled only to liquid nitrogen temperatures resulted in 5 [mu]A of H−. Tests at liquid helium temperatures are now beginning. 7 refs., 1 fig.
Report on the BNL H− Ion Source Development
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| Release | : 1983 |
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This paper is a report on H− ion source development at BNL over the past ten years, with most emphasis on the selected approach for the design of a steady state operating source. Sources of this kind will be used in neutral beam lines of future fusion devices, for plasma heating and toroidal current drive. In addition to the steady state operation, H− ion sources for this application have to show very high gas and power efficiencies. 16 references, 8 figures.
