The New Bnl Polarized Negative Ion Source

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The New Bnl Polarized Negative Ion Source

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Author :
language : en
Publisher:
Release Date : 1991

The New Bnl Polarized Negative Ion Source written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.

The New Bnl Polarized Negative Ion Source

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Author :
language : en
Publisher:
Release Date : 1991

The New Bnl Polarized Negative Ion Source written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.

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.

Advances In Bnl S Polarized Ion Source Development

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Author :
language : en
Publisher:
Release Date : 1988

Advances In Bnl S Polarized Ion Source Development written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.

The Bnl Polarized H Ion Source Development Program

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Author :
language : en
Publisher:
Release Date : 1992

The Bnl Polarized H Ion Source Development Program written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.

The Bnl Polarized H Sup Minus Ion Source Development Program

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Author :
language : en
Publisher:
Release Date : 1992

The Bnl Polarized H Sup Minus Ion Source Development Program written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.

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 Ion Source Development Program

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Author :
language : en
Publisher:
Release Date : 1992

The Bnl Polarized H Ion Source Development Program written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.

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.

Highly Polarized Ion Sources For Electron Ion Colliders Eic

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Author :
language : en
Publisher:
Release Date : 2010

Highly Polarized Ion Sources For Electron Ion Colliders Eic written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.

The operation of the RHIC facility at BNL and the Electron Ion Colliders (EIC) under development at Jefferson Laboratory and BNL need high brightness ion beams with the highest polarization. Charge exchange injection into a storage ring or synchrotron and Siberian snakes have the potential to handle the needed polarized beam currents, but first the ion sources must create beams with the highest possible polarization to maximize collider productivity, which is proportional to a high power of the polarization. We are developing one universal H-/D- ion source design which will synthesize the most advanced developments in the field of polarized ion sources to provide high current, high brightness, ion beams with greater than 90% polarization, good lifetime, high reliability, and good power efficiency. The new source will be an advanced version of an atomic beam polarized ion source (ABPIS) with resonant charge exchange ionization by negative ions. An integrated ABPIS design will be prepared based on new materials and an optimized magnetic focusing system. Polarized atomic and ion beam formation, extraction, and transport for the new source will be computer simulated.

Advances In Bnl S Polarized Ion Source Development

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Author :
language : en
Publisher:
Release Date : 1988

Advances In Bnl S Polarized Ion Source Development written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.

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.

Negative Ion Source And Beam Development At Bnl

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Author :
language : en
Publisher:
Release Date : 1978

Negative Ion Source And Beam Development At Bnl written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with categories.

Neutral beam injector based on H− ions for Tokamak fusion reactors is gradually evolving from the accumulated research results at BNL. Progress is reported on both Penning and magnetron surface plasma ion sources for direct extraction of negative ions. Schemes for transporting and accelerating of the ion beam are also described. Test results of the gas jets for H− .-->. H° conversion are also included. The next generation of a high energy neutral injector test stand to be completed in the coming months is also presented.

Development And Applications Of Negative Ion Sources

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Author : Vadim Dudnikov
language : en
Publisher: Springer Nature
Release Date : 2023-06-22

Development And Applications Of Negative Ion Sources written by Vadim Dudnikov and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-06-22 with Science categories.

This book describes the development of sources of negative ions and their application in science and industry. It describes the physical foundations and implementation of the key methods of negative ion production and control, such as charge exchange, thermionic emission, plasma volume, secondary emission (sputtering) and surface-plasma sources, as well as the history of their development. Following on from this essential foundational material, the book goes on to explore transport of negative ion beams, and beam-plasma instabilities. Now in its second edition, the book has been substantially expanded and updated to address the many developments since it was first published, most importantly the development and investigation of cesiated surfaces with work function ~1.2-1.3 eV in conditions close to discharges in surface plasma sources. The book also includes a new chapter on development of conversion targets for high-energy neutral beam injectors, covering gas targets, plasma targets and photon targets for efficient conversion of high energy negative ion beams to neutral beams. With exposition accessible at the graduate level, and a comprehensive bibliography, this book will appeal to all students and researchers whose work concerns ion sources and their applications to accelerators, beam physics, storage rings, cyclotrons, and plasma traps.