Ags Polarized H Source

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The Ags Polarized H Source

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Author :
language : en
Publisher:
Release Date : 1985

The Ags Polarized H 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 1985 with categories.

Polarized H Sources For The Ags Present And Future

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Author :
language : en
Publisher:
Release Date : 1986

Polarized H Sources For The Ags Present And Future written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.

The AGS polarized H− source presently produces 30 to 40 .mu. A of vector H− in 500 .mu.s pulses, with a polarization of 70-75%. The source operates reliably and has been used for polarized physics runs the past two years. There is now a development program in progress which has as its goal an operational vector H− source producing milliamperes of current for the AGS.

Ags Polarized H Source

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Author :
language : en
Publisher:
Release Date : 1985

Ags Polarized H 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 1985 with categories.

The AGS polarized H− source is now operational. During a month-long experimental physics run in July 1984, pulses equivalent to 15 .mu. A x 300 .mu.s (approx. 3 x 101° protons) were injected into the RFQ preaccelerator. Beam polarization, measured at 200 MeV, was approx. 75%. After the run, a program to increase the H− yield of the source was begun and significant progress has been made. The H− current is now frequently 20 to 30 .mu. A.A description of the source and some details of our operating experience are given. We also briefly describe the improvement program.

Status Of The Ags Polarized H Source

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Author :
language : en
Publisher:
Release Date : 1982

Status Of The Ags Polarized H 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 1982 with categories.

Development of a polarized H− source for the AGS polarized proton project, initially begun at Argonne National Laboratory in 1979, has been continuing at Brookhaven National Laboratory since early 1982. A description of the source is given and the status of the project is reviewed.

Polarized H Ion Source Development For The Ags

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Author :
language : en
Publisher:
Release Date : 1981

Polarized H Ion Source Development For The Ags written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with categories.

The polarized H− ion source that Argonne National Laboratory and Yale University are building for the AGS polarized beam facility is based on the crossed-beam concept in which a polarized atomic-hydrogen beam, H°, is ionized to H− by a fast neutral cesium beam, Cs°. We describe our studies which will aid in achieving a high intensity polarized H− beam. In particular, we describe time-of-flight studies on the atomic beam and the effect of dissociation nozzle cooling on the velocity distribution. The cesium gun design is described, and a brief discussion of the H°-Cs° interaction region is given.

Status Of The Ags Polarized Negative Ion Source

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Author :
language : en
Publisher:
Release Date : 1983

Status Of The Ags 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 1983 with categories.

Development of an intense polarized H− source for the AGS continues at Brookhaven National Laboratory. Initial tests with about one milliampere, 40 keV pulsed neutral cesium beam, colliding with more than two milliampere polarized hydrogen atoms, produced about one-half microampere polarized negative ions, extracted at 20 keV. A new pulsed cesium source with an anticipated output of 5 to 15 mA and an improved neutralizer are under construction.

Polarized H Sources For The Ags Present And Future

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Author :
language : en
Publisher:
Release Date : 1985

Polarized H Sources For The Ags Present And Future written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.

Polarized Negative Hydrogen Source For The Ags

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Author :
language : en
Publisher:
Release Date : 1980

Polarized Negative Hydrogen Source For The Ags written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.

A polarized hydrogen ion source which uses the reaction Cs+H.-->. Cs+H− is described. The source is intended for a high energy polarized beam facility at the Brookhaven AGS. (GHT).

Polarized H Source Development At Bnl

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Author :
language : en
Publisher:
Release Date : 1986

Polarized H Source 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 1986 with categories.

The AGS polarized H− source (PONI-1) now produces currents of 25-40 .mu. A, and has operated reliably during polarized physics runs. A new polarized source, having as its goal mA's of H-vector, is now under development. An atomic hydrogen beam has been cooled to about 20 K with a forward flux of approx. 1019 atoms/s/sr. A superconducting solenoid having a calculated acceptance angle of 0.1 sr for the cold H° beam, is now being built. An ionizer for the resulting polarized H° beam based on resonant charge exchange of H° with D−, is being tested. 500 .mu. A of H− have been produced by ionizing an unpolarized H° beam using this ionizer.

Ags Polarized Proton Project

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Author :
language : en
Publisher:
Release Date : 1983

Ags Polarized Proton Project written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with categories.

At the end of this year, polarized H− beam will be injected into the AGS, where it will be stripped and subsequently accelerated to 26 GeV/c. 20 keV polarized H− are produced in an ion source working at ground potential by colliding polarized H° with cesium beams and 12 .mu. A of H− have already been achieved in 0.5 ms pulses. 20 keV beam is transported to an RFQ linac where it is accelerated to 750 keV. 750 keV LEBT line matches the RFQ output emittance to the acceptance of the existing 200 MeV linac to reach the desired AGS injection energy. The degree of polarization will depend critically on how well we can cross some 30 depolarizing resonances in the AGS. They can be divided into two types: (1) intrinsic resonances due to natural periodicity of the AGS will be crossed in less than one revolution (approx. 2 .mu.s) by a fast tune jump generated by 12 fast quadrupoles and their modulators, and (2) imperfection resonances due to magnet misalignment will be minimized by generating harmonic correction using 96 existing dipole magnets. In addition, all existing AGS multipoles will be programmed to tailor the tune and chromaticity during the acceleration to further facilitate resonance crossing. In order to insure rapid tune up and commissioning of polarized beams, four independent polarimeters will be used to measure polarization.