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Eddy Current Effect of the Bnl-Ags Vacuum Chamber on the Optics of the Bnl-Ags Synchrotron.
During the acceleration cycle of the AGS synchrotron, eddy currents are generated within the walls of the vacuum chambers of the AGS main magnets. The vacuum chambers have elliptical cross section, are made of inconel material with a wall thickness of 2 mm and are placed within the gap of the combined-function main magnets of the AGS synchrotron. The generation of the eddy currents in the walls of the vacuum chambers, creates various magnetic multipoles, which affect the optics of the AGS machine. In this report these magnetic multipoles are calculated for various time interval starting at the acceleration cycle, where the magnetic field of the main magnet is {approx}0.1 T, and ending before the beam extraction process, where the magnetic field of the main magnet is almost constant at {approx}1.1 T. The calculations show that the magnetic multipoles generated by the eddy-currents affect the optics of the AGS synchrotron during the acceleration cycle and in particular at low magnetic fields of the main magnet. Their effect is too weak to affect the optics of the AGS machine during beam extraction at the nominal energies.
Date:
March 29, 1999
Creator:
Tsoupas, N.; Ahrens, L.; Brown, K. A.; Glenn, J. W. & Gardner, K.
Object Type:
Article
System:
The UNT Digital Library
An Alternative Lattice for the Spallation Neutron Source Accumulator Ring.
As a key component of the Spallation Neutron Source (SNS) Project, the Accumulator Ring will collect the proton beam from the SNS LINAC at an intensity of 2 x 10{sup 14} per pulse at 60 Hz for a total power of 2 MW, exceeding present performance value of existing facilities. Requirements of minimum beam loss for hands-on maintenance and flexibility for future upgrade are essential for the lattice design. In this paper, we study an alternative lattice emphasizing various injection schemes and flexibility for future upgrade. Working points, sextupole families for chromaticity control, and alternate extraction schemes are also considered.
Date:
March 29, 1999
Creator:
Gardner, C. J.; Lee, Y. Y.; Tsoupas, N. & Wei, J.
Object Type:
Article
System:
The UNT Digital Library
High Intensity Performance of the Brookhaven AGS.
The Brookhaven AGS provides 24 GeV protons for a multi-user program of fixed-target high energy physics experiments, such as the study of extremely rare Kaon decays. Up to 7 x 10{sup 13} protons are slowly extracted over 2.2 seconds each 5.1 seconds. The muon storage ring of the g-2 experiment is supplied with bunches of 7 x 10{sup 12} protons. Since the completion of the a 1.9 GeV Booster synchrotron and installation of a new high-power rf system and transition jump system in the AGS various modes of operation have been explored to overcome space charge limits and beam instabilities at these extreme beam intensities. Experiments have been done using barrier cavities to enable accumulation of debunched beam in the AGS as a potential path to significantly higher intensities. We report on the present understanding of intensity limitations and prospects for overcoming them.
Date:
March 29, 1999
Creator:
Ahrens, L. A.; Alessi, J.; Blaskiewicz, M.; Brennan, J. M.; Brown, K.; Gardner, C. et al.
Object Type:
Article
System:
The UNT Digital Library
Turn-by-Turn Analysis of Proton and Gold Beams at Injection in the AGS Booster.
In this paper we describe the latest version of a program we have used for several years to acquire and analyze turn-by-turn data from pick-up electrodes in the AGS Booster during injection. The program determines several parameters of the injected beam including the tunes and the position and angle of the incoming beam. Examples are given for both proton and gold injection.
Date:
March 29, 1999
Creator:
Gardner, C.; Ahrens, L. & Williams, N.
Object Type:
Article
System:
The UNT Digital Library
Beam-Loss Driven Design Optimization for the Spallation Neutron Source (SNS) Ring.
This paper summarizes three-stage design optimization for the Spallation Neutron Source (SNS) ring: linear machine design (lattice, aperture, injection, magnet field errors and misalignment), beam core manipulation (painting, space charge, instabilities, RF requirements), and beam halo consideration (collimation, envelope variation, e-p issues etc.).
Date:
March 29, 1999
Creator:
Wei, J.; Beebe-Wang, J.; Blaskiewicz, M.; Cameron, P.; Danby, G.; Gardner, C. J. et al.
Object Type:
Article
System:
The UNT Digital Library
Simulation of landscape disturbances and the effect of climatic change. Final report, July 15, 1989--July 14, 1990
The purpose of this research is to understand how changes in climate may affect the structure of landscapes that are subject to periodic disturbances. A general model useful for examining the linkage between climatic change and landscape change has been developed. The model makes use of synoptic climatic data, a geographical information system (GRASS), field data on the location of disturbance patches, simulation code written in the SIMSCRIPT language, and a set of landscape structure analysis programs written specifically for this research project. A simplified version of the model, lacking the climatic driver, has been used to analyze how changes in disturbance regimes (in this case settlement and fire suppression) affect landscape change. Landscape change lagged in its response to changes in the disturbance regime, but the lags differed depending upon the character of the change and the particular measure considered. The model will now be modified for use in a specific setting to analyze the effects of changes in climate on the structure of flood-disturbed patches along the Animas River, Colorado.
Date:
January 29, 1993
Creator:
Baker, W. L.
Object Type:
Report
System:
The UNT Digital Library
Simulation of landscape disturbances and the effect of climatic change
The purpose of this research is to understand how changes in climate may affect the structure of landscapes that are subject to periodic disturbances. A general model useful for examining the linkage between climatic change and landscape change has been developed. The model makes use of synoptic climatic data, a geographical information system (GRASS), field data on the location of disturbance patches, simulation code written in the SIMSCRIPT language, and a set of landscape structure analysis programs written specifically for this research project. A simplified version of the model, lacking the climatic driver, has been used to analyze how changes in disturbance regimes (in this case settlement and fire suppression) affect landscape change. Landscape change lagged in its response to changes in the disturbance regime, but the lags differed depending upon the character of the change and the particular measure considered. The model will now be modified for use in a specific setting to analyze the effects of changes in climate on the structure of flood-disturbed patches along the Animas River, Colorado.
Date:
January 29, 1993
Creator:
Baker, W.L.
Object Type:
Report
System:
The UNT Digital Library
The Perry Daily Journal (Perry, Okla.), Vol. 98, No. 299, Ed. 1 Wednesday, January 29, 1992
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 29, 1992
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 99, No. 144, Ed. 1 Wednesday, July 29, 1992
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 29, 1992
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Clifton Record (Clifton, Tex.), Vol. 97, No. 5, Ed. 1 Wednesday, January 29, 1992
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
January 29, 1992
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Perry Daily Journal (Perry, Okla.), Vol. 98, No. 171, Ed. 1 Thursday, August 29, 1991
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 29, 1991
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 100, No. 67, Ed. 1 Thursday, April 29, 1993
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 29, 1993
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Clifton Record (Clifton, Tex.), Vol. 100, No. 13, Ed. 1 Wednesday, March 29, 1995
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
March 29, 1995
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Perry Daily Journal (Perry, Okla.), Vol. 98, No. 144, Ed. 1 Monday, July 29, 1991
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 29, 1991
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 101, No. 144, Ed. 1 Friday, July 29, 1994
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 29, 1994
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 98, No. 93, Ed. 1 Wednesday, May 29, 1991
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 29, 1991
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 102, No. 92, Ed. 1 Monday, May 29, 1995
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 29, 1995
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 101, No. 170, Ed. 1 Monday, August 29, 1994
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 29, 1994
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 97, No. 198, Ed. 1 Saturday, September 29, 1990
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 29, 1990
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 99, No. 93, Ed. 1 Friday, May 29, 1992
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 29, 1992
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Clifton Record (Clifton, Tex.), Vol. 101, No. 42, Ed. 1 Wednesday, May 29, 1996
Semi-weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
May 29, 1996
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Perry Daily Journal (Perry, Okla.), Vol. 100, No. 119, Ed. 1 Tuesday, June 29, 1993
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 29, 1993
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 103, No. 15, Ed. 1 Thursday, February 29, 1996
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 29, 1996
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 100, No. 93, Ed. 1 Saturday, May 29, 1993
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 29, 1993
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History