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in subjects: "Particle Beams"  
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Experimental results on the design for the APS PID global orbit control system.

Description: The Advanced Photon Source third generation synchrotrons light source needs a stabilized particle beam position to produce high brightness and low emittance radiation. Global orbit correction control is introduced and is utilized to satisfy the demanding needs of the accelerator. This paper presents the experimental results for determining an effective and optimal controller to meet the global orbit correction requirements. These requirements include frequency/time domain demands consisting of … more
Date: December 5, 1997
Creator: Chung, Y. & Kirchman, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Space-charge forces of a DC beam in a continuous bend

Description: It has been shown that the net space-charge forces for a dc beam with space-charge potential depression in a bend have the usual inverse energy square dependence to the first order in the beam radius a over the bend radius R. We extend the analysis to the second order in a/R and allow the beam to have a small transverse displacement. The net space-charge forces are no longer cancelled to inverse energy square factor. The non-cancelled part of self-induced magnetic forces are at the second order… more
Date: May 1, 1997
Creator: Chen, Yu-Jiuan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High current magnetized plasma discharges and electron beams for capture and cooling of charged leptons and hadrons

Description: Nowadays most magnetic lenses used to capture and to focus pions and muons utilize azimuthal magnetic fields generated by large axial currents, like horns or lithium rods (or even a Z-pinch at GSI). Capture and focusing angle is proportional to the product of the current and length of the lens. State-of-the-art for these lenses is no more than 750 kA and 70 cm. A meter long, multi-MA, magnetized axial discharges were generated by the early days of fusion. Lenses based of such devices can increa… more
Date: July 1, 1997
Creator: Hershcovitch, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis and measurements of Eddy current effects of a beam tube in a pulsed magnet

Description: The power supply design of the {gamma}{sub f} - jump system in FNAL Main Injector uses a resonant circuit. A critical design parameter is the ac losses of the beam tube in a pulsed quadrupole. This paper gives an analysis to this problem. An equivalent circuit model based on the impedance measurement was established. The measured and calculated losses are in agreement. Another effect of the eddy current is the distortion of the magnetic field inside the beam tube. A Morgan coil was used for fie… more
Date: May 1, 1997
Creator: Fang, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The linear parameters and the decoupling matrix for linearly coupled motion in 6 dimensional phase space

Description: It will be shown that starting from a coordinate system where the 6 phase space coordinates are linearly coupled, one can go to a new coordinate system, where the motion is uncoupled, by means of a linear transformation. The original coupled coordinates and the new uncoupled coordinates are related by a 6 x 6 matrix, R. It will be shown that of the 36 elements of the 6 x 6 decoupling matrix R, only 12 elements are independent. A set of equations is given from which the 12 elements of R can be c… more
Date: July 1, 1997
Creator: Parzen, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Center for beam physics 1996-1997

Description: The Center for Beam Physics (CBP) is a multidisciplinary research and development unit in the Accelerator and Fusion Research Division at the Ernest Orlando Lawrence Berkeley National Laboratory of the University of California. At the heart of the Center`s mission is the fundamental quest for mechanisms of acceleration, radiation, transport, and focusing of energy and information. Special features of the Center`s program include addressing R&D issues needing long development time and providing … more
Date: February 1, 1997
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Emittance in particle and radiation beam techniques

Description: The author discusses the important and diverse role of the phase space area - the emittance - in the advanced techniques involving interaction of particle and radiation beams. For undulator radiation from unbunched beams, the radiation phase space is diluted from the coherent phase space of the single electron radiation. When the undulator radiation is used as a light source, it is important to minimize the dilution by decreasing the beam emittance and matching the phase space distributions of … more
Date: March 1, 1997
Creator: Kim, Kwang-Je
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Constant field gradient planar cavity structure

Description: A cavity structure is described having at least two opposing planar housing members spaced apart to accommodate the passage of a particle beam through the structure between the members. Each of the housing members have a plurality of serially aligned hollows defined therein, and also passages, formed in the members, which interconnect serially adjacent hollows to provide communication between the hollows. The opposing planar housing members are spaced and aligned such that the hollows in one me… more
Date: December 1, 1997
Creator: Kang, Yoon W. & Kustom, R.L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Examination of the CLIC drive beam pipe design for thermal distortion caused by distributed beam line

Description: Beam transport programs are widely used to estimate the distribution of power deposited in accelerator structures by particle beams, either intentionally as for targets or beam dumps or accidentally owing the beam loss incidents. While this is usually adequate for considerations of radiation safety, it does not reveal the expected temperature rise and its effect on structural integrity. To find this, thermal diffusion must be taken into account, requiring another step in the analysis. The metho… more
Date: January 1, 1997
Creator: Johnson, C. & Kloeppel, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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