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ABSTRACT: Large maintenance dose burdens have necessitated the development of radiation resistant water manifolds for use on DC magnets in the proton storage ring (PSR), at the Los Alamos Neutron Science Center (LANSCE) accelerator. This paper will describe dose measurements and the mechanical design of radiation-resistant water manifolds used in PSR.
Particle Accelerator Conference, 2007. PAC. IEEE; 07/2007
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ABSTRACT: A prototype Beam Position and Phase Monitor (BPPM) beam line device is being designed to go in the LANSCE 805-MHz linear accelerator. The concept is to install two beam line devices in locations where their measurements can be compared with older existing Delta-T loop and wire scanner measurements. The purpose for the new devices is to measure the transverse position, angular trajectory, and central beam phase and energy of the LANSCE H+ and H- beams. The mechanical design of the new devices will combine features from previous LANL designs that were built for the LANSCE Isotope Production Facility, LANSCE Switchyard project, and those done for the SNS linear accelerator. This paper will discuss the mechanical design and fabrication issues encountered during the course of developing the BPPM.
Particle Accelerator Conference, 2007. PAC. IEEE; 07/2007
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ABSTRACT: In order to better understand the two stream e-p instability issue in the LANSCE Proton Storage Ring (PSR), a new diagnostic instrument has been developed to measure the electron cloud formation and trapping in a quadrupole magnet at the LANSCE PSR. The device called the Electron Cloud Detector (ECD) was fabricated and has successfully been installed in the PSR. Along with the Electron Cloud Detector, an additional device was developed to manipulate electrons ejected from the quadrupole and allow additional information to be obtained from ECD measurements. This paper will discuss the mechanical design and fabrication issues encountered during the course of developing both devices.
Particle Accelerator Conference, 2007. PAC. IEEE; 07/2007
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ABSTRACT: Dose rate modeling and post irradiation measurements of the Isotope Production Facility (IPF) beamline, at the Los Alamos Neutron Science Center (LANSCE) accelerator have determined that a radiation shielding shutter is required to protect personnel from shine from irradiated targets for routine beam tunnel entries. This paper will describe radiation dose modeling, shielding calculations, and the fail-safe mechanical shutter design.
Particle Accelerator Conference, 2007. PAC. IEEE; 07/2007
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H.W. Alvestad,
W.C. Barkley,
D.B. Barlow,
D.S. Barr,
G.A. Bennett,
L.J. Bitteker,
E. Bjorklund, M.J. Borden,
M.J. Burns,
G. Carr, [......],
J.B. Sandoval,
S. Schaller,
F.E. Shelley,
R.B. Shurter,
J.R. Sims,
J.L. Stockton,
J. Sturrock,
V.P. Vigil,
T. Zaugg,
M. Gulley
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ABSTRACT: Until 2003, the existing configuration of the Los Alamos Neutron Scattering Center (LANSCE) switchyard did not allow simultaneous delivery of the H<sup>−</sup>beam to Lines D and X. In the late 1990’ s, with increased activities in Areas B and C, which serve the ultracold neutron experiments (UCN) and proton radiography (pRad), respectively, planning began to increase beam availability to all areas by installing a kicker system, dubbed the "Switchyard Kicker." The Switchyard Kicker is a system of two pulsed and two direct current magnets that enables simultaneous, uninterrupted beam delivery to Line D for the Lujan Center and the Weapons Neutron Research (WNR) Facility and, on request, a tailored H<sup>−</sup>beam pulse to Line X for the pRad and UCN research areas. The project received funding in July 2001 for design and implementation. During the 2003 Extended Maintenance Period this upgrade was installed in the Switchyard and commissioned during the Accelerator Turn-On period in the summer of 2003. With the commissioning successful, LANSCE now routinely operates in "Kick" mode, delivering simultaneous beam to Line X and Line D, increasing beam availability to all areas and simplifying production scheduling.
Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the; 06/2005
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K. F. Johnson,
H. W. Alvestad,
W. C. Barkley,
D. B. Barlow,
D. S. Barr,
L. S. Bennett,
L. J. Bitteker,
E. A. Bjorklund,
W. Boedeker, M. J. Borden, [......],
Walter F. Sommer,
M. W. Stettler,
J. L. Stockton,
J. C. Sturrock,
T. L. Tomei,
F. Valdez,
V. P. Vigil,
P. L. Walstrom,
P. M. Wanco,
J. Wilmarth
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ABSTRACT: The recently completed 100-MeV H{sup +} Isotope Production Facility (IPF) at the LANSCE will provide radioisotopes for medical research and diagnosis, for basic research and for commercial use. A change to the LANSCE accelerator facility allowed for the installation of the IPF. Three components make up the LANSCE accelerator: an injector that accelerates the H{sup +} beam to 750-KeV, a drift-tube linac (DTL) that increases the beam energy to 100-MeV, and a side-coupled cavity linac (SCCL) that accelerates the beam to 800-MeV. The transition region, a space between the DTL and the SCCL, was modified to permit the insertion of a kicker magnet (23{sup o} kick angle) for the purpose of extracting a portion of the 100-MeV H{sup +} beam. A new beam line was installed to transport the extracted H{sup +} beam to the radioisotope production target chamber. This paper will describe the commissioning and initial operating experiences of IPF.
12/2003
