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in creator/contributor: "Hansborough, L. D."  
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Brazing techniques for side-coupled electron accelerator structures

Description: The collaboration between the Los Alamos National Laboratory and the National Bureau of Standards (NBS), started in 1979, has led to the development of an advanced c-w microtron accelerator design. The four 2380-MHz NBS accelerating structures, containing a total of 184 accelerating cavities, have been fabricated and delivered. New fabrication methods, coupled with refinements of hydrogen-furnace brazing techniques described in this paper, allow efficient production of side-coupled structures. … more
Date: January 1, 1986
Creator: Hansborough, L. D.; Clark, W. L.; DePaula, R. A.; Martinez, F. A.; Roybal, P. L.; Wilkerson, L. C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Linear Accelerator for Radioisotope Production

Description: A 200- to 500-..mu..A source of 70- to 90-MeV protons would be a valuable asset to the nuclear medicine program. A linear accelerator (linac) can achieve this performance, and it can be extended to even higher energies and currents. Variable energy and current options are available. A 70-MeV linac is described, based on recent innovations in linear accelerator technology; it would be 27.3 m long and cost approx. $6 million. By operating the radio-frequency (rf) power system at a level necessary… more
Date: February 1, 1982
Creator: Hansborough, L. D.; Hamm, R. W. & Stovall, J. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fabrication and tuning techniques for side-coupled electron accelerator structures

Description: Beginning in 1979, Los Alamos entered into a collaboration with the National Bureau of Standards (NBS) to develop an advanced cw microtron accelerator. The accelerating structures (one 0.9-m-long, one 2.7-m-long, and two 4.0-m-long) containing a total of 184 accelerating cavities have been fabricated and tuned to the 2380-MHz operating frequency. New methods simplified the fabrication of these structures and eliminated several furnace-brazing steps. These fabrication methods, lathe-mounted tuni… more
Date: January 1, 1986
Creator: Hansborough, L. D.; Clark, W. L.; DePaula, R. A.; Martinez, F. A.; Roybal, P. L.; Wilkerson, L. C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Vacuum design for the disk-and-washer accelerator structure

Description: The disk-and-washer (DAW) accelerator structure is being developed for several applications. Because of its complicated geometry and newness, vacuum calculations for the DAW accelerator structure are not yet formalized. The applicable vacuum equations for this structure are presented and correlations for it have been made with the vacuum data from the Clinton P. Anderson Meson Physics Facility side-coupled accelerator structure. A calculation is presented for the DAW structure proposed for the … more
Date: February 1, 1982
Creator: Ruhe, J. R. & Hansborough, L. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Vacuum properties of sintered SmCo/sub 5/ magnets

Description: There are many desirable applications of powerful, rare-earth permanent magnets made of sintered SmCo/sub 5/ material within vacuum systems. One application is the use of large numbers of SmCo/sub 5/ magnets to provide the undulating magnetic field in a free-electron-laser wiggler structure. Tests were conducted at Los Alamos to determine the suitability of SmCo/sub 5/ magnets in a vacuum environment of approx. 10/sup -6/ torr. The vacuum performances of the wiggler system, with and without the… more
Date: December 1, 1981
Creator: Warren, R. W.; DePaula, R. F. & Hansborough, L. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanical design of RFQ resonator cavities in the 400-MHz frequency range

Description: Many RFQ resonator-cavity design concepts have been proposed in the 400-MHz frequency range. Los Alamos has been evaluating RFQ resonator-cavity designs that provide acceptable combinations of necessary mechanical features, easy tunability and long-term stability. Four RFQ resonator test cavities have been fabricated to test rf joints between the RFQ vanes and the resonator cavity. Two of these joints (the C-seal and the rf clamp-joint) allow vane movement for tuning. These test data, and the d… more
Date: January 1, 1981
Creator: Hansborough, L. D.; Potter, J. M. & Wilson, N. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laboratory performance of the BEAR (Beam Experiment Aboard Rocket) RFQ (radio-frequency quadrupole)

Description: The BEAR (Beam Experiment Aboard Rocket) accelerator will be part of an experiment to demonstrate the operation of an ion accelerator in space and to characterize the exoatmospheric propagation of a neutral particle beam. The RFQ (radio-frequency quadrupole) has been designed to produce a 25-mA H/sup /minus// beam with an emittance of 0.01 cm-mrad (rms normalized) at an energy of 1 MeV. Because of the rigors of spaceflight, the accelerator design has been constrained by factors not normally app… more
Date: January 1, 1988
Creator: O'Shea, P. G.; Schrage, D. L.; Young, L. M.; Zaugg, T. J.; Lynch, M. T.; McKenna, K. F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Accelerator drift-tube braze-joint failures in the PIGMI APF cavity

Description: During the assembly of the Alternating Phase Focusing cavity for the PIGMI Prototype proton accelerator, recurring failures of drift-tube braze joints occurred. In the fabrication technique, a torch braze was used to attach the stems to both the drift-tube body and the stem termination; all materials used were stainless steel. The assemblies were copper plated, using bright-acid-leveling copper plating. Some braze joints, although satisfactorily tension-tested before plating, later failed at a … more
Date: January 1, 1981
Creator: Hansborough, L. D.; Levinson, L. S.; Reiswig, R. D. & Wilkerson, L. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radio-frequency-quadrupole linac in a heavy ion fusion driver system

Description: A new type of linear accelerator, the radio-frequency quadrupole (RFQ) linac, is being developed for the acceleration of low-velocity ions. The RFQ accelerator can be adapted to any high-current applications. A recent experimental test carried out at the Los Alamos Scienific Laboratory (LASL) has demonstrated the outstandig properties of RFQ systems. The test linac accepts a 30-mA proton beam of 100-keV energy and focuses, bunches, and accelerates the beam to an energy to 640 keV. This ia done … more
Date: January 1, 1980
Creator: Hansborough, L. D.; Stokes, R.; Swenson, D. A. & Wangler, T. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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