Abstract
A two-mile electron linear accelerator designed to produce an electron beam of high intensity in the energy range of 10 to 40 Bev for purposes of physics research is now being constructed on a site near the Stanford University campus. Stanford is carrying out this work under a prime contract with the U.S. Atomic Energy commission. The estimated total construction cost of this accelerator is $114 million. The construction schedule calls for completion by July 1st, 1966. A general view of the accelerat or and the experimental area is shown in Pig. 1.
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References and notes
R. B. NEAL, ML Report No. 513, Theory of the Constant Gradi ent L inear El ectron Accelerat-or, May 1958, and M Report No. 259, Comparison of the Constant Gradient and Uniform Accelerator Structures, March 1961, Stanford Linear Accelerator Center, Stanford University, California.
The parameter τ has been called IIin several previous reports, where Iis the r.f. attenuation in nepers per unit length, and Iis the length of the accelerator section, τ is equal to ω t F/2Q, where ω is 2πtimes the operating frequency, tF is the filling time and Qis the loss factor in the r.f. structure. The dependence of t upon filling time tF emphasizes the importance of comparing the e.g. and c.i. structures at the same value of τ for each, for equal t, the two structures will have the same filling time, the same stored energies, and the same ratios of input to output r.f. powers (reference 1).
These phenomena were called to our attention by J.E. LEISS of the U.S. National Bureau of Standards (private communication). Calculations made by Leiss have been confirmed by experimental results at Stanford and elsewhere.
M. G. KELLIHER and R. BEADLE, Nature 187, 1099, 1960.
M.C. CROWLEY-MILLING, T.R. JARVIS, C. W. MILLER, G. SAXON, Nature 191, 483, July 1961.
ML Report No. 581, Linear Electron Accelerator Studies, W. W. Hansen Laboratories of Physics, Stanford University, Stanford, California, February 1959.
The original basis for Ï„ = 0.57 was that this particular value resulted in a no-load energy in the constant-impedance accelerator which is 10% less than the maximum no-load energy which can be obtained (occurring at Ï„ = 1.26). This was felt to be the maximum penalty in energy which one could afford to pay to obtain the advantages of low Ï„. The same qualitative reasoning holds for the con stan t-gradi ent accelerator structure and thus, we have not seen fit to change the value of Tselected earlier.
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dredge, A.L.E., Loew, G.A., Neal, R.B. (1963). Design and fabrication of a two-mile disk-loaded linear electron accelerator. In: Microwaves. Palgrave, London. https://doi.org/10.1007/978-1-349-00447-8_121
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DOI: https://doi.org/10.1007/978-1-349-00447-8_121
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