Measurements of ultimate accelerating gradients in the SLAC disk-loaded structure

Conference · Tue Oct 01 04:00:00 EDT 1985 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:6120653

Wang, J W; Loew, G A

This paper is a status report on an on-going program at SLAC to study accelerator structures under high-gradient electric field conditions. The study is a part of a much broader program dealing with future linear colliders. The accelerating gradient that might be achievable in such machines is a crucial parameter because once the beam energy is selected, the gradient determines the length of the linac and directly or indirectly affects the choice of many other parameters such as frequency, energy consumption, size and number of RF sources, alignment, wakefield control, etc. The experiments done so far at SLAC deal with a conventional disk-loaded accelerator section of the constant-gradient type running at 2856 MHz. The original objective was to reach an accelerating gradient of at least 100 MV/m. The accelerating gradient at which the SLAC disk-loaded waveguide operates routinely is about 9 MV/m (with 36 MW klystrons feeding four 3 m sections without SLED) and about 12 MV/m with SLED I (2.5 sec pulse). With 50 MW tubes and SLED II (5 sec pulse) the gradient is presently being increased to over 20 MV/m. To reach 100 MV/m in a conventional 3 m constantgradient section without SLED, one would need a klystron with a peak power output of 900 MW. Since such a tube is not available, we decided to use a short standing-wave section in which the resonant fields can build up. The design criteria for this section, the fabrication, matching and tuning, the experimental set-up and the results are described.

• Research Organization: Stanford Linear Accelerator Center, Stanford University, Stanford, California
• OSTI ID: 6120653
• Report Number(s): CONF-850504-
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: NS-32:5
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
ACCELERATION
ACCELERATORS
BEAM DYNAMICS
BEAM TRANSPORT
COMPUTER CALCULATIONS
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 01-100
KLYSTRONS
LINEAR ACCELERATORS
MAGNETIC FIELDS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
NATIONAL ORGANIZATIONS
POWER RANGE 10-100 MW
RF SYSTEMS
STANFORD LINEAR ACCELERATOR CENTER
US DOE
US ERDA
US ORGANIZATIONS