Showing papers by "J.W. Wang published in 1994"
01 Jan 1994
TL;DR: The current SLAC R&D program to develop room-temperature accelerator structures for the Next Linear Collider (NLC) is described in this article, where the authors present a brief description of the RF test setup, the design and manufacturing details of the structures, and a discussion of test results including field emission, RF processing, dark current spwtrum and RF breakdown.
Abstract: This paper describes the current SLAC R&D program to develop room tem~rature accelerator structures for the Next Linear Collider (NLC). me s~ctures are designd to operate at 11.4 GHz at an accelerating gradient in the range of 50 to 100 MV/m. In the past year a 26 cm constant-impedance traveling-wave section, a 75 cm constant-im~dmce travelingwave section, and a 1.8 m traveling-wave section with detuned deflecting modes have been high-power tested. The paper presents a brief description of the RF test setup, the design and manufacturing details of the structures, and a discussion of test results includlng field emission, RF processing, dark current spwtrum and RF breakdown. Experimental Setup ., Accelerator structures descriti in this paper were dl testi in the Accelerator Structure Test Area (ASTA) facility located
13 citations
01 Jan 1994
TL;DR: In the program of work directed towards the development of an X-Band Next Linear Collider accelerator structure, two different test accelerator sections have been completed, and a third is being fabricated as mentioned in this paper.
Abstract: In the program of work directed towards the development of an X-Band Next Linear Collider accelerator structure, two different test accelerator sections have been completed, and a third is being fabricated. The first is a simple 30-cell constant-impedance section in which no special attention was given to surface finish, pumping, and alignment. The second is an 86-cell section in which the cells were precision diamond-turned by Texas Instruments Inc. The structure has internal water-cooling and vacuum pumping manifolds. Some design details are given for the third section, which is a 206-cell structure with cavities dimensioned to give a Gaussian distribution of dipole mode frequencies. It has conventional machining surface finishes and external water and pumping manifolds. Component design, fabrication, and assembly brazing are described for the first two experimental sections. >
13 citations
01 Jan 1994
Abstract: An experimental station for an X-band Next Linear Collider has been constructed at SLAC. This station consists of a klystron and modulator, a low-loss waveguide system for RF power distribution, a SLED II pulse-compression and peak-power multiplication system, acceleration sections and beam-line components (gun, pre-buncher, pre-accelerator, focussing elements and spectrometer). An extensive program of experiments to evaluate the performance of all components is underway. The station is described in detail in this paper, and results to date are presented.<>
10 citations