well as that of dark current produced by electron emission from accelerator cavity walls. We have completed the construction of an accelerator structure test arca ...
SLAC-PUB-6148 April 1993
Accelerator
and RF System Development for NLC’
(A)
A. E.Vlieks, R. Callin, H. Deruyter, R. Early, K. S. Fant, Z. D.Farkas,W. R. Fowkes,C. Galloway, H. A. Hoag, R. Koontz, G. A. Loew, T. LLavine, A. Menegat,R. H. Miller, D. Palmer,C. C. Pearson, R. D. Ruth, S. G. Tantawi, P. B. Wilson, J. W. Wang, C. Yoneda StanfordLinearAcceleratorCenter,Stanford,CA 94309USA N. Kroll, UC SanDiego and SLAC. C. Nantista,UCLA Abstract
An experimental station for an X-band Next Linear Collider hasbeenconstructedat SLAC. This stationconsists of a klystron and modulator,a low-loss waveguidesystem for rf power distribution, a SLED II pulse-compression and peak-powermultiplication system,accelerationsectionsand beam-line components(gun, pre-buncher,pre-accelerator, focussingelementsandspectrometer).An extensiveprogram of experiments to evaluate the performance of all componentsis underway.The stationis describedin detail in this paper,andresultsto datearepresented.
concretewith wall thicknesses1.22 m and ceiling thickness 0.61 m. Extensive lead shielding (up to 20 cm thick) is incorporatedin the spectrometerareato keep the expected radiationto a safelevel. II. GUN AND BEAM FOCUSSING
A schematicof the acceleratorbeamline is shown in Figure 1. The electrongun consistsof a planarPiercetriode operatingat a nominal beamvoltage of 80 kV. The designbeamcurrentis 25 mA with a pulsewidth of 10 ns. The rise and fall times of this pulse will be
