Presented are the general description of the SSC linac and the plans for commissioning. Sections of the linac are installed, tested. and beam commissioned in a serial approach. A specialized set of diagnostics is used to characterize the beam through each section. In addition to the standard diagnostic set. plans call for the use of a bunch shape monitor and x-ray spectrometer. Streak camera and digital imaging diagnostics will be developed. The commissioning plan is folded into the general linac project schedule to show the relation between delivery, staging, installation, conditioning, and actual commissioning with beam. These plans form the basis for coordination between the various organizations responsible for different elements of the linac including the technical components, infrastructure, and temporary staging and operation facilities.

The RFQ-DTL matching section has four variable field quadrupole magnets in a FODO lattice to match the 2.5-MeV, 27-mA, H/sup -/ beam from the RFQ to the acceptance space of the DTL, as well as to provide beam steering. In addition, there are two rf buncher cavities to provide longitudinal phase space tuning. An ensemble of beam diagnostics including input and output beam current toroids and beam position monitors, a wire scanner for beam profile measurements, a slit and collector device for beam emittance measurements, and a Faraday cup is used to quantify the matching section performance. The finalized design of the major components of the RFQ-DTL matching section is presented as well as the status of its construction.< >

The integration and performance of subsystems on the Superconducting Super Collider Laboratory (SSCL) 428 MHz, 0.1% duty factor radiofrequency quadrupole accelerator is reported. Results of low- and high-power rf measurements on the RFQ cavity are compared to design specifications. Operation of the integrated RFQ vacuum, temperature and supervisory control systems are described

The Superconducting Super Collider (SSC) LINAC Injector consists of an ion source, low energy beam transport (LEBT) and radio frequency quadrupole accelerator (RFQ). The LINAC Injector is required to provide 25 mA of H/sup /eam (pulse width of 9.6-48 /spl mu/s at 10 Hz repetition rate) at 2.5 MeV with transverse normalized rms emittance (/spl epsisub t-n-rms/) of less than 0.2 /spl pi/ mm-mrad and longitudinal normalized rms emittance (/spl epsisub 1/) of less than 0.82*10/sup -6/ eV-s. An RF-driven volume source was chosen for the initial commissioning of the SSC LINAC Injector. The RF volume source generates beams with /spl epsisub t-n-rms/ as low as 0.06 /spl pi/ mm-mrad while meeting all other SSC ion source operating requirements (30 mA at 35 keV). The highly converging input beam required by the SSC RFQ is provided by a dual einzel lens. The initial experimental results from commissioning of the SSC LINAC injector and experimental results pertinent to the performance of the SSC ion source and LEBT are discussed.< >

The Superconducting Super Collider Accelerating Complex consists of a cascade of accelerators and each one of them accelerates the beam to some energy and then transfers it to the next stage. The design luminosity of 10/sup 33/Cm/sup -2/s/sup -1/ is obtained by the high efficiency of all stages and the ability to accelerate a beam with as minimum emittance growth as possible. For this purpose the linac pulse length is specified as 9 /spl mu/s in order to minimize the number of target crossings and so to minimize the emittance growth during charge exchange injection into the LEB booster. However, the transient caused by switching on the beam makes up a significant part of the pulse length and can influence the characteristics of the beam. In this paper we present the results of the transient study of the coupled cavity linac and discuss the model that predicts the parametric resonance between the beam and the field distortion set up during the transient. >