The basic design for the SSC started at Snowmass in the sumner of 1982. The premise is that a superferric SSC has the potential to be simple, reliable, inexpensive and provide future flexibility. A concentrated effort began in March of 1984 when the Texas Accelerator Center was formed.The TexasAccelerator Center is a group of about 50 people divided into three areas of research, a calculations group working on beam dynamics, an R and D group working on superconducting magnets, and an R and D group working on new accelerator ideas including a proton linac and a plasma-laser accelerator. This paper will emphasize the work on the superferric magnet R and D. Machine ParametersWe propose an injector system with a 3 GeV linac, a 3 to 100 GeV booster, and a 100 GeV to 2 Tev high energy booster. The main ring would cperate fran 2 TeV to 20 Tev. We are pursuing R and D for an if linac capable of 30 ma of beam with an emittance of lrmn.mr and high acceleration gradiant. The elements of this accelerator would be an Hf ion source, an RFQ, a 440mHz drift tube linac, and an undefined cavity structure.The first booster would have a 250 meter radius with small (6 "xll" ) 1.5 Tesla conventional magnets.This very small magnet with a 1'' aperture is allowed because of the small beam emittance. The small beam emittance is possible because the limit on beam emittance is normally at the injection of the linac into the first circular machi2ne3 This space charge blow up is proportional to y y and explains the reason for the 3 GeV linac. The booster would operate at 5 Hz and thus allow construction of a conventional beam tube for vaccum. Tis accelerator would be capable of acplerating 3x10 particles per bunch at 50 mHz or 3x10 per second.The high energy booster would use a unit of the superferric mgnet fran the big ring, which will be discussed below. This ring would have a radius of 2.5 kilcmeters, and would be an oval accelerator with straight sections on the two sides that could be used for machine functions or for interaction regions. The accelerator would be capable of a 1 minute cycle time similar to the Tevatron at Fermilab, and thus be able to load the large SSC ring in 10 minutes. It would be constructed with a 2-in-1 magnet so that beam could be simultaneously injected in each direction into the big ring.This would also permit colliding beam experiments in this ring at 2 Tev 3gn 22 _ The luminosity would be approximately 10 cm s . There would also be extracted beams for tests or fixed target physics.The main ring of the SSC would be rade up of 1330-115 meter units, plus straight sections for machine cperation and interaction regions, and have a total circumference of 162 kilcmeters. Each of the 115 meter units would be made up internally with 3-35 meter dipoles, 1-4.7 meter quadrApole, and 4.3 meters for a spool piece containing correction elements, position tronitors, expansion joints, and heat exchangers. The 35 m unit dipoles, quadrpoles, and spool pieces would be assembled individually at various industries throughout the c...

Ammthod has been developed to analyze the beam dymamiceof tha radio frequancy quadruple accelerating structure. Cslculatioms show that this structurecen qccept a dc baemat low velocity. bunch it with high capture qfficiency,and qccelerateit to q velocity sultcbla for Injectlom into q dsift tube linac.

The NBS-LASL racetrack microtron (RTM) is a joint research project of the National Bureau of Standards and the Los Alamos Scientific Laboratory. The project goals are to determine the feasibility of, and develop the necessary technology for building high-energy, high-current, continuous-beam (cw) electron accelerators using beam recirculation and room-temperature rf accelerating structures. To achieve these goals, a demonstration accelerator will be designed, constructed, and tested. Parameters of the demonstration RTM are: injection energy -5 MeV; energy gain per pass -12 MeV; number of passes -15; final beam energy -185 MeV; maximum current 550 pA. One 450 kW cw klystron operating at 2380 MHz will supply rf power to both the injector linac and the main accelerating section of the RTM. The disk and washer standing wave rf structure being developed at LASL will be used. SUPERFISH calculations indicate that an effective shunt impedance (ZT2) of about 100 MQ/m can be obtained. Thus, rf power dissipation of 25 kW/m results in an energy gain of more than 1.5 MeV/m. Accelerators of this type should be attractive for many applications. At beam energies above about 50 MeV, an RTM should be considerably cheaper to build and operate than a conventional pulsed rf linac of the same maximum energy and time-average beam power. In addition, the RTM provides superior beam quality and a continuous beam which is essential for nuclear physics experiments requiring time-coincidence measurements between emitted particles.

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