[en] The energy at which the SLC damping rings are operated was chosen to be 1.21 GeV. At the time that that specification was made, the repetition rate of the SLC was expected to be 180 Hz. It is now anticipated that the repetition rate during the initial year of operation of the SLC will be 120 Hz. The following curves which show the output emittance of the damping rings as a function of input emittance and energy suggest that there is a range of energies over which the rings can be operated without changing the SLC luminosity. It should be noted that in the era of polarized beams, the damping ring energy will be fixed at the design value on account of the spin precession required in the LTR and RTL transport lines. The SLC design output emittance of the damping rings is 3 x 10^-5 radian-meters. Because of space charge disruption and quantum emission downstream of the damping rings, much lower values than the design value may not have a large beneficial effect on the luminosity. 3 figures

[en] It has recently been discovered that the HEAR superconducting dipoles have a periodic pattern in their fields as measured along the axis of the dipole. This effect has more recently been observed in the prototype SSC 5 cm dipole. The wavelength of the periods observed in both dipoles is equal to the transposition pitch length of the Rutherford cable. A plausible explanation for the periodic pattern is the existence of a transport current trapped within the cable. That is, a current which runs through one strand from the solder joint at the one end of the cable to the solder joint at the other end, and which returns back by way of another strand. The average current in the strands, which is the current from the power supply, is unaffected by the presence of currents trapped within the cable. The size of the observed field oscillation suggests that the trapped currents might be as large as 100 amps. There is evidence that the trapped currents are time dependent. This is reasonable since the I-V characteristics of the various resistive elements in the cable are all different so the equilibrium distribution of current in the strands should depend on the excitation level of the magnet. It is the purpose of this note to point out that the time dependence of trapped currents is a powerful mechanism for causing the time decay of ''persistent current'' multipoles

[en] The SLAC Linear Collider Project has two principal goals. The first is to serve as a prototype for a future very high energy linear electron-positron collider. The second is to quickly, at low cost, achieve sufficient luminosity at 100 GeV center-of-mass energy to explore the physics of the Z₀. The first goal is important to the future of electron-positron physics because the rapid increase of synchrotron radiation with energy causes the cost of circular storage ring colliders to whereas the cost of linear colliders increases only in proportion to the center-of-mass energy. The second is important because the existance at SLAC of a linear accelerator which can be converted at low cost to collider operation makes possible a unique opportunity to quickly achieve 100 GeV center-of-mass collisions. At the design luminosity of 6.0 x 10₃₀ many thousands of Z₀ decays should be observed in each day of operation

[en] Linac type QC and QCH quadrupoles are mounted on the accelerator with their power connection side facing the injector. The connections are on the top of the magnet. The correct polarity for magnets is shown. The magnetic centers of all magnets are measured. If the magnetic center is above the geometric center, the distance delta y is positive. If the magnetic center is to the right of the geometric center, the distance delta x is positive

[en] The Stanford Linear Collider is described, and the status of commissioning of the major SLC systems is given, including the electron source and 1.2 GeV linac, storage rings, 50 GeV linac, and positron source. Beam transport between the linac and final focus, and the final focus optical system are described

[en] It has been suggested that the dynamic aperture of the SSC can be increased by a suitable choice of the dipole systematic allowed multipole moments so as to extend the uniform field region of the magnet. In this note the effect of combinations of B₄ and B₆ are considered on the tune shifts. These tune shifts have been calculated using the methods of different authors. The results of these calculations are given

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No abstract available

[en] This report presents progress made at the Stanford Linear Collider (SLC). Design goals of the various components are compared to measurements made on the equipment. 8 figs., 2 tabs

[en] The SSCTRK numerical simulation code has been used to estimate the benefit of increasing the SSC dipole aperture from 4 to 5 cm. The increase in maximum amplitude of stable betatron oscillations depends on the level to which systematic errors have been corrected. Two cases have been studied, a highly corrected ring and a ring with limited corrections. The maximum stable amplitude increase is approximately a factor of the ring with limited systematic corrections. The aperture comparison has been made at 10⁵ revolutions. Magnetic error assumptions are described in detail and a new table of errors suggested for future simulations is given. 8 figs., 6 tabs