摘要 :
A new code, CCLTRACE, has been used to estimate error and tolerance limits for two possible examples of a 1284-MHz, 70--600 MeV CCL for the SSC Linac. By calculating the dynamics of the beam center as well as the beam ellipsoid, C...
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A new code, CCLTRACE, has been used to estimate error and tolerance limits for two possible examples of a 1284-MHz, 70--600 MeV CCL for the SSC Linac. By calculating the dynamics of the beam center as well as the beam ellipsoid, CCLTRACE can efficiently perform error studies using Monte Carlo techniques.
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摘要 :
The control of longitudinal emittance in an ion linear accelerator is important for minimizing both chromatic aberrations and beam halo. The root-mean-square (rms) longitudinal emittance growth can result from either the nonlinear...
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The control of longitudinal emittance in an ion linear accelerator is important for minimizing both chromatic aberrations and beam halo. The root-mean-square (rms) longitudinal emittance growth can result from either the nonlinear rf focusing fields or the nonlinear space-charge fields. We will present conclusions based on numerical beam-dynamics studies for both the radio-frequency quadrupole (RFQ), and the drift-tube linac (DTL). We will discuss the scaling of longitudinal emittance produced during the adiabatic bunching in an RFQ and will show the benefits of ramped DTL accelerating field designs to maintain high longitudinal focusing strength with increasing particle energy. 15 refs., 8 figs.
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摘要 :
The parameters for the proposed SSC linac injector system are obtained from the established requirements of the low-energy booster (LEB). The first element of this injector system is a radio-frequency quadrupole (RFQ) that bunches...
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The parameters for the proposed SSC linac injector system are obtained from the established requirements of the low-energy booster (LEB). The first element of this injector system is a radio-frequency quadrupole (RFQ) that bunches the H/sup /minus// ions and accelerates these ion bunches to 2.5 MeV. With a suitable matching section, this beam is injected into a drift-tube linac (DTL), which takes the ions to 120 MeV. The final element is a coupled-cavity linac (CCL) designed to accelerate the H/sup /minus// ions to 600 MeV for injection into the LEB. The conceptual beam dynamics design for the various elements of this linac injector system are described. 4 refs., 5 figs., 4 tabs. (ERA citation 14:011648)
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