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The NLC uses low frequency linacs to accelerate the beams in the injectors before injection into the main linacs. There are total ten low-frequency linacs operating at S- and L-band frequencies in the e- and e+ injector complexes as shown in the following table
| Linac | N Linacs | Freq. (GHz) | Energy (GeV) | Average Current (Amp) |
| e+ capture | 1 | 1.428 | 0.25 | < 4.5 (7.8e10 at 2.8ns) |
| e+ Booster | 1 | 1.428 | 0.25 --> 1.98 | < 0.91 (1.6e10 at 2.8ns) |
| e- Booster | 1 | 2.856 | 0.08 --> 1.98 | < 0.91 (1.6e10 at 2.8ns) |
| e- Drive (for e+ production) | 1 | 2.856 | 0.08 --> 6 | < 0.83 (1.45e10 at 2.8ns) |
| energy comp. & BC1 rf | 2X2 | 1.428 | ~0.1 (at 90 degrees off crest) | < 0.88 (1.5e10 at 2.8ns) |
| pre-linacs | 2 | 2.856 | 1.98 --> 10 | < 0.88 (1.5e10 at 2.8ns) |
| BC2 rf | 2 | 11.424 | ~1 ( at 90 degrees off crest) | < 0.88 (1.5e10 at 2.8ns) |
e+booster: no work beyond the ZDR
e-booster: 4m S-band structures with larger a/lambda; dT beam loading compensation looks OK but need to verify SLED performance; checking need for DDS structure -- looks like purely detuned is OK; new lattice
e-drive: same as e-booster; also looking at using energy spread on target to reduce beam jitter
energy comp & BC1: no work since ZDR; not clear if dT beam loading compensation will work
pre-linacs: see e-booster
BC2: X-band looks desirable in many ways; checked tolerances OK; need to verify beam loading compensation
Created: 07/03/98 by Tor Raubenheimer
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December 14, 2000
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