Loading...
Please wait, while we are loading the content...
Similar Documents
AN IMAGINARY γ t LATTICE FOR THE FERMILAB PROTON DRIVER ∗
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chou, W. Drozhdin, Alexander Johnstone, Cameron Ohnuma, S. |
| Copyright Year | 2001 |
| Abstract | The Fermilab Proton Driver is a high intensity (3× 10 protons per pulse) rapid cycling (15 Hz) synchrotron. The maximum beam energy is 16 GeV. The beam power is about 1 MW. The main parameters can be found in Table 2.1 and 2.2 of Reference [1]. This machine calls for high beam brightness in both longitudinaland transverse planes. In the longitudinal plane, the Proton Driver must deliver bunches with very short length (about 1 ns r.m.s.) at exit. In the transverse plane, the brightness will reach the space charge limit at injection. In order to minimize emittance dilutions during the cycle and to avoid the negative mass instability that could be caused by the space charge, a transition-free FMC lattice has been chosen [2, 3]. To make short bunches, a bunch rotation in longitudinal phase space is necessary. This requires large momentum acceptance of ±2.5%. To keep space charge tune spread under control, the transverse charge distributionof the injected beam will be made as uniform as possible by the painting technique. As a result, the beam emittance will be enlarged to 60π mm-mrad (normalized, 100%). The dynamic aperture of the lattice is required to be twice this value for the entire momentum spread range. Moreover, to avoid any possible synchro-betatron coupling resonance, the straight sections, in which the rf cavities will be located, are made dispersion free. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://accelconf.web.cern.ch/accelconf/p01/PAPERS/TPPH022.PDF |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
