| { | |
| "id": "ANNSFFAG09", | |
| "url": "https://www.bmtdynamics.org/cgi-bin/display.pl?name=ANNSFFAG09", | |
| "title": "Advances in Nonlinear Non-Scaling FFAGs", | |
| "pdfs": [ | |
| { | |
| "url": "https://www.bmtdynamics.org/pub/papers/ANNSFFAG09/ANNSFFAG09.pdf", | |
| "filename": "ANNSFFAG09.pdf", | |
| "size_bytes": null | |
| } | |
| ], | |
| "page_text": "Publications\nReprint Server\nAdvances in Nonlinear Non-Scaling FFAGs\nAbstract\nAccelerators are playing increasingly important roles in basic science, \r\ntechnology, and medicine. Ultra \r\nhigh-intensity and high-energy (GeV) proton drivers are a critical \r\ntechnology for accelerator-driven sub-critical reactors (ADS) and many HEP \r\nprograms (Muon Collider) but remain particularly challenging, encountering duty cycle and space-charge limits in \r\nthe synchrotron and machine size concerns in the weaker-focusing cyclotrons; \r\na 10-20 MW proton driver is not presently considered technically achievable \r\nwith conventional re-circulating accelerators. One, as-yet, unexplored re-circulating accelerator, the Fixed-field \r\nAlternating Gradient or FFAG, is an attractive alternative to the other approaches to a high-power beam source. \r\nIts strong focusing optics can mitigate space charge effects and \r\nachieve higher bunch charges than are possible in a cyclotron, and a recent \r\ninnovation in design has coupled stable tunes with isochronous orbits, \r\nmaking the FFAG capable of fixed-frequency, CW acceleration, as in the \r\nclassical cyclotron but beyond their energy reach, well into the \r\nrelativistic regime. This new concept has been \r\nadvanced in non-scaling nonlinear FFAGs using powerful new methodologies \r\ndeveloped for FFAG accelerator design and simulation. The machine described here has \r\nthe high average current advantage and duty cycle of the cyclotron (without \r\nusing broadband RF frequencies) in combination with the strong focusing, \r\nsmaller losses, and energy variability that are more typical of the \r\nsynchrotron. The current industrial and medical standard is a cyclotron, but \r\na competing CW FFAG could promote a shift in this baseline. This paper reports on these new advances in FFAG accelerator \r\ntechnology and presents advanced modeling tools for fixed-field accelerators \r\nunique to the code COSY INFINITY.\nC. Johnstone, M. Berz, K. Makino, S. Koscielniak, P. Snopok,\nInt. Journal of Modern Physics A\n26\n(2011) 1690-1712\nDownload\nClick on the icon to download the corresponding file.\nDownload Adobe PDF version (1098252 Bytes).\nGo Back\nto the reprint server.\nGo Back\nto the home page.\nThis page is maintained by\nKyoko Makino\n. Please contact her if there are any problems with it." | |
| } |