Beam Stop Design and Construction for the Front End Test Stand at ISIS
| Autor: | Enparantza, Rafael, Ariz, Iratxe, Bermejo, F. Javier, Faircloth, Dan, Letchford, Alan, Romano, Pierpaolo, Sedano, Angel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Scopus-Elsevier |
| DOI: | 10.18429/jacow-ipac2010-mope049 |
| Popis: | A Front End Test Stand is being built at the Rutherford Appleton Laboratory in the UK to demonstrate a chopped H− beam of sufficiently high beam quality for future high-power proton accelerators (HPPA). The test stand consists on a negative Hydrogen ion source, a solenoid LEBT, a 324 MHz four vane RFQ, a MEBT composed of rebunching cavities and choppers and a set of diagnostics ending with a beam stop. The beam stop, which has to accept a 3 MeV, 60 mA, 2 ms, 50 Hz (10% duty factor) H− beam, consists of a coaxial double cone configuration where the inner cone’s inner surface is hit by the beam and the inter-cone gap is cooled by high-speed water. The cones are situated inside a water tank and mounted at one end only to allow thermal expansion. In order to minimize both prompt and induced radiation pure aluminium is used, but the poor mechanical properties of pure aluminium are overcome by employing a metal spinning process that increases the yield strength to several times the original value of the non-deformed material. CFD and FEM codes have been used to avoid high temperature gradients, to minimize thermal stresses, and to minimize fatigue caused by the pulsed beam. Proceedings of the 1st International Particle Accelerator Conference, IPAC2010, Kyoto, Japan |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|