A transparent vacuum window for high-intensity pulsed beams

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• 作者：Michael Monteil^a ; ^{Michael.Monteil@cern.ch"" rel=""nofollow} ; Juan Blanco^a ; ^b ; Raymond Veness^a
• 关键词：Vacuum window ; Beryllium ; Particle accelerator ; FEM
• 刊名：Vacuum
• 出版年：2011
• 出版时间：5 June 2011
• 年：2011
• 卷：85
• 期：12
• 页码：1165-1169
• 全文大小：764 K

文摘

The HiRadMat (High-Radiation to Materials) facility [1] will allow testing of accelerator components, in particular those of the Large Hadron Collider (LHC) at CERN, under the impact of high-intensity pulsed beams. To reach this intensity range, the beam will be focused on a focal point where the target to be tested is located. A 60 mm aperture vacuum window will separate the vacuum of the beam line which is kept under high vacuum 10⁻⁸ mbar, from the test area which is at atmospheric pressure. This window has to resist collapse due to beam passage. The high-intensity of the beam means that typical materials used for standard vacuum windows (such as stainless steel, aluminium and titanium alloy) cannot endure the energy deposition induced by the beam passage. Therefore, a vacuum window has been designed to maintain the differential pressure whilst resisting collapse due to the beam impact on the window. In this paper, we will present calculations of the energy transfer from beam to window, the design of the window and associated mechanical calculations.