The Alignment Jacks of the LHC Cryomagnets （大型强子对撞机Cryomagnets对齐千斤顶）.PDF

Proceedings of EPAC 2004, Lucerne, Switzerland THE ALIGNMENT JACKS OF THE LHC CRYOMAGNETS # Jishnu Dwivedi , Abhay Kumar, S.G. Goswami, V.Madhumurthy, H.C. Soni, CAT, Indore, India, Vittorio Parma, CERN, Geneva, Switzerland Abstract by changing the height of the column by moving a ram inside a cylinder. Considering the limited number of The precise alignment of the 1232 dipoles, 474 Short alignment operations in the LHC lifetime, an important Straight Sections (SSS) and some other components of the choice, aimed at reducing the cost of the jacks, was to LHC collider, requires the use of 6800 jacks. The specific provide the vertical adjustment by using a removable requirements and the need for a cost-effective solution for auxiliary jack (not presented in this paper) inserted this large production, justified the development and concentrically within the guide cylinder. The lifting and industrialisation of a dedicated mechanical jack. The jack relieving of the cryomagnet weight is achieved by was developed, and is now being produced by Centre for