Study On Tachnology Of Sagittal Focusing And Double-crystal Monochromatic In Synchrotron Radiation

Synchrotron radiation light source, which follows after the source of electric lighting, X-radiation and laser, is a novel one who bring revolutionary force for human civilization, forcing development of science and technology by highly luminance, intensity, collimation and continuous spectrum from infrared ray to X ray, is the strong and advanced instrument of the study and application in physics, material science, chemistry life science, micro-manufacturing and correlative subject, and also has widest application foreground in industry. Crystal monochromator is the key part of the hard X ray beam line in the third synchrotron radiation source. Sagittal focusing double-crystal monochromator has the double function that is sagittal focusing and making beam monochromic, besides accepting wide X rays focus in horizontal direction and geting high intensity flux, the advantages of the monochromator make it used widely in beam line of worldwide advanced synchrotron radiation facility, so sagittal focusing technique is the key one in synchrotron radiation. The study aim of this paper is to manufacture the first sagittal focusing double-crystal monochromator in our country, hold the corresponding important technique and the machining approach of the key part, accumulate the experience of manufacturing, debugging of the monoehromator whose first crystal can endure high heat load and second crystal focus X rays in horizontal direction. The main research work in this thesis is as follows: 1. We briefly introduce the sagittal focusing and monochromic principle of sagittal focusing double-crystal monochromator about the beam between 5?5Kev, and the structure principle ensures the fixing height between the input and output beam. Analyze the structure principle that is used by us, establish the correlative model, get the formula about the departure (yaw, pitches, roll) of Bragg angles on two crystals of sagittal focusing double-crystal, and the relation between the facula focused and the installment precision of structure, which determines the design precision of sagittal focusing double-crystal monochromator, and provides theoretic base for working feasibility of the monochromator.. 2. We microcosmically and macrocosmically analyze the bending principle of the sagittal focusing crystal .We also determine the parameters of the ribs on the back of the crystal, which restrain the anticlastic deformation, on the basis of finite element analysis and present manufacturing ability in our country. Then we theoretically get the movement equations of the right circular flexible hinge and the bending structure basing on flexible hinges, optimize the rotation point of the bending crystal and set up base for key bending technique of sagittal focusing crystal. 3. We theoretically analyze the deformation of the diffracting plane of the even crystal caused by the high heat load. We also determine the parameters of the cooling structure on the basis of the analysis and present manufacturing ability and perform the tracing on the direct water cooling performance of the crystal with SHADOW program. 4. We briefly present the choice of main components and the computer control principle of the sagittal focusing double-crystal monochromator. 5. We theoretically analyze the transmission efficiency of the ideal sagittal focusing double-crystal monochromator. We also get the real transmission efficiency of the practical monochromator with SHADOW.