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TUAP02 |
Synchrotron Radiation Monitor - Special Topics |
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- T.M. Mitsuhashi
KEK, Ibaraki, Japan
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The beam instrumentation based on optical technique especially using synchrotron radiation (SR) is one of key apparatus in beam instrumentation for accelerators. In my talk, I would like to present some special topics on SR monitors that you cannot find in conventional text. In the first half, I will focus on insight into optical theory useful for SR monitors such as diffraction theory, aberration theory, etc. Some useful optical techniques for SR monitors from optical shop testing such as focusing elements testing, wavefront error measurement, alignment/collimation of optics will also included in the first half of talk. In the second half, I will introduce some application of special topics for SR monitors. The special topics includes wavefront correction by corrective optics, application of astronomical optics such as first order spatial interferometry for transverse beam profile diagnostic, coronagraph for halo measurement. In the last, I will introduce quantum optical technique, intensity interferometry for temporal beam profile measurement. I will also introduce some optics design useful for SR monitors.
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Slides TUAP02 [18.806 MB]
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| TUPG031 |
Optical Synchrotron Radiation Beam Imaging with a Digital Mask |
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- R.B. Fiorito, A.G. Shkvarunets, H.D. Zhang
UMD, College Park, Maryland, USA
- W.J. Corbett, A.S. Fisher, W.Y. Mok, K. Tian
SLAC, Menlo Park, California, USA
- D. Douglas, F.G. Wilson, S. Zhang
JLAB, Newport News, Virginia, USA
- T.M. Mitsuhashi
KEK, Ibaraki, Japan
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Funding: This work is partially supported by the Office of Naval Research and the DOD Joint Technology Office.
We have applied a new imaging/optical masking technique, which employs a digital micro-mirror device (DMD) and optical synchrotron radiation (OSR), to perform high dynamic range (DR) beam imaging at the JLAB Energy Recovery Linac and the SLAC/SPEAR3 Synchrotron Light Source. The OSR from the beam is first focused onto the DMD to produce a primary image; selected areas of this image are spatially filtered by controlling the state of individual micro-mirrors; and finally, the filtered image is refocused onto a CCD camera. At JLAB this technique has been used successfully to view the beam halo with a DR ~ 105. At SPEAR3 the DMD was used to filter out the bright core of the stored beam to study the turn-by-turn dynamics of the 10-3 weaker injected beam. We describe the optical performance, present limitations and our plans to improve the DR of both experimental systems.
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Poster TUPG031 [4.164 MB]
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