1. Very High Resolution Optical Transition Radiation Beam Profile Monitor
- Author
-
Tonee Smith, Scott Anderson, D. McCormick, Takashi Naito, Hitoshi Hayano, Josef Frisch, Nobuhiro Terunuma, Bobby McKee, J. Nelson, Keith Jobe, and Marc Ross
- Subjects
Physics ,business.industry ,Resolution (electron density) ,Free-electron laser ,Radiation ,law.invention ,Optics ,Transition radiation ,law ,Cathode ray ,business ,Accelerator Test Facility ,Collider ,Beam (structure) - Abstract
We have constructed and tested a 2 um resolution beam profile monitor based on optical transition radiation (OTR). Theoretical studies of OTR [1] show that extremely high resolution, of the order of the wavelength of the light detected, is possible. Such high‐resolution single pulse profile monitors will be very useful for future free electron laser and linear collider projects. Using the very low emittance 1.3 GeV electron beam at the KEK Accelerator Test Facility (ATF) [2] (1.4nm ex × 15pm ey), we have imaged transition radiation from 5 micron σ beam spots. Our test device consisted of a finely polished target, a thin fused silica window, a 35 mm working distance microscope objective (5x and 10x) and a triggered CCD camera. A wire scanner located near the target is used to verify the profile monitor performance. In this paper we report results of beam tests.
- Published
- 2002
- Full Text
- View/download PDF