A Novel Probe For Determining The Size And Position Of A Relativistic Electron Beam

T. J. Orzechowski; Helmut Koehler; W. Edwards; M. Nelson; B. Marshall

doi:10.1117/12.944901

15 October 1984 A Novel Probe For Determining The Size And Position Of A Relativistic Electron Beam

T. J. Orzechowski, Helmut Koehler, W. Edwards, M. Nelson, B. Marshall

Proceedings Volume 0506, Fiber Optics in Adverse Environments II; (1984) https://doi.org/10.1117/12.944901
Event: 28th Annual Technical Symposium, 1984, San Diego, United States

Abstract

In order to determine the size and position of a relativistic electron beam inside the wiggler magnetic field of a Free Electron Laser (FEL), we have developed a new probe which intercepts the electron beam on a high Z target and monitors the resulting bremsstrahlung radiation. The probe is designed to move along the entire three meters of the wiggler. 1 This FEL is designed to operate in the microwave region (2 - 8 mm) and the interaction region is an oversized waveguide with a cross section 3 cm x 9.8 cm. The axial probe moves inside this waveguide. The probe stops the electron beam on a Tantalum target and the resulting x-rays are scattered in the forward direction. A scintillator behind the beam stop reacts to the x-rays and emits visible light in the region where the x-rays strike. An array of fiber optics behind the scintillator transmits the visible light to a Reticon camera system which images the visible pattern from the scintillator. Processing the optical image is done by digitizing and storing the image and/or recording the image on video tape. Resolution and performance of this probe will be discussed.

Citation Download Citation

T. J. Orzechowski, Helmut Koehler, W. Edwards, M. Nelson, and B. Marshall "A Novel Probe For Determining The Size And Position Of A Relativistic Electron Beam", Proc. SPIE 0506, Fiber Optics in Adverse Environments II, (15 October 1984); https://doi.org/10.1117/12.944901

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