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Digitally Controlled Four Harmonic Buncher for FSU LINAC

Title: Digitally Controlled Four Harmonic Buncher for FSU LINAC.
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Name(s): Moerland, Daniel, author
Physics
Type of Resource: text
Genre: Text
Issuance: serial
Date Issued: 2012
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Florida State University's John D. Fox Superconducting Accelerator Laboratory is operating a Tandem-LINAC system for heavy ion beams at energies of 5-10 MeV/u. Recently, the accelerator has been used as the driver for the radioactive beam facility RESOLUT, which poses new demands on its high-intensity performance and time-resolution. These demands motivated us to optimize the RF bunching system and to switch the bunch frequency from 48.5 to 12.125MHz. We installed a four-harmonic resonant transformer to create 3-4 kV potential oscillations across a pair of wire-mesh grids. This setup is modulating the energy of the beam injected into the tandem accelerator, with the aim to create short bunches of beam particles. A sawtooth-like wave-form is created using the Fourier series method, by combining the basis sinusoidal wave of 12.125MHz and its 3 higher order harmonics, in a manner similar to the systems used at ATLAS [1] and other RF-accelerators. A new aspect of our setup is the use of a digital 1GHz function generator, which allows us to optimize and stabilize the synthesized waveform. The control system was realized using Labview [2] and integrated into the recently updated controls of the accelerator. We characterize the bunching quality achieved and discuss the optimization of the bunching wave-form. The bunching system has been successfully used in a number of LINAC-experiments performed during 2011 and 2012.
Identifier: FSU_migr_uhm-0106 (IID)
Submitted Note: A Thesis submitted to the Department of Physics in partial fulfillment of the requirements for graduation with Honors in the Major.
Degree Awarded: Fall Semester, 2012.
Date of Defense: April 16, 2012.
Subject(s): Physics
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_migr_uhm-0106
Host Institution: FSU
Is Part of Series: Honors Theses.

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Moerland, D. (2012). Digitally Controlled Four Harmonic Buncher for FSU LINAC. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_uhm-0106