Author: Downer, T.
Paper Title Page
MOPWA077 EPICS, MATLAB, GigE CCD Camera Based Beam Imaging System for the IAC-RadiaBeam THz Project 858
 
  • C.F. Eckman, A. Andrews, T. Downer, Y. Kim, C. O'Neill
    IAC, Pocatello, IDAHO, USA
  • P. Buaphad, Y. Kim
    ISU, Pocatello, Idaho, USA
  • Y. Kim
    JLAB, Newport News, Virginia, USA
 
  At the Idaho Accelerator Center (IAC) of Idaho State University, we have been operating an L-band RF linear accelerator running at low energies (5 - 44 MeV) for the IAC-RadiaBeam THz project. We have designed and implemented an image acquisition and analysis system that can be used for real time observation of the electron beam, tuning of THz radiation production, and measurement of the transverse beam emittance. The imaging system contains an Yttrium Aluminium Garnet (YAG) screen on an actuator, a Prosilica GC1290 GigE CCD camera with an adjustable lens, a screen illuminator, an optical alignment structure, and a lead tube for the camera shielding. The real time continuous beam images can be acquired by SampleViewer, while the single shot beam image can be acquired by the Experiential Physics and Industrial Control System (EPICS) and areaDetector. In this paper, we describe components of the imaging system, the real time beam image acquisition with SampleViewer, the single shot beam image acquisition with areaDetector, and a remote controllable beam image acquisition via MATLAB Channel Access (MCA), MATLAB, and EPICS.  
 
THPEA061 EPICS Accelerator Control System for the IAC-RadiaBeam THz Project 3279
 
  • A. Andrews, B.L. Berls, T. Downer, C.F. Eckman, K. Folkman, Y. Kim, C. O'Neill, J. Ralph
    IAC, Pocatello, IDAHO, USA
  • P. Buaphad, Y. Kim
    ISU, Pocatello, Idaho, USA
 
  The Idaho Accelerator Center (IAC) of Idaho State University has been operating a 44 MeV L-band linac for various nuclear physics related applications. However, for the past several years, this research has been done without the aid of a modern computer based control system. To obtain a better reproducibility and stability in operation, the EPICS accelerator control system has been applied to control various components of this linac. This has been done for the purpose of a joint THz research project between IAC and RadiaBeam that was performed in November 2012. This paper describes the development of the EPICS accelerator control system used during this joint THz research experiment.  
 
THPEA062 Magnetic Field Measurements for the IAC-RadiaBeam THz Project 3282
 
  • P. Buaphad, Y. Kim, M. Williams
    ISU, Pocatello, Idaho, USA
  • A. Andrews, T. Downer, C.F. Eckman, Y. Kim, M. Smith
    IAC, Pocatello, IDAHO, USA
 
  At the Idaho Accelerator Center (IAC) of Idaho State University, recently, a new chicane with four dipoles and quadrupole triplet magnets were installed in a 44 MeV linac to perform the IAC-RadiaBeam Terahertz (THz) project. To generate high power THz radiation, a THz radiator with numerous periodic gratings was also installed downstream of the quadrupole triplet. However, the electron beam shape at the radiator has to be horizontally focused strip-like one due to a tiny radiator gap with a width of 1.2 mm, and electron bunch length should be about a few picosecond (ps) to generate high power THz radiation in the radiator. By using the quadrupole triplet and chicane dipoles, we can control the transverse beam profile and bunch length freely. In this paper, we report the measured field maps of the dipole and quadrupole magnets, their effective lengths, and field strength or gradient as a function of the magnet power supply current.