The Csu Accelerator and Fel Facility*

The Colorado State University (CSU) Accelerator Facility will include a 6-MeV L-Band electron linear accelerator (linac) with a free-electron laser (FEL) system capable of producing Terahertz (THz) radiation, a laser laboratory, a microwave test stand, and a magnetic test stand. The photocathode drive linac will be used in conjunction with a hybrid undulator capable of producing THz radiation. Details of the systems used in CSU Accelerator Facility are discussed. FACILITY GOALS There is an expanding demand across a wide variety of discipline in academia, laboratories, and industry for particle accelerators [1,2]. The growing demand of trained accelerator experts continues to motivate the expansion of facilities in a university setting dedicated to training engineers and physicists in accelerator technology. Part of the goal of the CSU Accelerator Facility is to provide a place where both accelerator research and training of high-school through post-doctoral students can flourish. The CSU Accelerator Facility will initially focus on generating long-wavelength free-electron lasers, electronbeam components, and peripherals for free-electron lasers and other light sources. It will also serve as a test bed for particle and laser beam research and development. FACILITY OVERVIEW There are four major systems to the CSU Accelerator Facility: an accelerator and FEL system, a laser laboratory, a microwave test stand, and a magnetic test stand. A diagram of the setup of the major accelerator and FEL components is shown in Figure 1. Overviews of the accelerator, undulator, the laser laboratory, the microwave test stand, and the magnetic test stand are given in the following sections. The Accelerator The linac to be used was constructed by the Los Alamos National Laboratory for the University of Twente. The University of Twente has generously donated the entire system for use at CSU and their team will remain in close collaboration with CSU. The accelerator is a five and a half cell copper structure operating at an RF frequency of 1.3 GHz. The accelerator will operate at a 10-Hz repetition rate and a micropulse repetition rate of 81.25 MHz (the 16 subharmonic of 1.3 GHz). Additional specifications are given in Table 1. Table 1: Linear Accelerator Characteristics