Electromagnetic and Beam Dynamics Studies for High Gradient Accelerators at Terahertz Frequencies. (July 2020)

• Record Type: Journal Article
• Authors: Marongiu, M.; Chiadroni, E.; Croia, M.; Ferrario, M.; Ficcadenti, L.; Lupi, S.; Martinelli, V.; Mostacci, A.; Pompili, R.; Tofani, S.
• Is Part Of: Journal of physics. Volume 1596(2020)
• Publication Date: 2020-07
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1596/1/012029
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: THz radiation is one of the most appealing portion of the electromagnetic spectrum in terms of multi-disciplinary use in basic science and technology. Beyond the numerous applications, a great interest is its potential for future, compact linear accelerators. Conventional radio-frequency accelerating structures operating at the S and C band can reach gradients up to 30 - 50MV/m, respectively; higher accelerating gradients, of the order of 100MV/m, have been obtained with X-band cavities. THz-based accelerating structures enable operation at even higher gradient, potentially up to the GV/m scale, holding great potential for their application to free-electron lasers and linear colliders, for instance. Here we present electromagnetic and beam dynamics studies about the use of a dielectric loaded waveguide to accelerate electron bunches by mean of a narrow-band multi-cycle THz pulse. The excitation of the accelerating structure by the THz pulse and the bunch acceleration in the excited field are investigated through CST Microwave Studio and GPT simulations.