Compact, High-Power Electron Beam Based Terahertz Sources

Biedron, Sandra; Lewellen, John W.; Milton, S.V.; Gopalsami, N.; Schneider, John F.; Skubal, Laura R.; Li, Yuelin; Virgo, M.; Gallerano, G.P.; Doria, A.; Giovenale, E.; Messina, Giovanni; Spassovsky, I.

doi:10.1109/jproc.2007.898858

Cited by 25 publications

(5 citation statements)

References 31 publications

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“…An RF accelerator generates a train of bunches, and if the correlation among bunches is good, the radiation will be emitted at discrete frequencies which are harmonics of the RF. This is exactly what we have measured experimentally in our compact FED in ENEA [3][4]. A further degree of coherence can be exploited when a proper energyphase correlation is introduced in the electron beam, before entering the interaction region, in order to minimise the negative interferences among the single electrons' emissions.…”

Section: A Free Electron Device As Thz Radiatorsupporting

confidence: 76%

Novel schemes for Compact FELs in the THz region: ENEA Experience and Perspectives

Doria

Gallerano

2018

EPJ Web Conf.

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Section: A Free Electron Device As Thz Radiatorsupporting

confidence: 76%

Novel schemes for Compact FELs in the THz region: ENEA Experience and Perspectives

Doria

Gallerano

2018

EPJ Web Conf.

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“…The simplest solution for bunch compression is to use an electron gun and another separated rf cavity to modulate the energy and compress the bunch. The related scheme was discussed in [19] and [20]. Also, a gun with two separated cells was considered by [21].…”

Section: Design Of Energy Chirping Cell Attached Rf Gunmentioning

confidence: 99%

Ultrashort electron bunch generation by an energy chirping cell attached rf gun

Sakaue

Koshiba

Mizugaki

et al. 2014

Phys. Rev. ST Accel. Beams

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We present a new design for a rf electron gun to be used in ultrashort (∼1 ps) electron bunch generation. Using both simulation and measurement we evaluated the principle of this new type rf gun and were able to confirm an ultrashort bunch generation. During simulation, a bunch length of less than 100 fs(rms) with a 100 pC=bunch charge was confirmed at the optimum operating condition. The principle is to produce a linearly distributed longitudinal phase space by using an attached output cell specially designed for energy chirping. Such phase space distribution can be rotated by the velocity difference in the bunch. We already fabricated an energy chirping cell attached rf gun and successfully observed 0.2 THz coherent synchrotron radiation, which corresponds to less than 500 fs bunch. Such an electron gun can be used as a compact THz light source and a new electron injector with an ultrashort bunch.

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“…For beam-based is meant here a source which makes use of ultrashort (≲1 ps) electron bunches for producing THz in the guise of coherent radiation. Another important kind of beam-based sources are free electron lasers [19][20][21][22][23][24], nevertheless not treated in this work. Laser-based sources are related to the optical rectification (or even to the difference frequency generation) of infrared pump lasers (fs) propagating through non-linear crystals [25].…”

Section: Introductionmentioning

confidence: 99%

Beam-based sub-THz source at the CERN linac electron accelerator for research facility

Curcio

Bergamaschi

Corsini

et al. 2019

Phys. Rev. Accel. Beams

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We report on the radiation studies performed at the CLEAR facility of CERN in the sub-THz range, exploiting picosecond ultrarelativistic electron bunches for the production of coherent radiation. The coherent radiation, produced by different mechanisms (in particular coherent transition radiation), has been fully characterized using different techniques and detectors. The main aim has been that to setup a new beam-based source of radiation in the mm-waves for external users, individuating the performances and the limitations. Moreover the coherent radiation has been used for longitudinal diagnostics, providing reliable bunch length values consistent with other diagnostics. Transverse shaping of the radiation source has been also demonstrated via control of the size and divergence of the electron bunch at the source plane. The mechanism yielding the highest peak-power has been the Cherenkov-Diffraction Radiation, providing ∼0.1 MW. The current performances of the CLEAR THz source seem to be more suitable for highaverage-power than high-peak-power applications. Future plans and strategies will look toward the realization of a high-peak-power source, providing ∼10-100 MW THz pulses.

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Compact, High-Power Electron Beam Based Terahertz Sources

Cited by 25 publications

References 31 publications

Novel schemes for Compact FELs in the THz region: ENEA Experience and Perspectives

Novel schemes for Compact FELs in the THz region: ENEA Experience and Perspectives

Ultrashort electron bunch generation by an energy chirping cell attached rf gun

Beam-based sub-THz source at the CERN linac electron accelerator for research facility

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