A Wide-Band Inductive-Output Amplifier

Haeff, Andrew V.; Nergaard, L.S.

doi:10.1109/jrproc.1940.228986

Cited by 31 publications

(2 citation statements)

References 2 publications

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“…In contrast to the triodes discussed previously, inductive output amplifiers (IOAs), such as klystrons and TWTs, utilize inductive circuits to exchange energy with the electron beam [29]. Electron transit times that are long compared to the period are not problematic because the high-frequency coupler is distinct and separate from the beam emission and collection circuit.…”

Section: Microwave Amplifiersmentioning

confidence: 99%

Cold Cathode Microwave Devices

Murphy

Kodis

2001

Vacuum Microelectronics

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Section: Microwave Amplifiersmentioning

confidence: 99%

Cold Cathode Microwave Devices

Murphy

Kodis

2001

Vacuum Microelectronics

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“…The vacuum devices 1 manipulating electrons in vacuum where electrons have the highest mobility are the most efficient devices of generating ultrashort electron bunches 2 3 4 5 6 7 8 9 10 . For several decades, advanced vacuum devices have been demonstrated 11 12 13 , adopting micro-fabricated circuits along with field emission arrays (FEAs) 14 15 or carbon nanotubes 16 17 18 replacing thermionic cathodes 19 20 21 or tungsten needles 22 . Recently reported nanotips 2 3 4 and photocathodes 16 23 24 equipped with femtosecond lasers have attracted great interest because they are promising technologies for an ultrafast (or ultrahigh frequency) vacuum diode.…”

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confidence: 99%

Violation of the transit-time limit toward generation of ultrashort electron bunches with controlled velocity chirp

Jeon

Shin

Hur

2016

Sci Rep

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Various methods to generate ultrashort electron bunches for the ultrafast science evolved from the simple configuration of two-plate vacuum diodes to advanced technologies such as nanotips or photocathodes excited by femtosecond lasers. In a diode either in vacuum or of solid-state, the transit-time limit originating from finite electron mobility has caused spatiotemporal bunch-collapse in ultrafast regime. Here, we show for the first time that abrupt exclusion of transit-phase is a more fundamental origin of the bunch-collapse than the transit-time limit. We found that by significantly extending the cathode-anode gap distance, thereby violating the transit-time limit, the conventional transit-time-related upper frequency barrier in diodes can be removed. Furthermore, we reveal how to control the velocity chirp of bunches leading to ballistic bunch-compression. Demonstration of 0.707 THz-, 46.4 femtosecond-bunches from a 50 μm-wide diode in three-dimensional particle-in-cell simulations shows a way toward simple and compact sources of ultrafast electron bunches for diverse ultrafast sciences.

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