Magnetized electron beam for the JLEIC re-circulator cooler ring

Poelker, M.; Adderley, P.; Benesch, J.; Bullard, B. R.; Grames, J.; Hannon, Fay; Hansknecht, J.; Hernandez‐Garcia, C.; Kazimi, R.; Krafft, Geoffrey; Mamun, Md. Abdullah Al; Suleiman, R.; Tiefenback, Michael; Wang, Y.; Wijiethunga, S.; Yoskovitz, J.; Zhang, S.

doi:10.22323/1.324.0012

Cited by 1 publication

(2 citation statements)

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“…Our beam-based emittance studies support this observation, since our photocathodes manufactured with relatively thick Sb layers can provide emittance low enough for many applications. There are other applications, such as XFELs, where the smallest lasing wavelength is limited by the thermal emittance of the electron beam at the cathode [35] and emittances of 0.4 mm mrad=mm are not sufficient.…”

Section: Roughness Emittance Of Photocathode Samplesmentioning

confidence: 99%

“…Charge lifetime is a useful photocathode metric defined as the amount of charge that can be extracted before QE falls to 1=e of the initial value. Some electron cooling proposals require beam current greater than 100 mA [35,36], however for these studies, beam current was limited by the high voltage power supply 5 mA limit. As described in Ref.…”

Section: Photocathode Charge Lifetimementioning

confidence: 99%

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Thermal emittance and lifetime of alkali-antimonide photocathodes grown on GaAs and molybdenum substrates evaluated in a −300 kV dc photogun

Wang

Mamun

Adderley

et al. 2020

Phys. Rev. Accel. Beams

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Cs x K y Sb photocathodes grown on GaAs and molybdenum substrates were evaluated using a −300 kV dc high voltage photogun and diagnostic beam line. Photocathodes grown on GaAs substrates, with varying antimony layer thickness (estimated range from <20 nm to >1 um), yielded similar thermal emittance per rms laser spot size values (∼0.4 mm mrad=mm) but very different operating lifetime. Similar thermal emittance was obtained for a photocathode grown on a molybdenum substrate but with markedly improved lifetime. For this photocathode, no decay in quantum efficiency was measured at 4.5 mA average current and with peak current 0.55 A at the photocathode.

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Section: Roughness Emittance Of Photocathode Samplesmentioning

confidence: 99%

Section: Photocathode Charge Lifetimementioning

confidence: 99%