Cs-K-Te photo cathodes: a promising electron source for free-electron lasers

D. Bisero; B.M. van Oerle; G.J. Ernst; J.W.J. Verschuur; W.J. Witteman

doi:10.1016/S0168-9002(98)00041-2

Cs-K-Te photo cathodes: a promising electron source for free-electron lasers

D. Bisero, B.M. van Oerle, G.J. Ernst, J.W.J. Verschuur^*, W.J. Witteman

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

The characteristics of Cs–K–Te photo-cathodes when used in a photo-cathode linear accelerator will be presented together with a short review of their photo-emissive properties. The cathodes have been illuminated by light pulses obtained by frequency quadrupling the light of a Nd:YLF laser. The emitted electrons have been accelerated in a 1.3 GHz RF linear accelerator operating at an energy of 6 MeV. The quantum efficiency of the Cs–K–Te cathodes at 259 nm decreases exponentially with operation time, but recovers partially during storage in UHV between successive operating sessions. These two effects tend to compensate for long times, so that saturation of the quantum efficiency value at about 2% is reached after 20 h of operation. A Cs–K–Te cathode, degraded by use in the accelerator, can be rejuvenated to about 60% of its initial quantum efficiency by heating it to 120°C for 1 hour.

Original language	English
Pages (from-to)	311-315
Number of pages	5
Journal	Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment
Volume	407
Issue number	1-3
DOIs	https://doi.org/10.1016/S0168-9002(98)00041-2
Publication status	Published - 1998
Event	19th International Free Electron Laser Conference and the 4th FEL Users' Workshop 1997 - Beijing, China Duration: 18 Aug 1997 → 21 Aug 1997 Conference number: 19

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10.1016/S0168-9002(98)00041-2

Cs-K-Te photo cathodes: a promising electron source for Free Electron Lasers
Bisero, D. (Invited speaker), van Oerle, B. M. (Invited speaker), Ernst, G. J. (Invited speaker), Verschuur, J. W. J. (Invited speaker) & Witteman, W. J. (Invited speaker)
18 Aug 1997
Activity: Talk or presentation › Oral presentation

Cite this

@article{f3f9108062fb4fac8263b71ae9a134ff,

title = "Cs-K-Te photo cathodes: a promising electron source for free-electron lasers",

abstract = "The characteristics of Cs–K–Te photo-cathodes when used in a photo-cathode linear accelerator will be presented together with a short review of their photo-emissive properties. The cathodes have been illuminated by light pulses obtained by frequency quadrupling the light of a Nd:YLF laser. The emitted electrons have been accelerated in a 1.3 GHz RF linear accelerator operating at an energy of 6 MeV. The quantum efficiency of the Cs–K–Te cathodes at 259 nm decreases exponentially with operation time, but recovers partially during storage in UHV between successive operating sessions. These two effects tend to compensate for long times, so that saturation of the quantum efficiency value at about 2% is reached after 20 h of operation. A Cs–K–Te cathode, degraded by use in the accelerator, can be rejuvenated to about 60% of its initial quantum efficiency by heating it to 120°C for 1 hour.",

author = "D. Bisero and {van Oerle}, B.M. and G.J. Ernst and J.W.J. Verschuur and W.J. Witteman",

year = "1998",

doi = "10.1016/S0168-9002(98)00041-2",

language = "English",

volume = "407",

pages = "311--315",

journal = "Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment",

issn = "0168-9002",

publisher = "Elsevier B.V.",

number = "1-3",

note = "19th International Free Electron Laser Conference and the 4th FEL Users' Workshop 1997, FEL ; Conference date: 18-08-1997 Through 21-08-1997",

}

Cs-K-Te photo cathodes: a promising electron source for free-electron lasers. / Bisero, D.; van Oerle, B.M.; Ernst, G.J. et al.
In: Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment, Vol. 407, No. 1-3, 1998, p. 311-315.

Research output: Contribution to journal › Article › Academic › peer-review

TY - JOUR

T1 - Cs-K-Te photo cathodes: a promising electron source for free-electron lasers

AU - Bisero, D.

AU - van Oerle, B.M.

AU - Ernst, G.J.

AU - Verschuur, J.W.J.

AU - Witteman, W.J.

N1 - Conference code: 19

PY - 1998

Y1 - 1998

N2 - The characteristics of Cs–K–Te photo-cathodes when used in a photo-cathode linear accelerator will be presented together with a short review of their photo-emissive properties. The cathodes have been illuminated by light pulses obtained by frequency quadrupling the light of a Nd:YLF laser. The emitted electrons have been accelerated in a 1.3 GHz RF linear accelerator operating at an energy of 6 MeV. The quantum efficiency of the Cs–K–Te cathodes at 259 nm decreases exponentially with operation time, but recovers partially during storage in UHV between successive operating sessions. These two effects tend to compensate for long times, so that saturation of the quantum efficiency value at about 2% is reached after 20 h of operation. A Cs–K–Te cathode, degraded by use in the accelerator, can be rejuvenated to about 60% of its initial quantum efficiency by heating it to 120°C for 1 hour.

AB - The characteristics of Cs–K–Te photo-cathodes when used in a photo-cathode linear accelerator will be presented together with a short review of their photo-emissive properties. The cathodes have been illuminated by light pulses obtained by frequency quadrupling the light of a Nd:YLF laser. The emitted electrons have been accelerated in a 1.3 GHz RF linear accelerator operating at an energy of 6 MeV. The quantum efficiency of the Cs–K–Te cathodes at 259 nm decreases exponentially with operation time, but recovers partially during storage in UHV between successive operating sessions. These two effects tend to compensate for long times, so that saturation of the quantum efficiency value at about 2% is reached after 20 h of operation. A Cs–K–Te cathode, degraded by use in the accelerator, can be rejuvenated to about 60% of its initial quantum efficiency by heating it to 120°C for 1 hour.

U2 - 10.1016/S0168-9002(98)00041-2

DO - 10.1016/S0168-9002(98)00041-2

M3 - Article

SN - 0168-9002

VL - 407

SP - 311

EP - 315

JO - Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment

JF - Nuclear instruments & methods in physics research. Section A : Accelerators, spectrometers, detectors and associated equipment

IS - 1-3

T2 - 19th International Free Electron Laser Conference and the 4th FEL Users' Workshop 1997

Y2 - 18 August 1997 through 21 August 1997

ER -

Cs-K-Te photo cathodes: a promising electron source for free-electron lasers

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Cs-K-Te photo cathodes: a promising electron source for Free Electron Lasers

Cite this