ERL2019 - Table of Session: WECOXBS (WG3: Electron sources and injectors)

Paper	Title	Page
WECOXBS01	Photocathode Preparation and Characterization at HZB.
	S. Mistry, A. Jankowiak, T. Kamps, J. Kühn HZB, Berlin, Germany
	Photoinjector driven electron accelerators place stringent requirements on the photocathodes used. This is primarily due to the fact that the properties of the generated electron bunch are crucially defined by the material properties of the photocathode employed. To generate high brightness and high average current a photocathode with high QE and low intrinsic emittance is required. Furthermore, to be of practical use, the material must be robust and exhibit a long lifetime to deliver stable beam. Bi-alkali antimonides are suitable candidates; they exhibit high quantum efficiencies and can be operated close to the photoemission threshold, thus enabling the generation of high current and low emittance electron beams. At HZB bi-alkali antimonides are the choice photocathode materials to drive the BERLinPro energy recovery linac. In this talk we present studies conducted at HZB to develop the optimal growth procedure for Cs-K-Sb and Na-K-Sb photocathodes with respect to QE and lifetime measurements.
	Slides WECOXBS01 [16.588 MB]
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WECOXBS02	High Current Performance of Alkali Antimonide Photocathode in LEReC DC Gun	61
	M. Gaowei, J. Cen, A.V. Fedotov, D. Kayran, D. Lehn, C.J. Liaw, T. Rao, J.E. Tuozzolo, J. Walsh, E. Wang BNL, Upton, New York, USA
	The bi-alkali antimonide photocathode are chosen as the electron source material for the Low Energy RHIC electron Cooling (LEReC) project at RHIC, BNL based on its requirement for high bunch charge and long-time beam operation. This report presents the design and operation of the cathode deposition and transportation systems for the LEReC photocathodes, the cathode performance under the high current operation in the LEReC DC gun, as well as the characterization of the damaged cathodes from the long-time operation.
	Slides WECOXBS02 [2.804 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ERL2019-WECOXBS02
About •	paper received ※ 17 September 2019 paper accepted ※ 06 November 2019 issue date ※ 24 June 2020
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WECOXBS03	Bench Test Results of CW 100 mA Electron RF Gun for Novosibirsk ERL based FEL	65
	V. Volkov, V.S. Arbuzov, E. Kenzhebulatov, E.I. Kolobanov, A.A. Kondakov, E.V. Kozyrev, S.A. Krutikhin, I.V. Kuptsov, G.Y. Kurkin, S.V. Motygin, A.A. Murasev, V.K. Ovchar, V.M. Petrov, A.M. Pilan, V.V. Repkov, M.A. Scheglov, I.K. Sedlyarov, S.S. Serednyakov, O.A. Shevchenko, S.V. Tararyshkin, A.G. Tribendis, N.A. Vinokurov BINP SB RAS, Novosibirsk, Russia E.V. Kozyrev, S.S. Serednyakov, N.A. Vinokurov NSU, Novosibirsk, Russia A.G. Tribendis NSTU, Novosibirsk, Russia N.A. Vinokurov KAERI, Daejon, Republic of Korea N.A. Vinokurov UST, Daejeon City, Republic of Korea N.A. Vinokurov University of Science and Technology of Korea (UST), Daejeon, Republic of Korea
	Continuous wave (CW) 100 mA electron rf gun for injecting the high-quality 300-400 keV electron beam in Novosibirsk Energy Recovery Linac (ERL) and driving Free Electron Laser (FEL) was developed, built, and commissioned at BINP SB RAS. The RF gun consists of normal conducting 90 MHz rf cavity with a gridded thermionic cathode unit. Bench tests of rf gun is confirmed good results in strict accordance with our numerical calculations and showed reliable work, unpretentious for vacuum conditions and stable in long-term operation. The design features of different components of the rf gun are presented. Preparation and commissioning experience is discussed. The latest beam results are reported.
	Slides WECOXBS03 [3.201 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ERL2019-WECOXBS03
About •	paper received ※ 14 September 2019 paper accepted ※ 11 November 2019 issue date ※ 24 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

WECOXBS01

Photocathode Preparation and Characterization at HZB.

S. Mistry, A. Jankowiak, T. Kamps, J. Kühn
HZB, Berlin, Germany

Photoinjector driven electron accelerators place stringent requirements on the photocathodes used. This is primarily due to the fact that the properties of the generated electron bunch are crucially defined by the material properties of the photocathode employed. To generate high brightness and high average current a photocathode with high QE and low intrinsic emittance is required. Furthermore, to be of practical use, the material must be robust and exhibit a long lifetime to deliver stable beam. Bi-alkali antimonides are suitable candidates; they exhibit high quantum efficiencies and can be operated close to the photoemission threshold, thus enabling the generation of high current and low emittance electron beams. At HZB bi-alkali antimonides are the choice photocathode materials to drive the BERLinPro energy recovery linac. In this talk we present studies conducted at HZB to develop the optimal growth procedure for Cs-K-Sb and Na-K-Sb photocathodes with respect to QE and lifetime measurements.

Slides WECOXBS01 [16.588 MB]

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WECOXBS02

High Current Performance of Alkali Antimonide Photocathode in LEReC DC Gun

61

M. Gaowei, J. Cen, A.V. Fedotov, D. Kayran, D. Lehn, C.J. Liaw, T. Rao, J.E. Tuozzolo, J. Walsh, E. Wang
BNL, Upton, New York, USA

The bi-alkali antimonide photocathode are chosen as the electron source material for the Low Energy RHIC electron Cooling (LEReC) project at RHIC, BNL based on its requirement for high bunch charge and long-time beam operation. This report presents the design and operation of the cathode deposition and transportation systems for the LEReC photocathodes, the cathode performance under the high current operation in the LEReC DC gun, as well as the characterization of the damaged cathodes from the long-time operation.

Slides WECOXBS02 [2.804 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ERL2019-WECOXBS02

About •

paper received ※ 17 September 2019 paper accepted ※ 06 November 2019 issue date ※ 24 June 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WECOXBS03

Bench Test Results of CW 100 mA Electron RF Gun for Novosibirsk ERL based FEL

65

V. Volkov, V.S. Arbuzov, E. Kenzhebulatov, E.I. Kolobanov, A.A. Kondakov, E.V. Kozyrev, S.A. Krutikhin, I.V. Kuptsov, G.Y. Kurkin, S.V. Motygin, A.A. Murasev, V.K. Ovchar, V.M. Petrov, A.M. Pilan, V.V. Repkov, M.A. Scheglov, I.K. Sedlyarov, S.S. Serednyakov, O.A. Shevchenko, S.V. Tararyshkin, A.G. Tribendis, N.A. Vinokurov
BINP SB RAS, Novosibirsk, Russia
E.V. Kozyrev, S.S. Serednyakov, N.A. Vinokurov
NSU, Novosibirsk, Russia
A.G. Tribendis
NSTU, Novosibirsk, Russia
N.A. Vinokurov
KAERI, Daejon, Republic of Korea
N.A. Vinokurov
UST, Daejeon City, Republic of Korea
N.A. Vinokurov
University of Science and Technology of Korea (UST), Daejeon, Republic of Korea

Continuous wave (CW) 100 mA electron rf gun for injecting the high-quality 300-400 keV electron beam in Novosibirsk Energy Recovery Linac (ERL) and driving Free Electron Laser (FEL) was developed, built, and commissioned at BINP SB RAS. The RF gun consists of normal conducting 90 MHz rf cavity with a gridded thermionic cathode unit. Bench tests of rf gun is confirmed good results in strict accordance with our numerical calculations and showed reliable work, unpretentious for vacuum conditions and stable in long-term operation. The design features of different components of the rf gun are presented. Preparation and commissioning experience is discussed. The latest beam results are reported.

Slides WECOXBS03 [3.201 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ERL2019-WECOXBS03

About •

paper received ※ 14 September 2019 paper accepted ※ 11 November 2019 issue date ※ 24 June 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)