Design, construction and performance of all niobium superconducting radio frequency electron gun

T. Rao; I. Ben-Zvi; A. Burrill; H. Hahn; D. Kayran; Y. Zhao; P. Kneisel; H. Bluem; M. Cole; A. Favale; E. Peterson; T. Schultheiss; J. Rathke

doi:10.1016/j.nima.2006.02.172

Design, construction and performance of all niobium superconducting radio frequency electron gun

T. Rao
, I. Ben-Zvi
, A. Burrill
, H. Hahn
, D. Kayran
, Y. Zhao
, P. Kneisel
, H. Bluem
, M. Cole
, A. Favale
, E. Peterson
, T. Schultheiss
, J. Rathke

Physics and Astronomy

Brookhaven National Laboratory
Thomas Jefferson National Accelerator Facility
Advanced Energy Systems Inc.

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

4 Scopus citations

Abstract

Over the past several years Advanced Energy Systems, BNL, and JLab have been collaborating on the development and testing of a fully superconducting, all-niobium RF gun driven by a laser. This paper will review the simulations, design of the gun, and present results of its performance under various operating conditions. Cavity Q of 10⁸ at 4 K and QE of 10^-5 at 248 nm, charge up to 0.3 nC/RF cycle and 5 nC in 12 ns have been obtained. Even at these large charges, no effects of cavity quenching have been observed. Measurements of the cavity quality factor at various operating temperatures and quantum efficiency of Nb at superconducting temperature at various cavity field gradients, laser wavelengths and laser powers are presented. Effects of laser cleaning of the cathode and future tests using this gun will also be discussed.

Original language	English
Pages (from-to)	22-33
Number of pages	12
Journal	Nuclear Inst. and Methods in Physics Research, A
Volume	562
Issue number	1
DOIs	https://doi.org/10.1016/j.nima.2006.02.172
State	Published - Jun 15 2006

Keywords

Electron gun
Photoemission
RF gun
Superconducting niobium

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Rao, T., Ben-Zvi, I., Burrill, A., Hahn, H., Kayran, D., Zhao, Y., Kneisel, P., Bluem, H., Cole, M., Favale, A., Peterson, E., Schultheiss, T., & Rathke, J. (2006). Design, construction and performance of all niobium superconducting radio frequency electron gun. Nuclear Inst. and Methods in Physics Research, A, 562(1), 22-33. https://doi.org/10.1016/j.nima.2006.02.172

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title = "Design, construction and performance of all niobium superconducting radio frequency electron gun",

abstract = "Over the past several years Advanced Energy Systems, BNL, and JLab have been collaborating on the development and testing of a fully superconducting, all-niobium RF gun driven by a laser. This paper will review the simulations, design of the gun, and present results of its performance under various operating conditions. Cavity Q of 108 at 4 K and QE of 10-5 at 248 nm, charge up to 0.3 nC/RF cycle and 5 nC in 12 ns have been obtained. Even at these large charges, no effects of cavity quenching have been observed. Measurements of the cavity quality factor at various operating temperatures and quantum efficiency of Nb at superconducting temperature at various cavity field gradients, laser wavelengths and laser powers are presented. Effects of laser cleaning of the cathode and future tests using this gun will also be discussed.",

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author = "T. Rao and I. Ben-Zvi and A. Burrill and H. Hahn and D. Kayran and Y. Zhao and P. Kneisel and H. Bluem and M. Cole and A. Favale and E. Peterson and T. Schultheiss and J. Rathke",

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AU - Rao, T.

AU - Ben-Zvi, I.

AU - Burrill, A.

AU - Hahn, H.

AU - Kayran, D.

AU - Zhao, Y.

AU - Kneisel, P.

AU - Bluem, H.

AU - Cole, M.

AU - Favale, A.

AU - Peterson, E.

AU - Schultheiss, T.

AU - Rathke, J.

PY - 2006/6/15

Y1 - 2006/6/15

N2 - Over the past several years Advanced Energy Systems, BNL, and JLab have been collaborating on the development and testing of a fully superconducting, all-niobium RF gun driven by a laser. This paper will review the simulations, design of the gun, and present results of its performance under various operating conditions. Cavity Q of 108 at 4 K and QE of 10-5 at 248 nm, charge up to 0.3 nC/RF cycle and 5 nC in 12 ns have been obtained. Even at these large charges, no effects of cavity quenching have been observed. Measurements of the cavity quality factor at various operating temperatures and quantum efficiency of Nb at superconducting temperature at various cavity field gradients, laser wavelengths and laser powers are presented. Effects of laser cleaning of the cathode and future tests using this gun will also be discussed.

AB - Over the past several years Advanced Energy Systems, BNL, and JLab have been collaborating on the development and testing of a fully superconducting, all-niobium RF gun driven by a laser. This paper will review the simulations, design of the gun, and present results of its performance under various operating conditions. Cavity Q of 108 at 4 K and QE of 10-5 at 248 nm, charge up to 0.3 nC/RF cycle and 5 nC in 12 ns have been obtained. Even at these large charges, no effects of cavity quenching have been observed. Measurements of the cavity quality factor at various operating temperatures and quantum efficiency of Nb at superconducting temperature at various cavity field gradients, laser wavelengths and laser powers are presented. Effects of laser cleaning of the cathode and future tests using this gun will also be discussed.

KW - Electron gun

KW - Photoemission

KW - RF gun

KW - Superconducting niobium

UR - https://www.scopus.com/pages/publications/33646795320

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DO - 10.1016/j.nima.2006.02.172

M3 - Article

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SP - 22

EP - 33

JO - Nuclear Inst. and Methods in Physics Research, A

JF - Nuclear Inst. and Methods in Physics Research, A

IS - 1

ER -

Design, construction and performance of all niobium superconducting radio frequency electron gun

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Keywords

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