Promising cathode materials for high brightness electron beams

1984 ◽  
Vol 2 (1) ◽  
pp. 73 ◽  
Author(s):  
Shigeaki Zaima
Keyword(s):  
Cathode Materials ◽  
Electron Beams ◽  
High Brightness

scholarly journals Single-shot reconstruction of core 4D phase space of high-brightness electron beams using metal grids

2018 ◽  
Vol 21 (10) ◽  
Author(s):  
D. Marx ◽  
J. Giner Navarro ◽  
D. Cesar ◽  
J. Maxson ◽  
B. Marchetti ◽  
...  
Keyword(s):  
Phase Space ◽  
Electron Beams ◽  
Single Shot ◽  
High Brightness

scholarly journals Long lifetime of bialkali photocathodes operating in high gradient superconducting radio frequency gun

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
E. Wang ◽  
V. N. Litvinenko ◽  
I. Pinayev ◽  
M. Gaowei ◽  
J. Skaritka ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Electron Beams ◽  
Spot Size ◽  
Laser Spot ◽  
Laser Spot Size ◽  
High Quantum Efficiency ◽  
High Brightness ◽  
High Charge ◽  
Superconducting Radio Frequency ◽  
Long Lifetime

AbstractHigh brightness, high charge electron beams are critical for a number of advanced accelerator applications. The initial emittance of the electron beam, which is determined by the mean transverse energy (MTE) and laser spot size, is one of the most important parameters determining the beam quality. The bialkali photocathodes illuminated by a visible laser have the advantages of high quantum efficiency (QE) and low MTE. Furthermore, Superconducting Radio Frequency (SRF) guns can operate in the continuous wave (CW) mode at high accelerating gradients, e.g. with significant reduction of the laser spot size at the photocathode. Combining the bialkali photocathode with the SRF gun enables generation of high charge, high brightness, and possibly high average current electron beams. However, integrating the high QE semiconductor photocathode into the SRF guns has been challenging. In this article, we report on the development of bialkali photocathodes for successful operation in the SRF gun with months-long lifetime while delivering CW beams with nano-coulomb charge per bunch. This achievement opens a new era for high charge, high brightness CW electron beams.

scholarly journals Focusing of High-Brightness Electron Beams with Active-Plasma Lenses

2018 ◽  
Vol 121 (17) ◽  
Author(s):  
R. Pompili ◽  
M. P. Anania ◽  
M. Bellaveglia ◽  
A. Biagioni ◽  
S. Bini ◽  
...  
Keyword(s):  
Electron Beams ◽  
Active Plasma ◽  
High Brightness

scholarly journals Electron beam control using experimentally measured transport matrices

1994 ◽  
Vol 12 (1) ◽  
pp. 17-21 ◽  
Author(s):  
C.B. McKee ◽  
John M.J. Madey
Keyword(s):  
Spatial Distribution ◽  
Electron Beam ◽  
Electron Accelerator ◽  
Electron Beams ◽  
Transport Systems ◽  
Evoked Responses ◽  
Free Electron Lasers ◽  
High Brightness ◽  
Electron Accelerators

Free electron lasers (FELs) place very stringent requirements on the quality of electron beams. Present techniques for commissioning and operating electron accelerators may not be optimized to produce the high brightness beams needed. Therefore, it is proposed to minimize the beamline errors in electron accelerator transport systems by minimizing the deviations between the experimentally measured and design transport matrices of each beamline section. The transport matrix for each section is measured using evoked responses. In addition, the transverse phase space of the beam is reconstructed by measuring the spatial distribution of the electrons at a number of different betatron phases and applying tomographic techniques developed for medical imaging.

PREFACE: THE PHYSICS AND APPLICATIONS OF HIGH BRIGHTNESS ELECTRON BEAMS

2007 ◽  
Vol 22 (22) ◽  
pp. vii-ix
Author(s):  
LUIGI PALUMBO ◽  
JAMES B. ROSENZWEIG ◽  
LUCA SERAFINI
Keyword(s):  
Electron Beams ◽  
High Brightness

scholarly journals High-Brightness Continuous-Wave Electron Beams from Superconducting Radio-Frequency Photoemission Gun

2020 ◽  
Vol 124 (24) ◽  
Author(s):  
I. Petrushina ◽  
V. N. Litvinenko ◽  
Y. Jing ◽  
J. Ma ◽  
I. Pinayev ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Continuous Wave ◽  
Electron Beams ◽  
High Brightness ◽  
Superconducting Radio Frequency
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