Production of high brightness electron beams with a 17 GHz RF gun

2002 ◽  
Author(s):  
W.J. Brown ◽  
S.E. Korbly ◽  
K.E. Kreischer ◽  
I. Mastovsky ◽  
R.J. Temkin
Keyword(s):  
Electron Beams ◽  
High Brightness ◽  
Rf Gun

scholarly journals Overview of the Semiconductor Photocathode Research in China

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1376
Author(s):  
Huamu Xie
Keyword(s):  
Free Electron Laser ◽  
Electron Beams ◽  
Spectral Response ◽  
Ultrafast Electron Diffraction ◽  
High Brightness ◽  
X Ray ◽  
Rf Gun ◽  
Long Lifetime ◽  
Diffraction Microscopy ◽  
Electron Diffraction Microscopy

With the growing demand from scientific projects such as the X-ray free electron laser (XFEL), ultrafast electron diffraction/microscopy (UED/UEM) and electron ion collider (EIC), the semiconductor photocathode, which is a key technique for a high brightness electron source, has been widely studied in China. Several fabrication systems have been designed and constructed in different institutes and the vacuum of most systems is in the low 10−8 Pa level to grow a high QE and long lifetime photocathode. The QE, dark lifetime/bunch lifetime, spectral response and QE map of photocathodes with different kinds of materials, such as bialkali (K2CsSb, K2NaSb, etc.), Cs2Te and GaAs, have been investigated. These photocathodes will be used to deliver electron beams in a high voltage DC gun, a normal conducting RF gun, and an SRF gun. The emission physics of the semiconductor photocathode and intrinsic emittance reduction are also studied.

scholarly journals Commissioning Results and Electron Beam Characterization with the S-Band Photoinjector at SINBAD-ARES

Instruments ◽  
2021 ◽  
Vol 5 (3) ◽  
pp. 28
Author(s):  
Eva Panofski ◽  
Ralph Assmann ◽  
Florian Burkart ◽  
Ulrich Dorda ◽  
Luca Genovese ◽  
...  
Keyword(s):  
Electron Beams ◽  
Industrial Applications ◽  
Momentum Spread ◽  
High Brightness ◽  
Measurement Results ◽  
Rf Photoinjector ◽  
Rf Gun ◽  
Beam Parameters ◽  
Laser Accelerators

Over the years, the generation and acceleration of ultra-short, high quality electron beams has attracted more and more interest in accelerator science. Electron bunches with these properties are necessary to operate and test novel diagnostics and advanced high-gradient accelerating schemes, such as plasma accelerators and dielectric laser accelerators. Furthermore, several medical and industrial applications require high-brightness electron beams. The dedicated R&D facility ARES at DESY (Deutsches Elektronen-Synchrotron) will provide such probe beams in the upcoming years. After the setup of the normal-conducting, radio-frequency (RF) photoinjector and linear accelerating structures, ARES successfully started the beam commissioning of the RF gun. This paper gives an overview of the ARES photoinjector setup and summarizes the results of the gun commissioning process. The quality of the first electron beams is characterized in terms of charge, momentum, momentum spread and beam size. Additionally, the dependencies of the beam parameters on RF settings are described. All measurement results of the characterized beams fulfill the requirements for operating the ARES linac with this RF photoinjector.

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
Sign in / Sign up

Export Citation Format

Share Document