Photocathode electron gun

Author: lsic

August undefined, 2024

WebA 704 MHz superconducting RF photoemission electron gun for the R&D ERL project is under commissioning at BNL. Without a cathode insert, the SRF gun achieved its design goal: an accelerating voltage of 2 MV in CW mode. ... accept an alkali antimonide photocathode as the electron source. In this design, the cathode is prepared in a separate ... WebSep 17, 2024 · A C-band photocathode RF gun for a compact electron diffraction facility is developed at Tsinghua University, which is designed to work at the frequency of 5.712GHz. This paper presents the ...

Development of an L-band photocathode RF gun at Tsinghua …

Webverification of the QE at the higher gun gradients. 2.2 Cavity Design An initial RF design of a cavity for use in the superconducting RF photocathode electron gun has also been completed. The design is based on the traditional elliptically shaped cavity in wide use today. The cavity is terminated with a flat endwall on which is located a small WebMar 19, 2012 · The electron bunches come from a photocathode, a rod inside the gun that throws off electrons when hit by photons from a laser. The laser beam enters the gun’s beam-exit port in the opposite direction from the electron beam it stimulates, and is aligned closely parallel to it. earthquakes in the last days bible

Superconducting radio frequency photoinjectors for CW-XFEL

Webelectron gun satisfying such requirements, we are developing an NEA-GaAs photocathode DC-gun. The gun is based on an existing DC-gun of Japan Atomic Energy Agency (JAEA) ERL-FEL and designed to provide a beam with energy of 250 keV and average current of 50 mA. Conditioning of a high voltage power Webphotocathode, an element of a photoelectric cell (q.v.) that emits electrons when struck by light, making possible the flow of electric current through the device. A substance often … WebApr 2, 2012 · The design of the experimental line, using the 1.6 cell photocathode RF gun developed by the BNL/SLAC/UCLA RF gun collaboration is presented. Detailed beam dynamics simulations were performed for the 1.6 cell RF gun injector using a solenoidal emittance compensation technique. An experimental program for testing the 1.6 cell RF … earthquakes in the okanagan

Development of a Photocathode DC Gun at JAEA-ERL - CERN

WebAve. Gun Current (uA) Electron Bunchlength vs Gun Voltage 115kV 100kV 85kV 70kV Measurements at CEBAF/JLab PARMELA Simulation Results Benchmarking PARMELA Simulation Results Against Beam-Based Measurements at CEBAF/Jefferson Lab – work of Ashwini Jayaprakash, JLab Message: Beam quality, including transmission, improves at … WebSome particle accelerators, as used in free electron lasers, for example, contain a pulsed photocathode as an electron gun, i.e., for generating pulsed electron beams with extremely high brightness.The emission is … ctmuhb community dental serviceWebDec 12, 2024 · Time-resolved TEM in conjunction with a photocathode (PC)-type electron source pumped by a pulsed laser has been actively developed to exceed sub-nanosecond time resolution. Here, we provide an overview of the trends in this field and discuss the measurement targets that can be obtained by time-resolved measurements. ... The … earthquakes in the himalayas

"WebAn electron gun (also called electron emitter) is an electrical component in some vacuum tubes that produces a narrow, collimated electron beam that has a precise kinetic energy . The largest use is in cathode-ray tubes … " - Photocathode electron gun

Photocathode electron gun

WebAs a global trusted partner, Photonis' mission is to provide innovative imaging and detection solutions to enable technological breakthroughs for a safer world. Photonis has more … WebJan 3, 2024 · Very high frequency (VHF) photocathode guns have excellent performance and are being increasingly selected as electron sources for high-repetition-rate X-ray free-electron lasers. As a highly loaded quality factor cavity, the VHF gun requires high stability in the amplitude and phase of the cavity field. However, the gun is microwave powered by …

Did you know?

WebOct 12, 2024 · The invention relates to a photocathode microwave electron gun, which comprises a plurality of acceleration cavities communicated mutually along the axis, a … WebThe key component of a photoinjector is a photocathode, which is located inside the cavity of electron gun (usually, a 0.6-fractional cell for optimal distribution of accelerating field). …

WebJun 1, 2003 · Making the electron beam source small is important to obtain a high-resolution image. The laser optics of the gun to obtain fine focus on the photocathode are shown in Fig. 1 a. There is an aspherical focusing lens above the photocathode in vacuum, the position of which can be adjusted to focus on GaAs film through the glass substrate. WebMar 1, 2024 · DOI: 10.1016/j.nima.2024.168251 Corpus ID: 257878311; An ultrahigh-vacuum S-band photocathode radio-frequency electron gun @article{Huang2024AnUS, title={An …

WebNov 15, 2024 · Photocathode guns are the reliable—yet complex—electron sources they need. On Wednesday, Nov. 16, join accelerator physicist Erdong Wang of the EIC … WebFeb 24, 2024 · The combination of the QWR SRF gun with high quantum efficiency, low thermal emittance K–Cs–Sb photocathode has demonstrated delivery of high charge, low …

WebLaser-Electron Accelerator Facility. The design of the LEAF accelerator is innovative: the electron pulse is produced by laser light impinging on a photocathode inside a resonant cavity, radio frequency (RF) gun about 30 cm long. The emitted electrons are accelerated to 9.2 MeV within the length of the gun by ~15 megawatt pulse of RF power from ... earthquakes in the mediterraneanWebFeb 4, 2024 · In this scheme, the electron beam produced in a photocathode radio frequency (rf) gun first expands under its own Coulomb force with which a positive energy chirp is imprinted in the beam ... ctmuk-ccs contactWebFeb 17, 2016 · Based on the success of APEX, a new electron gun system, named APEX2, has been under development to further improve the electron beam brightness. ... high-repetition-rate photocathode electron gun operating in CW mode, and on an array of FELs to which the accelerated beam is distributed, ... ctmuhb websiteWebMar 1, 2024 · DOI: 10.1016/j.nima.2024.168251 Corpus ID: 257878311; An ultrahigh-vacuum S-band photocathode radio-frequency electron gun @article{Huang2024AnUS, title={An ultrahigh-vacuum S-band photocathode radio-frequency electron gun}, author={Peng-Wei Huang and Han Chen and Lianmin Zheng and Huaibi Chen and Yingchao Du and Wenhui … ctmuhb physio self referralWebA dependable and consistent electron source is a crucial requirement for the achievement of high-power free electron lasers (FELs). Over the past two decades, it has been demonstrated that photoinjectors based on SRF technology (SRF guns) are suitable for continuous wave (CW) beam generation. SRF guns possess both the high accelerating field gradients of … earthquakes in the past 100 yearsWebOct 12, 2024 · The invention relates to a photocathode microwave electron gun, which comprises a plurality of acceleration cavities communicated mutually along the axis, a photocathode arranged on the axis of the acceleration cavity, a waveguide tube (102) communicated with the acceleration cavities, a cathode disc (121), and a vacuum cavity … earthquakes in the old testamentWebJan 1, 1989 · Yet another type of electron source is the RF photocathode gun [2], illustrated in figure 1.1. Instead of a thermionic cathode, a photocathode is installed in the 4 RF … ctmuhb vision