Publications (20)
Experimental characterization of photoemission from plasmonic nanogroove arrays
Christopher M. Pierce, Daniel B. Durham, Fabrizio Riminucci +5
Metal photocathodes are an important source of high-brightness electron beams, ubiquitous in the operation of both large-scale accelerators and table-top microscopes. When the surf…
Photocathode Behavior During High Current Running in the Cornell ERL Photoinjector
Luca Cultrera, Jared Maxson, Ivan Bazarov +18
The Cornell University Energy Recovery Linac (ERL) photoinjector has recently demonstrated operation at 20 mA for approximately 8 hours, utilizing a multialkali photocathode deposi…
Experimental Reconstruction of Source 4D Phase Space Without Prior Knowledge of Transfer Matrix
Charles Zhang, Elena Echeverria, Abigail Flint +7
We experimentally demonstrate a method for reconstructing the transverse 4D phase space of an electron beam at the time of emission from downstream diagnostics of the 4D phase spac…
Operation of Cs-Sb-O activated GaAs in a high voltage DC electron gun at high average current
Jai Kwan Bae, Matthew Andorf, Adam Bartnik +4
Negative Electron Affinity (NEA) activated GaAs photocathodes are the most popular option for generating a high current (> 1 mA) spin-polarized electron beam. Despite its popularit…
Ultracold electrons via Near-Threshold Photoemission from Single-Crystal Cu(100)
Siddharth Karkare, Gowri Adhikari, W. Andreas Schroeder +4
Achieving a low mean transverse energy or temperature of electrons emitted from the photocathode-based electron sources is critical to the development of next-generation and compac…
Brightness of nonequilibrium photoemission in metallic photocathodes near threshold
Jai Kwan Bae, Ivan Bazarov, Pietro Musumeci +3
The operation of photoemission electron sources with wavelengths near the photoemission threshold has been shown to dramatically decrease the minimum achievable photocathode emitta…
Direct measurement of sub-10 fs relativistic electron beams with ultralow emittance
Jared Maxson, David Cesar, Giacomo Calmasini +3
Ultralow emittance ( nm, normalized) electron beams with electrons per bunch are obtained by tightly focusing an ultrafast ( 100 fs) laser pulse on the cathode…
ESPPU INPUT: C within the "Linear Collider Vision"
Matthew B. Andorf, Mei Bai, Pushpalatha Bhat +34
The Linear Collider Vision calls for a Linear Collider Facility with a physics reach from a Higgs Factory to the TeV-scale with collisions. One of the technologies under…
Emittance Minimization for Aberration Correction II: Physics-informed Bayesian Optimization of an Electron Microscope
Desheng Ma, Steven E. Zeltmann, Chenyu Zhang +6
Aberration-corrected Scanning Transmission Electron Microscopy (STEM) has become an essential tool in understanding materials at the atomic scale. However, tuning the aberration co…
Building a Start-to-End Model of the CESR Injector Linac
Ryland Goldman, Adam Bartnik, Jared Maxson
The CESR injector linac supplies positrons to the Cornell Electron Storage Ring in six stages: a thermionic cathode, a 150 kV DC gun, a prebuncher, four electron linac sections, a…
Relativistic electron beam acceleration in a zero-slippage terahertz-driven Inverse Free Electron Laser scheme
Emma Curry, Siara Fabbri, Jared Maxson +2
THz radiation promises breakthrough advances in compact advanced accelerators due to the high frequency and GV/m fields achievable, orders of magnitude larger than in conventional…
Emittance Minimization for Aberration Correction I: Aberration correction of an electron microscope without knowing the aberration coefficients
Desheng Ma, Steven E. Zeltmann, Chenyu Zhang +6
Precise alignment of the electron beam is critical for successful application of scanning transmission electron microscopes (STEM) to understanding materials at atomic level. Despi…
Thermal emittance measurements of a cesium potassium antimonide photocathode
Ivan Bazarov, Luca Cultrera, Adam Bartnik +6
Thermal emittance measurements of a CsK2Sb photocathode at several laser wavelengths are presented. The emittance is obtained with a solenoid scan technique using a high voltage dc…
Monochromation of pulsed electron beams with terahertz radiation at a planar mirror
Cecilia Abbamonte, Adam Bartnik, Jared Maxson
Exquisite control of electron beam energy is required for many electron spectroscopy and imaging applications. For both continuous and pulsed beams, the beam energy spread is funda…
C Demonstration Research and Development Plan
Emilio A. Nanni, Martin Breidenbach, Caterina Vernieri +46
C is an opportunity to realize an ee collider for the study of the Higgs boson at GeV, with a well defined upgrade path to 550 GeV while staying on the…
Harnessing Plasmonic Interference for Nanoscale Ultrafast Electron Sources
Alimohammed Kachwala, Mansoure Moeini Rizi, Christopher M Pierce +3
In this paper we demonstrate the use of plasmonic focusing in conjunction with non-linear photoemisison to develop geometrically flat nanoscale electron sources with less than 40 p…
Ultimate bunch length and emittance performance of an MeV ultrafast electron diffraction apparatus with a DC gun and a multi-cavity SRF linac
Adam Bartnik, Colwyn Gulliford, Georg H. Hoffstaetter +1
We present the design of a high repetition rate MeV energy ultrafast electron diffraction instrument based on a DC photoelectron gun and an SRF linac with multiple independently co…
Fundamental Photoemission Brightness Limit from Disorder Induced Heating
Jared Maxson, Ivan Bazarov, Christopher Coleman-Smith +2
We determine the limit of the lowest achievable photoemitted electron temperature, and therefore the maximum achievable electron brightness, due to heating just after emission into…
Demonstration of Low Emittance in the Cornell Energy Recovery Linac Injector Prototype
Colwyn Gulliford, Adam Bartnik, Ivan Bazarov +13
We present a detailed study of the six-dimensional phase space of the electron beam produced by the Cornell Energy Recovery Linac Photoinjector, a high-brightness, high repetition…
Improved lifetime of a high spin polarization superlattice photocathode
Jai Kwan Bae, Alice Galdi, Luca Cultrera +3
Negative Electron Affinity (NEA) activated surfaces are required to extract highly spin polarized electron beams from GaAs-based photocathodes, but they suffer extreme sensitivity…