A STUDY OF CsK2Sb MULTI-ALKALI PHOTOCATHODE BY ULTRAVIOLET PHOTOELECTRON SPECTROSCOPY AT UVSOR
نویسندگان
چکیده
Photocathode is one of the most important components in the next-generation accelerators, especially based on linear accelerators. Photocathode performance depends not only on electronic state in its bulk material but also on the surface condition. CsK2Sb multi-alkali photocathode is a candidate for the high brightness electron source because of its high quantum efficiency by green laser and its high robustness. We have carried out an UPS (UV Photoelectron Spectroscopy) experiment at UVSOR facility, synchrotron radiation light source in Aichi Japan. We have compared the UPS spectra among several samples, each one has a different quantum efficiency, and try to find physics which decide photocathode’s performance. In this case, we focused some characters correlated to the quantum efficiency. I’m going to present a result of this analysis.
منابع مشابه
XPS AND UHV-AFM ANALYSIS OF THE K2CsSb-PHOTOCATHODE GROWTH
Alkali-Antimonide growth was examined at the Center of Functional Nanomaterials (CFN) at Brookhaven National Laboratory (BNL). The materials were grown in a UHV chamber and analyzed by means of core-level xray electron spectroscopy (XPS) and UHV-atomic-force microscopy (UHV-AFM). We were able to grow CsK2Sb cathodes with an average quantum efficiency around 12.5 % under good vacuum conditions.T...
متن کاملCorrelation of CsK2Sb Photocathode Lifetime With Antimony Thickness
This Article is brought to you for free and open access by the Mechanical & Aerospace Engineering at ODU Digital Commons. It has been accepted for inclusion in Mechanical & Aerospace Engineering Faculty Publications by an authorized administrator of ODU Digital Commons. For more information, please contact [email protected]. Repository Citation Mamun, M. A.; Hernandez-Garcia, C.; Poelker, ...
متن کاملRole of alkali cations for the excited state dynamics of liquid water near the surface.
Time-resolved liquid jet photoelectron spectroscopy was used to explore the excited state dynamics at the liquid water surface in the presence of alkali cations. The data were evaluated with the help of ab initio calculations on alkali-water clusters and an extension of these results on the basis of the dielectric continuum model: 160 nm, sub-20 fs vacuum ultraviolet pulses excite water molecul...
متن کاملElectronic Level Structure of Group Iii Heavy Element Clusters Studied by Photoelectron Spectroscopy
UV-photoelectrons of mass-defined indium and thallium cluster anions have been analyzed at a detachment energy of 3.68eV in the size range n = 2-20. The photoelectron threshold energies are in rough agreement with the values predicted by the metal droplet model. A number of low-lying excited states of the neutral-clusters are detected. The high atomic s-orbital binding energies appear to induce...
متن کاملElectron binding energies of aqueous alkali and halide ions: EUV photoelectron spectroscopy of liquid solutions and combined ab initio and molecular dynamics calculations.
Photoelectron spectroscopy combined with the liquid microjet technique enables the direct probing of the electronic structure of aqueous solutions. We report measured and calculated lowest vertical electron binding energies of aqueous alkali cations and halide anions. In some cases, ejection from deeper electronic levels of the solute could be observed. Electron binding energies of a given aque...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2016