Temperature dependence of alkali-antimonide photocathodes: Evaluation at cryogenic temperatures
نویسندگان
چکیده
منابع مشابه
Origin and temperature dependence of radiation damage in biological samples at cryogenic temperatures.
Radiation damage is the major impediment for obtaining structural information from biological samples by using ionizing radiation such as x-rays or electrons. The knowledge of underlying processes especially at cryogenic temperatures is still fragmentary, and a consistent mechanism has not been found yet. By using a combination of single-crystal x-ray diffraction, small-angle scattering, and qu...
متن کاملPreparation and study of properties of a few alkali antimonide photocathodes
A new processing technique for a few alkali antimonide photocathodes is described. This technique does not require an initial antimony layer as in the conventional techniques. Electron microscopic examination of the antimony film shows that the antimony film is affected by ambient gases, and the improvement of senistivity which results in this technique is thought to be due to the absence of it...
متن کاملSputter Growth of Alkali Antimonide Photocathodes: an in Operando Materials Analysis*
Alkali antimonide photocathodes are a strong contender for the cathode of choice for next-generation photon sources such as LCLS II or the XFEL. These materials have already found extensive use in photodetectors and image intensifiers. However, only recently have modern synchrotron techniques enabled a systematic study of the formation chemistry of these materials. Such analysis has led to the ...
متن کاملRefractive Index of ZnSe at Cryogenic Temperatures†
This report describes an extensive data set on the refractive index of ZnSe that provides full high resolution coverage of the CRIRES operating range in both wavelength and temperature. By combining our prototype instrument model of CRIRES with these data our project to provide wavelength calibration for IR Echelle spectrographs (WIRE) has reached an important milestone and is ready to support ...
متن کاملEffect of Roughness on Emittance of Potassium Cesium Antimonide Photocathodes*
Here we present first measurements of the effect of roughness on the emittance of K2CsSb photocathodes under high fields. We show that for very thin cathodes the effect is negligible at up to 3 MV/m but for thicker and more efficient cathodes the effect becomes significant. We discuss ways to modify the deposition to circumvent this problem.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Accelerators and Beams
سال: 2017
ISSN: 2469-9888
DOI: 10.1103/physrevaccelbeams.20.103403