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Title: New Methods to Produce and Extend the Spectral Range of Photocathodes for Large Area Photodetectors with mm scale Space Resolution

Abstract

Cornell group has developed recipes to grow photocathodes belonging to the alkali antimonide family using evaporation from elemental sources with and without line of sight between the sources and the glass substrate. Photocathodes were characterized in terms of their quantum efficiency in the spectral range covering the visible and the near infrared part of the spectrum. Two different approaches have been used to demonstrate the growth of high quantum efficiency photocathodes: the first approach makes use of elemental antimony and alkali metals loaded into ceramic crucibles hosted into effusion cells like the one used in molecular beam epitaxy reactors; whereas in the second approach the antimony film is evaporated onto the transparent substrate using effusion cells and then transferred into a different reaction chamber where exposure to the alkali metals coming from an elemental source lacking the line of sight to the substrate is used to produce the photocathode material. The research conducted opens the exploration of alternative methods for the synthesis of photocathodes specifically designed to be implemented over large areas maximizing the production throughput and lowering the cost. It particular, this research can benefit future HEP programs by providing new methods that can be adopted to produce photonmore » detectors for future experiments.« less

Authors:
 [1];  [1]
  1. Cornell University
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1530157
Report Number(s):
DOE-CORNELL-0011643
DOE Contract Number:  
SC0011643
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Bazarov, Ivan, and Cultrera, Luca. New Methods to Produce and Extend the Spectral Range of Photocathodes for Large Area Photodetectors with mm scale Space Resolution. United States: N. p., 2019. Web. doi:10.2172/1530157.
Bazarov, Ivan, & Cultrera, Luca. New Methods to Produce and Extend the Spectral Range of Photocathodes for Large Area Photodetectors with mm scale Space Resolution. United States. https://doi.org/10.2172/1530157
Bazarov, Ivan, and Cultrera, Luca. 2019. "New Methods to Produce and Extend the Spectral Range of Photocathodes for Large Area Photodetectors with mm scale Space Resolution". United States. https://doi.org/10.2172/1530157. https://www.osti.gov/servlets/purl/1530157.
@article{osti_1530157,
title = {New Methods to Produce and Extend the Spectral Range of Photocathodes for Large Area Photodetectors with mm scale Space Resolution},
author = {Bazarov, Ivan and Cultrera, Luca},
abstractNote = {Cornell group has developed recipes to grow photocathodes belonging to the alkali antimonide family using evaporation from elemental sources with and without line of sight between the sources and the glass substrate. Photocathodes were characterized in terms of their quantum efficiency in the spectral range covering the visible and the near infrared part of the spectrum. Two different approaches have been used to demonstrate the growth of high quantum efficiency photocathodes: the first approach makes use of elemental antimony and alkali metals loaded into ceramic crucibles hosted into effusion cells like the one used in molecular beam epitaxy reactors; whereas in the second approach the antimony film is evaporated onto the transparent substrate using effusion cells and then transferred into a different reaction chamber where exposure to the alkali metals coming from an elemental source lacking the line of sight to the substrate is used to produce the photocathode material. The research conducted opens the exploration of alternative methods for the synthesis of photocathodes specifically designed to be implemented over large areas maximizing the production throughput and lowering the cost. It particular, this research can benefit future HEP programs by providing new methods that can be adopted to produce photon detectors for future experiments.},
doi = {10.2172/1530157},
url = {https://www.osti.gov/biblio/1530157}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {6}
}