Abstract
We report on the principle, design, fabrication, and characterization of a large-area planar bialkali photocathode. Sequential photocathode growth process was investigated, and the growth parameters, especially the initial antimony layer thickness, were optimized. The source arrangement and configuration were also simulated and the preferred configuration was chosen for numerical and experimental studies. Photocathode with average QE of 18% and activation area of ∼40 square inches was experimentally demonstrated, making it a candidate for MCP-based photodetector applications. Further improvements were also discussed to enhance the uniformity and QE value of the photocathodes.
| Original language | English |
|---|---|
| Article number | 163234 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Volume | 955 |
| DOIs | |
| State | Published - Mar 1 2020 |
| Externally published | Yes |
Funding
The authors wish to acknowledge the great assistance from P. Hink, Y. Li, R. Hosier, and J. DeFazio from Photonis, USA. We would like to thank H. Frisch, K. Byrum and all the collaborators on the LAPPD project for their valuable guidance. We would also like to thank J. Gregar and R. Northrop for their excellent work on making the glass photocathode deposition vessel. We gratefully acknowledge an anonymous reviewer whose insightful comments helped improve and clarify this manuscript. Work at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics under contract DE-AC02-06CH11357. Use of the Center for Nanoscale Materials was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. The authors wish to acknowledge the great assistance from P. Hink, Y. Li, R. Hosier, and J. DeFazio from Photonis, USA. We would like to thank H. Frisch, K. Byrum and all the collaborators on the LAPPD project for their valuable guidance. We would also like to thank J. Gregar and R. Northrop for their excellent work on making the glass photocathode deposition vessel. We gratefully acknowledge an anonymous reviewer whose insightful comments helped improve and clarify this manuscript. Work at Argonne National Laboratory was supported by the U.S. Department of Energy , Office of Science, Office of High Energy Physics under contract DE-AC02-06CH11357 . Use of the Center for Nanoscale Materials was supported by the U.S. Department of Energy , Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357 .
| Funders | Funder number |
|---|---|
| Office of Basic Energy Sciences | |
| Office of High Energy Physics | |
| U.S. Department of Energy | |
| Office of Science | |
| High Energy Physics | DE-AC02-06CH11357 |
| Argonne National Laboratory |
Keywords
- Bialkali antimonide
- Large-area planar photodetector
- Microchannel plate
- Photocathode
- Photomultiplier tube