AVS 62nd International Symposium & Exhibition
    Vacuum Technology Wednesday Sessions
       Session VT-WeA

Paper VT-WeA10
An Ultra-high Vacuum Processing System for Constructing Small Format Photodetectors

Wednesday, October 21, 2015, 5:20 pm, Room 230B

Session: Vacuum Quality and Partial Pressure Analysis
Presenter: John Noonan, Argonne National Laboratory
Authors: D.R. Walters, Argonne National Laboratory
R.J. Wagner, Argonne National Laboratory
J. Noonan, Argonne National Laboratory
L. Xia, Argonne National Laboratory
J. Xie, Argonne National Laboratory
J. Wang, Argonne National Laboratory
H. Zhao, Argonne National Laboratory
M. Virgo, Argonne National Laboratory
Correspondent: Click to Email
The Large Area Picosecond Photodetector was envisioned to be a frugal design for use in upcoming water-based Cherenkov photodetectors for the detection of neutrinos. This project’s goal is to develop a glass enveloped 20 cm photodetector but to understand the issues of constructing such a detector a smaller 6 cm format was chosen to be the vehicle for parts and process development. An ultra-high vacuum system was designed and constructed for handling the sub-assemblies. This multi-chamber system is integrated so that the scrubbing, photocathode deposition, and hermetic sealing all occur within a single environment. The design of this system has process stations in adjacent chambers so that the sub-assemblies can be easily moved using magnetic linear manipulators. The vacuum performance of the system will be presented along with results on the efficiency of the photocathode, >15%, the clean-up of the scrubbing, and a brief overview of the indium vacuum seal.