Application of atomic layer deposited microchannel plates to imaging photodetectors with high time resolution

作者：Siegmund O H W^*; McPhate J B; Tremsin A S; Vallerga J V; Ertley C D; Richner N J; Gerard T M; Frisch H J; Elam J W; Mane A U; Wagner R G; Minot M J; O'Mahony A; Craven C A

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2015, 787: 110-113.

DOI：10.1016/j.nima.2014.11.047

• Photon counting
• Microchannel plate
• Imaging
• GaN: Cherenkov: Bialkali

Novel microchannel plates have been constructed using borosilicate glass micro-capillary array substrates with 20 mu m and 10 mu m pores and coated with resistive, and secondary electron emissive, layers by atomic layer deposition. Microchannel plates in 33 mm, 50 mm and 20 cm square formats have been made and tested. Although their amplification, imaging, and timing properties are comparable to standard glass microchannel plates, the background rates and lifetime characteristics are considerably improved. Sealed tube detectors based on the Planacon tube, and a 25 mm cross delay line readout tube with a GaN(Mg) opaque photocathode deposited on borosilicate microchannel plates have been fabricated. Considerable progress has also been made with 20 cm microchannel plates for a 20 cm format sealed tube sensor with strip-line readout that is being developed for Cherenkov light detection.

• 出版日期2015-7-1