CHANNEL ELECTRON MULTIPLIER HAVING TWO OR MORE RESISTIVE COATING LAYERS IN DIFFERENT ZONES ALONG ITS LENGTH AND METHOD TO PRODUCE THE SAME

(19)

(11)

EP 3 591 687 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A1)

(48)	Corrigendum issued on:
	15.04.2020 Bulletin 2020/16

(43)	Date of publication:
	08.01.2020 Bulletin 2020/02

(21)	Application number: 19183768.1

(22)	Date of filing: 02.07.2019

(51)

International Patent Classification (IPC):

H01J 43/10^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME
	Designated Validation States:
	KH MA MD TN

(30)

Priority:

02.07.2018 US 201862693076 P

(71)	Applicant: Photonis Scientific, Inc.
	Fiskdale, MA 01518 (US)

(72)	Inventor:
	BREUER, Matthew Hadley, MA Massachusetts 01035 (US)

(74)	Representative: Mewburn Ellis LLP
	City Tower 40 Basinghall Street London EC2V 5DE London EC2V 5DE (GB)

(54)	CHANNEL ELECTRON MULTIPLIER HAVING TWO OR MORE RESISTIVE COATING LAYERS IN DIFFERENT ZONES ALONG ITS LENGTH AND METHOD TO PRODUCE THE SAME

(57) A channel electron multiplier having a high aspect ratio and differential coatings along its channel length is disclosed. The elongated tube (12) has an input end (14), an output end (16), and an internal surface (18) extending along the length of the tube between the input end and the output end. The channel electron multiplier also has first and second conductive layers (21, 23) located on the interior in adjacent zones on the surface of the tube (12). The first conductive layer (21) is selected to provide a first electrical resistance, a first electron emission characteristic, or both, and the second conductive layer (23) is selected to provide a second electrical resistance, a second electron emission characteristic, or both. A method of making a channel electron multiplier having two or more different conductive layers is also disclosed.