T7100: Difference between revisions

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~~The '''~~Tektronix T7100~~''' (P/N~~ 154-0783-00 ~~with P31 phosphor) is the~~ CRT used in the [[7104]] and [[R7103]] analog 1 GHz scopes.

{{CRT

|Manufacturer=Tektronix

|Model=Tektronix T7100

|Part_nos=154-0783-00

|Description=Micro-channel CRT

|Used_in=7104; R7103

|Designers=

}} used in the [[7104]] and [[R7103]] analog 1 GHz scopes.

It features a [[micro-channel plate]] electron beam amplification stage.

[[File:Micro-channel plate diagram.jpg | thumb | 550px | right | MCP diagram<br />(click image to enlarge)]]

Compared to non-MCP high-speed tubes, the T7100 uses reduced beam current and acceleration voltage

Compared to non-MCP high-speed tubes, the T7100 uses reduced beam current and acceleration voltage to achieve high deflection sensitivity, eliminating the need for high amplifier output voltages, thereby boosting amplifier bandwidth.

to achieve high deflection sensitivity, eliminating the need for high amplifier output voltages, thereby boosting

amplifier bandwidth.

The electron beam passes through terminated helical deflection plates (both X and Y axes use

The electron beam passes through terminated helical deflection plates (both X and Y axes use this form of [[distributed deflection plates]] to achieve the necessary bandwidth), followed by an electrostatic scan-expansion lens that increases deflection 4.5 times vertically and 4 times horizontally, before it hits the micro-channel plate (MCP).

this form of [[distributed deflection plates]] to achieve the necessary bandwidth), followed by

an electrostatic scan-expansion lens that increases deflection 4.5 times vertically and 4 times

horizontally, before it hits the micro-channel plate (MCP).

The deflection structures are described in [https://patents.google.com/patent/US4093891 US Patent 4,093,891].

The scan-expansion lens is a "box lens" design, which is discussed on pages 53−55

The scan-expansion lens is a "box lens" design, which is discussed on pages 53−55 of the ''[[Media:7104_maintenance.pdf|7104 maintenance document]]''.

of the ''[[Media:7104_maintenance.pdf|7104 maintenance document]]''.

The MCP consists of parallel channels of 25 μm diameter and offset at a slight angle to the beam.

The inside walls of these channels are coated with resistive material, with a voltage of 700-1050 V applied

The inside walls of these channels are coated with resistive material, with a voltage of 700-1050 V applied between back and front of the plate. Electrons entering a channel hit the wall where they initiate a cascade of secondary electron emission like in a [https://en.wikipedia.org/wiki/Photomultiplier photomultiplier].

between back and front of the plate. Electrons entering a channel hit the wall where they initiate a cascade

of secondary electron emission like in a [https://en.wikipedia.org/wiki/Photomultiplier photomultiplier].

A final 10 kV potential accelerates the beam across a 3 mm gap toward the [[phosphor]] coating.

@@ Line 1: / Line 1: @@
-The '''Tektronix T7100'''  (P/N 154-0783-00 with P31 phosphor) is the CRT used in the [[7104]] and [[R7103]] analog 1 GHz scopes.
+{{CRT
+|Manufacturer=Tektronix
+|Model=Tektronix T7100
+|Part_nos=154-0783-00
+|Description=Micro-channel CRT
+|Used_in=7104; R7103
+|Designers=
+}} used in the [[7104]] and [[R7103]] analog 1 GHz scopes.
 It features a [[micro-channel plate]] electron beam amplification stage.
 [[File:Micro-channel plate diagram.jpg | thumb | 550px | right | MCP diagram<br />(click image to enlarge)]]
-Compared to non-MCP high-speed tubes, the T7100 uses reduced beam current and acceleration voltage
+Compared to non-MCP high-speed tubes, the T7100 uses reduced beam current and acceleration voltage to achieve high deflection sensitivity, eliminating the need for high amplifier output voltages, thereby boosting amplifier bandwidth.
-to achieve high deflection sensitivity, eliminating the need for high amplifier output voltages, thereby boosting
-amplifier bandwidth.
-The electron beam passes through terminated helical deflection plates (both X and Y axes use
+The electron beam passes through terminated helical deflection plates (both X and Y axes use this form of [[distributed deflection plates]] to achieve the necessary bandwidth), followed by an electrostatic scan-expansion lens that increases deflection 4.5 times vertically and 4 times horizontally, before it hits the micro-channel plate (MCP).
-this form of [[distributed deflection plates]] to achieve the necessary bandwidth), followed by
-an electrostatic scan-expansion lens that increases deflection 4.5 times vertically and 4 times
-horizontally, before it hits the micro-channel plate (MCP).
 The deflection structures are described in [https://patents.google.com/patent/US4093891 US Patent 4,093,891].
-The scan-expansion lens is a "box lens" design, which is discussed on pages 53−55
+The scan-expansion lens is a "box lens" design, which is discussed on pages 53−55 of the ''[[Media:7104_maintenance.pdf|7104 maintenance document]]''.
-of the ''[[Media:7104_maintenance.pdf|7104 maintenance document]]''.
 The MCP consists of parallel channels of 25 μm diameter and offset at a slight angle to the beam.
-The inside walls of these channels are coated with resistive material, with a voltage of 700-1050 V applied
+The inside walls of these channels are coated with resistive material, with a voltage of 700-1050 V applied between back and front of the plate. Electrons entering a channel hit the wall where they initiate a cascade of secondary electron emission like in a [https://en.wikipedia.org/wiki/Photomultiplier photomultiplier].
-between back and front of the plate. Electrons entering a channel hit the wall where they initiate a cascade
-of secondary electron emission like in a [https://en.wikipedia.org/wiki/Photomultiplier photomultiplier].
 A final 10 kV potential accelerates the beam across a 3 mm gap toward the [[phosphor]] coating.

T7100: Difference between revisions

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