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That's a DeForest  DL4 next to it for size comparision

Raytheon 8602/CK1383A Recording storage CRT This is a storage and scan-conversion tube, not specifically intended for computer use but could be used that way.  It's a variant of the 7702 (7702 offers either magnetic or electrostatic focusing; this one offers only magnetic).  It can be written-into, then will hold the information for hours and provide thousands of readout scans.  Has separate "write" and "read" guns.  Typical use was "slowing-down" of radar video for transmission over phone lines. This is an analog device with 1200 lines of resolution, so in digital terms it was in the megapixel range, each pixel had a shades-of-gray capability, which nominally expands the equivalent digital capacity a lot more.