Signedon front: EG&G inc.
Inscribedon front: HV PULSER
on front, yellow sticker: HARVARD UNIVERSITY PHYSICS DEPT.
on front, white sticker: NEW KRYPTON / Aug. 17 1967 [changed for Sept 5, 1968]
on left side panel, yellow sticker: HARVARD UNIVERSITY PHYSICS DEPT. / M.I.Sc.
on right side panel, on tape: OK at 3kv, Delay ~40 ns, jitter < 2 ns / tested during 10[exp 4] pulses. 27 Aug. 67 P.P.J.
on top, stamped: ag&g / A3
FunctionWhen a high energy beam of particles collided with a target, it triggered thousands of events and scattered particles and photons. These were picked up by detectors, which in turn sent electrical signals (or pulses) to a wide assortment of logical devices for analysis. Logic instruments included count-registers (or scalers), which counted up the events; pulse height analyzers (PHA) like this device, which selected and sorted pulses that fit within certain sized windows; and coincidence counters, which recorded simultaneous events.