Radiation Detection Instruments

Vocabulary flashcards covering radiation detection equipment, survey meters, rate meters, detector specifications, and operator controls.

Thermo Electron's SHM4A Single-Hand Alpha Monitor

A single-hand monitor for monitoring personnel areas where alpha-emitting radionuclides exist, featuring a ZnS (Ag) scintillation detector, a $1.2\,\text{mg/cm}^2$ Mylar window, sensitivity to the full spectrum of alpha radiation, and an $8\,\text{hour}$ battery life.

Ludlum Model 177 Series

A count rate meter utilizing scintillation or GM detectors for Alpha, Beta-Gamma, and Alpha-Beta-Gamma detection, operating on AC power or a $6\text{-volt}$ rechargeable battery, with an alarm recommended to be set at $100\,\text{cpm}$ above background.

Eberline RM-25

A less used count rate meter similar in operation to the Ludlum Model 177, utilizing scintillation probes for Alpha, Beta-Gamma, and Alpha-Beta-Gamma detection and having a temperature range of $32^\circ\text{F} - 1200^\circ\text{F}$.

Electra Portable Rate Meter

A rate meter using GM and scintillation probes (primarily the DP6 Dual Scintillation Probe) with an analogue barograph display, audible indication of measured rate, and a locked cpm mode.

E-600 Digital Survey Meter

A digital survey meter compatible with GM and scintillation probes for Alpha and Beta detection, equipped with controls such as Gross/Net counts display and Log Data, which can be attached to a REM Ball for measuring neutrons.

Ludlum Model 3 Survey Meter

A survey meter compatible with any GM probe offered by Ludlum and most Ludlum scintillation probes, controlled by a $6\text{-position}$ range selector switch ($\text{OFF, Battery, X100, X10, X1, X0.1}$"), an Audio toggle (ON/OFF), and a Fast-Slow Toggle.

DP6 Dual Scintillation Probe

The primary detector probe used with the Electra Portable Rate Meter for measuring Alpha and Beta radiation.

REM Ball

An attachment used in conjunction with the E-600 Digital Survey Meter for the measurement of neutrons.

SHM4A RES Button

An operator control on Thermo Electron's SHM4A Single-Hand Alpha Monitor used to zero the meter.

Ludlum Model 177 Alarm Set Selector Switch

An $11\text{-position}$ selector switch on the Ludlum Model 177 Series used to establish alarm thresholds, which should be set at $100\,\text{cpm}$ above background.