Count Room Equipment: Counters and Scalers

Vocabulary practice flashcards covering count room counters and scalers including the Canberra iSolo, Ludlum Model 3030, Ludlum Model 2929, and Protean 9400 MPC.

Canberra iSolo

A counting system featuring a solid state silicon gas-less detector, unshielded detector construction weighing $5\,\text{pounds}$, and push button key pad controls for measuring alpha and beta radiation.

Canberra iSolo Detector Window

An ultra thin, rugged window that can be cleaned with cotton and rubbing alcohol.

Canberra iSolo Source Check

A quality check performed daily before use in accordance with "Canberra ISOLO Alpha-Beta Counting System Operation," utilizing two check sources to determine reference values.

Ludlum Model 3030 Alpha Beta Sample Counter

A sample counter used to measure radioactivity collected on smears and air samples (alpha and beta) utilizing a ZnS (Ag) activated zinc sulfide scintillation detector.

Ludlum Model 3030 Detector Shielding

A shielded chamber and chrome plated brass sample tray designed to house and shield the sample during measurement.

Ludlum Model 3030 Detector Window

A $0.4\,\text{mg/cm}^2$ aluminized Mylar window.

Ludlum Model 3030 Count Time Settings

Operator-selectable count times in minutes set to $0.1$, $0.5$, $1$, $2$, $5$, $10$, or user defined.

Ludlum Model 3030 Sample Counting Procedure

The procedure in which a sample is placed in the slide draw (sample tray), the tray is closed and latched, the counter is set, and the Count Button is pressed; results appear in the beta and/or alpha channel as total counts, cpm, or dpm.

Ludlum Model 2929 Alpha Beta Sample Counter

An alpha-beta sample counter utilizing a ZnS (Ag) activated zinc sulfide scintillation detector and an unshielded detector with a magnetically shielded two-inch photomultiplier tube.

Hold Switch (Ludlum Model 2929)

An operator-adjustable control that stops the count without resetting the scaler display.

Time Multiplier Switch (Ludlum Model 2929)

A control offering options of $0.1$, $1.0$, $10$, or EXT used in combination with a thumb wheel to set the count time in minutes.

Ludlum Model 2929 Sample Counting Procedure

A process performed in the same manner as the Ludlum Model 3030, with the specific requirement that the drawer must be closed and locked for the sample counting process to begin.

Protean 9400 MPC

A gas flow proportional counter designed to measure alpha, beta, gamma, and X-ray radiation.

Protean 9400 MPC Detector Shielding

Features no shielding in most units, or is configured with a $1.75\text{-inch}$ lead shield and cosmic radiation guard detector.

Protean 9400 MPC Detector Window

An ultra thin $80\,\text{ug/cm}^2$ window.

Protean 9400 MPC Operator Controls

A push button key pad configured with six categories of routines through which the operator sequentially steps across layers of functions and parameters.

Health Physics Sample Counter Checks

The standard procedure governing daily, before-use source checks for the Ludlum Model 3030 and Protean 9400 MPC, as well as Protean 9400 MPC sample counting procedures.