X-123CdTe Detection System

The X-123CdTe is a complete solution for X-ray and gamma radiation detection in one compact package that fits easily in your hand.

X-123CdTe includes:

CdTe X-ray and gamma radiation detector with preamplifier;
Digital pulse processor and analyzer;
Power supply and software compatible with your PC.

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Advantages

Compactness of the system;
Easy to use;
Small size (7 x 10 x 2.5 cm);
Low power consumption (2.5 W)
Light weight (180 g);
USB and RS232 connectors.

Application

Detection of X-rays and gamma rays in medicine: mammography, radiology;
X-ray fluorescence analysis;
Art and Archaeology;
Portable X-ray and gamma radiation detectors;
Study of X-ray and gamma radiation;
Education;
Radiation safety control;
Detection of uranium and plutonium.

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Detector

CdTe X-ray and gamma radiation detector;
2-stage thermoelectric cooling;
Area: 9 or 25 mm2;
Thickness: 1 mm.

General characteristics

Resolution at 122 keV <1.2 keV (full width at half maximum);
Optimal energy range: from 5 keV to 150 keV;
Maximum counting speed: up to 2 x 105 events per second.

The X-123 is the result of 14 years of development of X-ray detectors by Amptek. The company's philosophy has always been to produce compact, low power consumption, high performance detectors that are easy to operate. The X-123CdTe is an example of this philosophy and is a combination of the XR-100CdTe X-ray and Gamma Detector and its charge sensitive preamplifier; DP5 digital pulse processor, MCA, software and PC5 power supply. All this requires only +5 VAC and a connection to a computer via USB or RS232.

PC connection diagram

Fig.4 Block diagram of X-123 and connection diagram.

Characteristics of X-123CdTe

General

Energy resolution at 122 keV, on 57Co

9 mm2: <1.2 keV FWHM

25 mm2: <1.5 keV FWHM

Energy range

From 5 to 150 keV. Can operate outside this range, but with less efficiency.

Maximum counting speed

Depends on peak time. Recommended parameters are presented in the table below.

Peak time DP5 (µs)	2.4	6.4	25.6
Formation time (µs)	1.0	2.9	11.16
Recommended maximum speed	1.2 x 10 ⁵	4.6 x 10 ⁴	1.2 x 10 ⁴

Detector and preamplifier

Detector type

CdTe

Detector area

9 mm2 or 25 mm2

Detector thickness

1 mm

Beryllium (Be) window thickness

4 mil (100 µm)

Thermoelectric cooling

2-stage

Preamplifier

Standard, from Amptek.

Digital Pulse Processor

Gain

Combination of coarse and fine gain provides continuous gain from 0.84 to 127.5

Rough amplification

Software selectable from 1.12 to 102.0 in 16 steps:

1.12, 2.49, 3.78, 5.26, 6.56, 8.39, 10.10, 11.31,

14.56, 17.77, 22.42, 30.83, 38.18, 47.47, 66.26, 102.0

Subtle enhancement

Software selectable from 0.75 to 1.25, with 10-bit resolution.

Full scale

1000 mV input pulse at gain X1

Stability

<20 ppm/°C (typical)

Pulse shape

Trapezoid

Peak time

30 different software selectable values from 0.8 to 102 µs, corresponding to semi-Gaussian shaping times from 0.4 to 45 µs.

Dead time

1.05 peak time. No conversion time.

Two-pulse resolution time

120 nano seconds

Multi-Channel Pulse Amplifier (MCA)

Number of channels

Software selectable: 8,000; 4,000; 2,000; 1,000; 500; or 250 channels

Preset

Time, total number of invoices, number of invoices per ROI, number of invoices transmitted via 1 channel

Connectors

USB

USB 2.0 (12 Mbps)

Serial

Standard RS232

Ethernet

10base-T

Nutrition

Nominal input

+5 VDC at 500 mA (2.5 W) (typical). Current is highly dependent on the detector's ΔT. Range is 300 to 800 mA at 5 VDC. AC adapter included.

Input voltage range

From 4 V to 6 V (at currents 300 - 200 mA, 500 mA — maximum)

High voltage

Internal multiplier, software controlled, from 500 to 750V

Cooling power supply

Feedback controller ΔTmax= 85 °C

General

Operating temperature

From -20 °C to +50 °C

Guarantee

1 year

Average service time

5 - 10 years, depending on use

Storage and transportation

Long shelf life: 10+ years in dry environment

Typical Storage and transport: -20°C to +50°C, 10 to 90% humidity non-condensing

Correspondence

RoHS compliant

TUV Certification

Certificate No.:CU 72101153 01

Tested to: UL 61010-1: 2009 R10.08

CAN/CSA-C22.2 61010-1-04 + Gi1

Connectors

USB

Standard USB Mini connector. (The X-123SDD is not USB powered.)

RS232

Standard 2.5mm headphone jack.

Tip	Transmit	To obtain PC DB9 pin 2 (on DB25 pin 3)
Ring	Receive	For PC transmission DB9 pin 3 (to DB25 pin 2)
Sleeve	Earth	For PC Ground DB9 pin 5 (on DB25 pin 7)

Ethernet

Standard Ethernet connector (RJ-45)

Nutrition

Hirose MQ172-3PA (55), Plug Mating: MQ172-3SA-CV

Auxiliary

2x8 16-pin 2mm spacing (Samtec part number ASP-135096-01). Mates with (Samtec P/N TCMD-08-S-XX.XX-01. Top row odd contacts, bottom row pin. Top right contact = 1, bottom right contact = 2.

Pin #	Name	Pin #	Name
1	SCA1	2	SCA2
3	SCA3	4	SCA4
5	SCA5	6	SCA6
7	SCA7	8	SCA8
9	AUX_IN_1	10	AUX_OUT_1
11	AUX_IN_2	12	AUX_OUT_2
13	IO2	14	IO3
15	GND	16	GND

Software interface

DPPMCA

X-123CdTe can be controlled using Amptek DPPMCA utility and dedicated software. This program completely controls and configures X-123, receives and displays this data. DPPMCA software includes an interface for XRF analysis. It runs under Windows XP PRO SP3 or later.

SDK

X-123CdTe comes with a free software development kit (SDK). The user can use this kit to write their own code to control X-123CdTe to solve their own problems.

VB demo software

The VB demo software runs on a personal computer and allows the user to configure the X-123CdTe, start and stop data collection, and save data files. It comes with source code and can be modified by the user. This software is intended to demonstrate how to control the X-123CdTe manually or via the USB or RS-232 interface using basic commands without the SDK.

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