Specifications; Performance; Bias Supply; Calibration Pulser - Ametek ORTEC Alpha Duo Hardware User's Manual

5. Specifications

Note that these specifications, except where noted, apply to the Alpha Duo and/or Alpha Mega because
these are the major components of the Alpha Ensemble.
5.1

PERFORMANCE

Unless otherwise specified, performance is based on use with a BU-017-450-100 ULTRA™ Series
detector with a good-quality Am-241 point source.
Maximum Sample Size
Duo – 51 mm (2.030 in.)
•
Mega – 106 mm (4.2 in.)
•
Sample-to-Detector Spacing Adjustable from nominally 1 mm to 41 mm in increments of 4 mm using
slide-in sample trays. Maximum distance from detector to bottom of chamber is approximately 44 mm.
Maximum Detector Size
• Duo – 1200 mm
• Mega – 3000 mm
Energy Range 0 to 10 MeV.
Energy Resolution
diameter.
Detector Efficiency ≥25% is achievable with close detector-to-source spacing.
Background Above 3 MeV, ≤1 count/hour based on a BU-020-450-AS detector.
5.2

BIAS SUPPLY

Range 0 ± 100 V, 10 μA; selected and monitored in software.
Bias Computer controlled adjustable in 1 V increments.
Bias Enable/disable Software controlled.
5.3

CALIBRATION PULSER

Range 0 to 10 MeV.
Pulser Computer controls the internal pulser, amplitude with 12-bit (2.5 keV) level settings; set to a
nominal 7 MeV pulse when shipped.
Frequency 100 Hz.
Subject to change without notice.
3
3
2
2
≤ 20 keV (FWHM) with a detector-to-source spacing equal to the detector
25