| 576A
Dual Alpha Spectrometer
Specifications
PERFORMANCE
SYSTEM NOISE ≤24 keV FWHM for 300- and 450-mm2 detectors and ≤35 keV
FWHM for 600-mm2 detectors (at 22°C).
BACKGROUND <30 counts/day above 3.0 MeV (measured from
COUNT output) with 300- and 450-mm2
active area, both R-Series and ULTRA detectors; and
<40 counts/day for 600-mm2 active area, both with R-Series
and ULTRA detectors.
SAMPLE SIZE Up to 3.8 cm (1.5 in.) diameter planchets
or filter paper for vertical sample holder; up to 2.54 cm
(1.0 in.) diameter for horizontal sample holder.
SAMPLE SPACING Adjustable from 1 to 15 mm from
detector housing for vertical sample holder. Either 1 or 5
mm from detector housing for horizontal sample holder.
ENERGY RANGES Separately selectable for each
channel: 3 to 5 MeV, 3 to 7 MeV, 4 to 6 MeV, 4 to 8 MeV,
5 to 7 MeV, or 5 to 9 MeV. Limited operation from 0 to 2
MeV or 0 to 4 MeV.
NONLINEARITY <±0.1% of full-scale energy (5, 6, 7, 8,
or 9 MeV as selected) in accordance with IEEE Standard
No. 301-1988.
ELECTRONIC SYSTEM INSTABILITY ≤±0.15% of fullscale
energy for 22°C in accordance with IEEE Standard
No. 301-1988.
DETECTOR VOLTAGE SUPPLIES Fixed at 50 V to
preamplifier section; polarity individually selectable on
printed wiring board (PWB) for each channel. The Model
576A is shipped with the bias polarity positive when
equipped with ULTRA detectors, and negative when
equipped with Ruggedized detectors.
PULSER 50 ppm/°C; rate ~100 counts/s.
CONTROLS
VACUUM FACILITY Rear-panel vacuum pump
connector for connection to roughing pump or vacuum
manifold; Swagelok® connector for 1/4-in. O.D. tubing.
PUMP/VENT Two-position, front-panel valve control
selects either the vacuum line or atmospheric pressure
for both chambers.
DETECTOR VOLTAGE On/Off toggle switch with LED
indicator on front panel controls power to both detector
voltage supplies.
PULSER (OPERATE/TEST) Front-panel toggle switch
turns on both pulsers for Test and turns off both pulsers
for Operate.
RANGE Front-panel, two-position toggle switch. Allows
selection of an energy span of 2 MeV or 4 MeV above
biased amplifier energy level selected by PWB jumper
J4.
ORDERING INFORMATION
When purchasing detectors separately, please indicated "for use with
Model 576A Dual
Alpha Spectrometer" on your purchase order, and specify the geometrical
configuration
desired (vertical or horizontal). Detector extraction tools are not
supplied with this model.
| Model |
Description |
| 576A-XXXV |
576A module without
Detectors; Vertical Sample Holder |
| 576A-XXXH |
576A module without
Detectors; Horizontal Sample Holder |
| with ULTRA-AS
Detectors |
| 576A-300UV |
Vertical 576A
module with two 300-mm2 ULTRA-AS |
| 576A-450UV |
Vertical 576A
module with two 450-mm2 ULTRA-AS |
| 576A-600UV |
Vertical 576A
module with two 600-mm2 ULTRA-AS |
| 576A-300UH |
Horizontal 576A
module with two 300-mm2 ULTRA-AS |
| 576A-450UH |
Horizontal 576A
module with two 450-mm2 ULTRA-AS |
| 576A-600UH |
Horizontal 576A
module with two 600-mm2 ULTRA-AS |
| with Ruggedized
Detectors |
| 576A-300RV |
Vertical 576A
module with two R-Series (300-mm2 , 100µm deep) |
| 576A-450RV |
Vertical 576A
module with two R-Series (450-mm2 , 100µm deep) |
| 576A-600RV |
Vertical 576A
module with two R-Series (600-mm2 , 100µm deep) |
| 576A-300RH |
Horizontal 576A
module with two R-Series (300-mm2 , 100µm deep) |
| 576A-450RH |
Horizontal 576A
module with two R-Series (450-mm2 , 100µm deep) |
| 576A-600RH |
Horizontal 576A
module with two R-Series (600-mm2 , 100µm deep) |
- Vertical models include two 576-SHAV-K sample holder assembly
kits (unless other sample holders are requested) and one 576-DETV
detector extraction tool.
- Horizontal models include two 576-HTH horizontal sample tray
holders, two 576-HT horizontal sample trays, and one 576-DETH detector
extraction tool.
Accessories and Sample Holder Assemblies
| Model |
Description |
| 576-DETH |
Horizontal Detector
Extraction Tool |
| 576-DETV |
Vertical Detector
Extraction Tool |
| 576-HTH |
Horizontal Sample
Tray Holder |
| 576-HT |
Horizontal Sample
Tray |
| 576-OVC |
Spare O-Rings |
| 576-SHAV-S |
Customized Sample
Holder |
| 576-SHAV-K |
Sample Holder
Kit (includes 576-SHAV-1, 576-SHAV-2, 576-SHAV-4, and 576-SHAV-5) |
| 576-SHAV-1 |
Vertical Sample
Holder (for use with 1" x 0.025" thick flat metal planchet) |
| 576-SHAV-2 |
Vertical Sample
Holder (for use with 1.25" x 0.025" thick flat metal planchet) |
| 576-SHAV-3 |
Vertical Sample
Holder (for use with 25-mm filter paper) |
| 576-SHAV-4 |
Vertical Sample
Holder (for use with 37-mm filter paper) |
| 576-SHAV-5 |
Vertical Sample
Holder (for use with .75" x 0.025" thick flat metal planchet) |
| 576-VCD |
Vacuum Chamber
Door |
| |
Sample Holder Dimensions
(Diameter) |
Retaining Ring Dimensions
(Diameter) |
|
Model
|
A |
B |
C |
D |
| 576-SHAV-1 |
1.500 |
1.010 |
1.555 |
.910 |
| 576-SHAV-2 |
1.500 |
1.260 |
1.555 |
1.160 |
| 576-SHAV-3 |
1.000 |
No C Bore |
1.055 |
0.890 |
| 576-SHAV-4 |
1.500 |
No C Bore |
1.555 |
1.390 |
| 576-SHAV-5 |
1.000 |
0.765 |
1.055 |
0.670 |
|
