The associated red LED turns on when the bias voltage is on.

PULSER Front-panel 10-turn locking dial controls the pulser amplitude for energy
calibration. Range: 0 to 10 MeV.

VACUUM PUMP/HOLD/VENT Front-panel, three-position valve controls the
pumping or venting of the vacuum chamber. The HOLD position can be used
to isolate the chamber from the vacuum pump when evacuating other chambers.

E BIAS Front-panel, 20-turn screwdriver control provides a ±10% adjustment of the biased amplifier threshold, to calibrate the lower limit of the energy range at the ENERGY output.

ΔE Front-panel, 20-turn screwdriver control adjusts the biased amplifier gain,
to calibrate the upper limit of the energy range at the ENERGY output. The
amplitude for the upper energy limit can be adjusted from 7.75 V to 10.25 V to
match the input range of the ADC being used.

AMP GAIN Front-panel, 20-turn screwdriver control adjusts the full-scale
calibration of the linear amplifier output (LIN AMP OUT) from 5 MeV to 10 MeV for
a 10-V output pulse amplitude. Factory set for 10 MeV at 10 V.

DETECTOR POLARITY JUMPERS (+/–) Five printed circuit board jumpers select
the polarity of the amplifier gain and the detector bias voltage to match the polarity of voltage required by the detector. Normally shipped in the "+" position for ULTRA-AS Series detectors.

DET BIAS ADJ Rear-panel, one-turn screwdriver control permits adjustment of
the detector bias to the value specified for the installed detector. Variable from 0 to 100 V. Bias polarity is set to match the detector via the Detector Polarity Jumpers.

INPUTS

VACUUM Rear-panel vacuum connector (Swagelok connector for 0.25-in. O.D.
tubing) for connecting the vacuum chamber in the module to a vacuum pump.

EXTERNAL PULSER Rear-panel BNC connector accepts external pulser signals.
Input impedance is 100 Ω, dc-coupled. Input pulse polarity must be opposite that of the detector bias polarity.

OUTPUTS

COUNTS Rear-panel BNC connector provides a NIM-standard positive logic pulse for any detected particle having an energy greater than 2.5 MeV. Used for gross alpha counting, or routing in a multichannel analyzer. Pulse width is 3.5 μs. Output impedance is 50 Ω, dc-coupled.

ENERGY Rear-panel BNC connector provides the linear output signal form the
biased amplifier for connection to an ADC or multichannel analyzer. Output amplitude range is factory set for 0 to +10 V which corresponds to the energy ranges selected by the front-panel ENERGY RANGE switch. See E BIAS and ΔE
controls for output range adjustment and calibration. Output impedance is 100 Ω, dc-coupled.

LIN AMP OUT Rear-panel BNC connector delivers the linear amplifier output signal for connection to an ADC or multichannel analyzer. Factory adjusted for 3 to 10 MeV, corresponding to a 0- to +10-V output pulse amplitude. See AMP GAIN control for calibration adjustment. Output pulse has a unipolar, semi-Gaussian pulse shape with a1-μs shaping time constant. Output impedance is 100 Ω, dc-coupled.

BUSY Rear-panel BNC connector produces a NIM-standard positive logic pulse whenever the module is busy processing a pulse. Can be supplied to an ADC or multichannel analyzer to assist in dead-time corrections when dead-time losses are significant. Output impedance is 10 Ω, dc-coupled.

DET/1.1 MEG OHM/HV Rear-panel test jacks permit monitoring the voltage of the detector bias supply, and the detector load current. The bias supply voltage is read at the HV test jack. The voltage measured between the two test jacks permits calculation of the detector load current flowing through the 1.1-MΩ resistor.

ELECTRICAL AND MECHANICAL

POWER REQUIRED The SOLOIST derives its power from a NIM-standard bin/power supply, such as the ORTEC Model 4001A/4002A, or 4001A/4002D. The power required is +24 V at 120 mA, +12 V at 90 mA, –12 V at 45 mA, and –24 V at 75 mA.

WEIGHT
Net 2.4 kg (5.2 lb).
Shipping 2.3 kg (7.3 lb).

DIMENSIONS NIM-standard, doublewidth module 6.90 x 22.13 cm (2.70 x 8.714 in.) front panel per DOE/ER-0457T.

ACCESSORIES

SPARE CHAMBER GASKETS Replacement O-rings for the vacuum chamber door are available in quantities of 10 in a package.

SAMPLE TRAYS A variety of slide-in sample trays are available to hold different
sample sizes.

VACUUM MANIFOLD The ORTEC Model 576-VM Vacuum Manifold and Control is
recommended for connecting a common vacuum source to four SOLOIST modules.

PORTABLE PUMP STATION The ORTEC Model ALPHA-PPS-115 or -230 Portable
Pump Station is recommended for evacuating the sample chamber in the
SOLOIST. The pump station is available in both 115-V and 230-V ac version, and can be combined with the Model 575-VM Vacuum Manifold to serve multiple
SOLOIST modules. The standard pump station is supplied with 1 m (40 in.) of 1-in. I.D. vacuum hose for connection to the 576-VM, and 0.9 m (36 in.) of 1/4-in. O.D. vacuum hose for coupling the larger hose to the SOLOIST. If different lengths are required, contact the factory for a special order.

MULTICHANNEL ANALYZERS WITH SOFTWARE The ENERGY output of the
SOLOIST is intended for use with a multichannel pulse-height analyzer.

REPLACEMENT DETECTORS Detectors that have been severely contaminated or
otherwise damaged beyond use can be replaced by ordering a new detector of the same size from the ULTRA-AS Series of detectors. Be sure to specify the ULTRA-AS detector with a B Mount.

ORDERING INFORMATION