Quantar Technology Imaging Detector Systems
Description: Open-face, MCP-based, position-sensitive detector heads for particle and EUV/X-ray detection on standard or coated (e.g. CsI, KBr) MCP surface, in vacuum. Fully UHV-compatible.
Sensor head active area diameter: 18 mm, 25 mm, 40 mm and 75 mm circular; 74 x 93mm rectangular. Special sizes available upon request.
Spatial position resolution: 100 (standard) or 400 (high resolution) effective resolvable elements across active area diameter.
Spatial position linearity: typically within 5% of true position (of sensor active dimension). Fixed pattern.
Background count rate: typically less than 10 events per second integrated over entire image.
Bias voltage requirements: microchannel plates and RAE position encoder must be biased by external 2 kV (3 kV for high resolution versions) power supply and resistive biasing network.
Physical dimensions: See outline drawing available upon
request. Shipping weight: Approx. 5 lbs (3 kg).
2601 SERIES IMAGING DETECTOR SYSTEM
Ultimate, true single-photon-counting for superb ultra-low light sensitivity with high signal-to-noise. Exhibits far lower detector noise than CCD cameras.
Spectral range from below 180 nm to above 900 nm.
Exceptionally low detector dark count, typically less than 10-5 counts/pixel/sec in 2-D mode at -25 deg C. No CCD- type readout noise.
Large 23 mm circular active area enables maximum light collection from experiments.
High spatial resolution, typically better than 55 microns FWHM across full 23 mm active area.
Virtually unlimited time-integrated dynamic counting range with digital counting avoids pixel count saturation. No on-chip signal storage is required.
Remarkable 100 psec FWHM single-photon time-resolution available (optional subsystem) combined with single-photon imaging for time-resolved spectroscopy and mapping.
Real-time XY photon display, low cosmic- ray sensitivity, simple operation, user-friendly.
Complete, integrated and factory-tested detector system with optional PC-based data collection and display systems. Reliable operation and dependable support.
Description: Pulse-position processor, 2 axis (X, Y) , includes separate modular 4 channel charge-sensitive preamplifier/shaper with added fast look-ahead channel, plus main electronics module (19" rack mount unit) containing signal processing, metering, edge-gating and power supply circuits. Two preamp gain options are available to match MCP/RAE sensor head types.
Deadtime per event: Depends on spatial digitization resolution; 4 µsec per detected event (basic analog only model and 8-bit digitized option model), 6 µsec (9-bit) and 10 µsec (10 bit) digitized option models. Correspond to maximum output count rates of 60,000 to 100,000 counts/sec with 67% dead time loss with Poisson-distributed event arrival times. See dead time plot.
Pulse-pair resolution: 300 nsec. A second event arriving more than 300 nsec but less than 1µsec after a prior event results in both events vetoed from processing; a second event arriving more than 1 µsec but less than the total dead time after a prior event results in the second event vetoed from processing but the first event is processed; events separated by more than the total dead time results in both events processed. If two events arrive within 300 nsec (and combined amplitude does not exceed upper discriminator setting), both events are counted together as a single event with a calculated position between the true positions. Incoming count rates should be adjusted so the probability of near- simultaneous events is minimal.
Inputs: Four low-level charge signals from MCP/RAE sensor (detector head).
X and Y analog position outputs: approximately 0.5 to 4.5 VDC linearly proportional to coordinate position of event on sensor. Analog strobe output and Z-axis blanking output (for XY monitor) activated when valid data is present on analog XY outputs. Quiescent analog X and Y position output voltage is 2.5 volts.
X and Y digitized outputs: TTL-level, positive-true logic outputs, internal 50 pin ribbon connector, external 50-pin Amphenol-type connector. Includes digital strobe.
Front panel edge-gating controls enable selection of rectangular active area for data acquisition.
Other inputs/outputs: Veto Gate Input; Sum (diagnostic gain output), Analog Rate (for remote count rate meter), Analog Strobe, Z-axis Blanking, Rate, and Busy outputs. 1D/2D data switch selector on digitized options. Switch-selectable front-panel meter monitors Count Rate, Input Level (MCP Gain) and Dead-Time Loss %.
Accessories included: 8 ft (3.3m) preamp cable, XYZ cables, 18" (0.5m) preamp input cables (RG188), rack adapters, manuals.
Power requirements: Switch-selectable, 100/120/200/240 VAC, ±10%, 50-60 Hz, 50 watts.
Physical dimensions: preamp module, 2"H x 5W" x 7"D (51
x 127 x 178mm). Electronic rack unit, 5-1/4"H x 17"W x
18"D (133 x 432 x 560mm). Net wt: 20 lbs (9 kg). Ship
weight: 30 lbs (14 kg). CE-marked versions available for
European installations.
2200 SERIES DATA COLLECTION SYSTEM
Description: Functions as a one or two dimensional, PC-based multichannel analyzer (multiparameter MCA). Requires at least 286 type processor, EGA compatible color graphics adapter/monitor and ISA-type available expansion slot for IO card. Accepts digitized position data from Model 2401B.
Consists of Histogramming Memory (Model 2412A or 2415B), Parallel IO Card (Model 2420B), 11001A Data Cable and MCA Software (either 1D or combined 1D/2D version). Histogramming Memory board is installed in Model 2401B.
The Model 2412A Histogramming Memory has maximum 12 -bit input address (4096 addressable counting channels) and is suitable for 1D spectroscopy or limited 2D imaging (e.g. 6- bits x 6-bits).
The Model 2415B Histogramming Memory has maximum 20-bit input address (1,048,000 addressable counting channels) and is suited for up to full 10-bit x 10-bit imaging. The counts in each channel in the RAM memory are auto-incremented when a corresponding digital event address is received. Memory is dual-ported to enable simultaneous readout by the host computer during data accumulation. Data is transferred to the PC via the Model 2420B Parallel IO Card.
The Model 2251A MCA Software enables control of data
accumulation, display, file storage and retreival, and
operations such as image collapses from 2D to 1D, image
and spectral arithmetic, spectral peak-fitting and printing to
selected printers. The 1D program is available separately. See the
Model 2251A Technical Data brochure for
complete information.
See the FAST Comtec MPA-3 System
for a Windows-based, PCI card data aquistition system. This system will use the analog
outputs from the 2401B position analyzer, fed into a NIM-module type ADC.
Limited Warranty: Quantar Imaging Detectors are covered by a limited 12-month warranty. Certain exceptions apply. The full statement of warranty can be supplied upon request.
Quantar Technology holds US patents or exclusive patent licenses on several MCP/charge encoder imaging technologies. MCP's are subject to special limitations and must be stored under vacuum conditions to prevent damage.
Specifications subject to change without notice. Printed in USA
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Quantar Technology Incorporated - 2620A Mission Street, Santa Cruz, CA 95060-5703 Tel: 831-429-5227 · FAX: 831-429-5131 · www.quantar.com |