SERIES 2600 IMAGING PHOTON
DETECTOR SYSTEMS
2600 Series Imaging, position-sensitive
PMT detector system for ultra violet, visible and near-infrared
photon detection.
The Model 2601B Mepsicron-II™ Single-Photon Imaging Detector System is a high-performance, ultra-low-light-level digital electronic camera /optical detector system. It is designed for demanding, ultra-low-light scientific imaging and spectroscopy applications in the spectral range from below 180 nm to beyond 900 nm. This detector combines the most desirable features of two fundamentally different types of traditional optical detectors into one system. The Mepsicron-II offers the exceptional ultra-low-light sensitivity, signal-to-noise ratio and time-resolved capabilities of a digital, single-photon-counting photomultiplier (PMT) combined with the full X-Y position-sensitivity of a 1-D or 2-D array detector. Although simpler in practice, the system effectively operates much like a 23 mm diameter array of more than 125,000 microscopic (50 x 50 micron) single-photon-counting PMT's, each capable of detecting single photons with an extremely high signal-to-noise ratio. Spectra and images are created by digitally summing successive single-photon digital events. These unique and powerful capabilities have resulted in the Mepsicron-II™ system being successfully used worldwide in a range of specialized applications in physical, chemical and biological science where improved ultra-low-light or time-resolved performance is required compared to more conventional detectors such as CCD's or single-channel (non-imaging) PMT's. Examples of typical applications are:
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MODEL 2601B IMAGING SINGLE-PHOTON
DETECTOR SYSTEM: |
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IMAGING PMT PHOTOCATHODE OPTIONS: (Must specify a photocathode option with order) |
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Model | Description |
Option 050 |
BA-1 Type Photocathode: Blue sensitive with lowest dark count. Minimum guaranteed radiant QE > 12% at 400 nm, typically >15%. Maximum dark count, typically < 20 cts/sec at -25 C (guaranteed maximum 50 cts/sec at -25 deg C). May be operated at room temperature with higher dark count, typically 200-300 cts/sec. |
Option 051 |
S-20 Type Photocathode: Blue-green-red sensitive. Minimum guaranteed radiant QE >15% at 400 nm, typically >17%. Maximum dark count, typically < 110 cts/sec at -25 C (guaranteed maximum > 110 cts/sec at -25 deg C). |
Option 052 |
Super
Gen S-25 Type Photocathode |
Option 053 |
S-25
Type Photocathode. |
Option 055 |
CsRbTe
Type Photocathode |
THERMOELECTRICALLY-COOLED PMT HOUSING OPTIONS: |
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Model | Description |
Option 015 |
Extra Cooling Capacity. Adds extra cooling capacity to achieve minimum of 55 C temperature differential in place of standard 35 C capability. For application sites where available cooling water is above +10 C and lowest dark count performance is desired. Note: An alternative is to use a Neslab-type refrigerated water recirculator to produce cooling water of desired temperature |
Option 017 | Anti-Reflection (AR) Coated, Cooled Housing Window in place of standard. Provides AR coated double-pane insulating entrance window in place of standard UV-grade uncoated fused silica panes. Optimizes transmission in specific spectral ranges. Contact factory for available coatings. |
Option 019 | Non-Cooled PMT Housing in place of standard. For use with Imaging PMT's equipped with photocathode type not requiring cooling (e.g. CsRbTe). Includes cylindrical light-tight housing with adjustable position tube socket assembly. No cooling modules, temperature readout thermocouple or insulating entrance window are provided. |
Option 022 | Reduced-size TE-cooled PMT housing in place of standard. Same features as standard but with smaller overall dimensions of approximately 4.7W" x 5.4H" x 9"D (axial). May exhibit smaller cooling differential of approximately 25 °C cooling water to interior chamber temperature (rather than standard 35 degrees C), requiring colder cooling water to reach comparabe cooled temperature. |
DIGITIZED POSITION OUTPUT OPTIONS: digitization option for Model 2401B |
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Model | Description |
Option 003 |
Add 9-bit Resolution Digitized Output, X and Y Axis. 512 spatial data channels spread across approx 24.5 mm active area diameter. Dead time 5-6 microseconds per event (versus 4 usec analog only); typically exhibits maximum detected count rate of 70,000 cts/sec at which the 1/e dead time loss approaches 60% |
Option 005 | Add 10-Bit Resolution Digitized Output, X and Y Axis. 1024 spatial data channels spread across approx 24.5 mm active area diameter) Dead time 9-10 microseconds per event; typically corresponds to maximum detected count rate of 50,000 cts/sec at which rate the 1/e dead time loss approaches 60%. |
POWER OPTIONS: | |
Model | Description |
Option 070 |
240 VAC, 50 Hz, Power System. Equipped for operation on 220-240 VAC, 50 Hz power in place of standard 110-120 VAC, 60 Hz. Requires approximately 500 watts. |
DATA ACQUISITION/DISPLAY SYSTEMS: Consult factory regarding various data collection/analysis systems available. Also see 2601/Option 080 Technical Description for Time-Resolved Subsystem.
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