3300 SERIES MCP/RAE SENSOR HEADS
3300 Series UHV-compatible, Open-Face Sensors for detection of charged
particles, neutrals and energetic UV and soft x-ray photons. Detection
occurs directly on MCP surface. For use with Quantar Technology's
2400/2500 Series Electronic Position Analyzers.
18 MM Sensors Heads
| Model 3318A |
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Open-Face MCP/RAE Sensor
18 mm active area diameter, 2 MCP, standard spatial resolution (100
resolvable elements across 18 mm diameter, 180 microns FWHM). 1.5 inch
(38.1 mm) overall diameter. |
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| Option 001/SE: |
Add electrically isolated front ring |
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| Option 002/SH: |
Install RAE encoder compatible with 2500 Series
Position Analyzers in place of standard |
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| Option 003/SM: |
High bias current (HOT) MCP's in place of standard
MCP's; normally ordered with Opt 002/SH. |
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25 MM Sensors Heads
| Model 3390A |
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Open-Face MCP/RAE Sensor
25 mm active area diameter, 2 MCP, standard spatial resolution (100
resolvable elements across 25 mm diameter, 250 microns FWHM). 2.0 inch
(50.8 mm) overall diameter. |
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| Option 001/SE: |
Add electrically isolated front ring |
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| Option 002/SH: |
Install RAE encoder compatible with 2500 Series
Position Analyzers in place of standard |
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| Option 003/SM:
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High bias current (HOT) MCP's in place of standard
MCP's; normally ordered with Opt 002/SH. |
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| Model 3391A |
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Open-Face MCP/RAE Sensor, High Spatial Resolution
25 mm active area diameter, 5 MCP, high spatial resolution (400
resolvable elements across 25 mm diameter, 65 microns FWHM). Compatible
only with 2400 Series Position Computer/Analyzers with option EP
preamp. 2.0 inch (50.8 mm) overall diameter). |
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| Option 001/SE:
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Add electrically isolated front ring |
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40 MM Sensors Heads
| Model 3394A |
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Open-Face MCP/RAE Sensor
40 mm active area diameter, 2 MCP, standard spatial resolution (100
resolvable elements across 40 mm diameter, 400 microns FWHM). 2.9 inch
(73.7 mm) overall diameter. |
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| Option 001/SE:
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Add electrically isolated front ring |
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| Option 002/SH:
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Install RAE encoder compatible with 2500 Series
Position Analyzers in place of standard |
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| Option 003/SM:
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High bias current (HOT) MCP's in place of standard
MCP's; normally ordered with Opt 002/SH. |
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| Option SK:
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6.4 mm ID center hole in detector. Consult factory. |
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| Model 3395A |
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Open-Face MCP/RAE Sensor, High Spatial Resolution
40 mm active area diameter, 5 MCP, high spatial resolution (400
resolvable elements across 40 mm diameter, 100 microns FWHM).
Compatible only with 2400 Series Position Analyzers with option EP
preamp. 2.9 inch (73.7 mm) overall diameter. |
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| Option 001/SE:
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Add electrically isolated front ring |
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75 MM Sensor Heads
| Model 3392A |
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Open-Face MCP/RAE Sensor
75 mm active area diameter, 2 MCP, standard spatial resolution (100
resolvable elements across 75 mm diameter, 750 microns). 5.5 inch
(139.7 mm) overall diameter (see drawing for shape). Higher spatial
resolution version also available upon request. |
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| Option 001/SE:
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Add electrically isolated front ring |
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| Option 002/SH:
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Install RAE encoder compatible with 2500 Series
Position Analyzers in place of standard |
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| Option 003/SM:
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High bias current (HOT) MCP's in place of standard
MCP's; normally ordered with Opt 002/SH. |
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| Option SK:
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6.4 mm ID center hole in detector. Consult factory. |
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80 x 100 MM Rectangular
Sensor Heads
| Model 3398A |
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Open-Face MCP/RAE Sensor
74 x 93 mm rectangular active area diameter, 2 MCP, standard spatial
resolution (100 resolvable elements, FWHM, across 80 mm and 100 mm
active dimensions). Fits in 5.8 inch (147.4 mm) overall diameter circle
(see outline drawing for exact shape). |
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| Option 001/SE:
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Add electrically isolated front ring |
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| Option 002/SH:
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Install RAE encoder compatible with 2500 Series
Position Analyzers in place of standard |
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| Option 003/SM:
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High bias current (HOT) MCP's in place of standard
MCP's; normally ordered with Opt 002/SH. |
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| Other options (e.g. 3 MCP's configurations, center holes for
incident beams, other special characteristics), are available for
certain models of these detectors upon request. Custom size detectors
can also be supplied (8 x 50 mm, etc). Please contact factory for more
information. |
| Replacement Parts and Accessories |
| Model 11020A |
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Replacement 25 MM Microchannel Plate (MCP)* |
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| Model 11020A/SM |
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Replacement HOT-type 25 MM Microchannel Plate (MCP)* |
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| Model 11021A |
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Replacement 40 MM Microchannel Plate (MCP)* |
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| Model 11021A/SM |
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Replacement HOT-type 40 MM Microchannel Plate (MCP)* |
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| *Replacement of MCPs in field requires special facilities and
trained personnel. Contact Quantar Technology Customer Support for
details. MCP's must be operated and stored under dry UHV
vacuum conditions at all times except for short periods, to
avoid warpage/fracture. |
HV Power Supplies, Bias Voltage Dividers, Vacuum Flanges and
Cable Sets Available Upon Request.
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Special Notes:
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Spatial Resolution Specifications:
Spatial resolution is measured by projecting a very narrow line (1-D)
or a small diameter point (2-D) image and measuring the FWHM of the
spread function (which is approximately Gaussian in shape) for a large
number of imaged events. This is defined as the width of a "Resolvable
Element." The centroid of such a distribution is determinable, in
general, to better than 50% of the FWHM.
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Electrically Isolated Front Rings (option 001/SE)
Electrically isolated ring options provide an additional metal ring
approximately 0.125 inches (3.1 mm) in front of the standard front ring
of the sensor which is at the electrical potential of the first MCP
input surface. This added ring may be used for either mounting the
sensor (to an aperture plate, for example, that may be at a different
electrical potential than the first MCP input surface) or used for
mounting an accelerating or retarding grid or other device in front of
the sensor. Except in the Model 3992A (75 mm sensor) the added rings
are not removable without disassembly of the sensor. They can be biased
using a contact pin provided on the rear of the baseplate.
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RAE Compatible with 2500 Series Positions Analyzers
(Option 002/SH)
This option provides for a shorter-time constant, lower-resistance RAE
in place of the standard RAE. All other aspects of the MCP/RAE sensor
are standard. This option is offered in a 2 MCP configuration.
The shorter-time constant (X10) RAE is necessary to be compatible with
the shaping time of the preamplifiers in the Quantar Technology 2500
Series Position Analyzers, which exhibit an electronic counting
dead-time of 400 ns, 10X shorter than the 2400 Series Position
Analyzers and exhibit a maximum practical counting rate of
approximately 1 MHz.
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HOT Type MCP's in place of standard (Option 003/SM)
In some cases, special high bias-current MCP's are used to support the
higher counting rates encountered in applications with Option SH.
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Add 6.4mm Diameter Hole in Center of Sensor (Option
SK)
This option provides a 6.4 mm circular hole directly through the center
of the sensor, including the ceramic baseplate, RAE and MCP's. The
typical purpose of this option is to enable an incident beam to travel
through the sensor, on axis, in applications such as LEED (low-energy
electron diffraction) and related techniques.
Although techniques are utilized to minimize image distortion caused by
the presence of the center hole, some residual distortion in the
immediate vicinity of the center hole (extending to about 4 mm from the
edge of the hole) should be expected. Higher background count rates
than with standard MCP's may also be expected, particularly around the
center hole.
Care must be exercised with this option to avoid allowing any device
inserted into this hole (e.g. electron gun) from physically contacting
the MCP's or RAE.
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Coated MCP Options
CsI, KBr or similar coatings can be applied to input MCP surface to
enhance detection efficiency for soft x-ray and vacuum uv applications.
Specify coating and thickness (1000-3000 Å typical). Contact
factory for price quotation.
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Sealed MCP/RAE Version Sensor Heads for Optical
Single-Photon Imaging
Permanently-vacuum-sealed, UV-visible-NIR sensitive, single
photon-counting imaging detectors are also available. See
2600 Series Imaging Photon Detector System Technical Description.
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Specifications subject to change without notice. Printed in USA
