Quantar Technology Incorporated
2620A Mission Street,Santa Cruz, CA 95060-5703
Tel: 831-429-5227, FAX: 831-429-5131
www.quantar.com
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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   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.
   
   
Option 001/SE: Add electrically isolated front ring
   
   
Option 002/SH: Install RAE encoder compatible with 2500 Series Position Analyzers in place of standard
   
   
Option 003/SM: High bias current (HOT) MCP's in place of standard MCP's; normally ordered with Opt 002/SH.
   
   

25 MM Sensors Heads

Model 3390A   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.
   
   
Option 001/SE: Add electrically isolated front ring
   
   
Option 002/SH: Install RAE encoder compatible with 2500 Series Position Analyzers in place of standard
   
   
Option 003/SM: High bias current (HOT) MCP's in place of standard MCP's; normally ordered with Opt 002/SH.
   

Model 3391A   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).
   
   
Option 001/SE: Add electrically isolated front ring
   
   

40 MM Sensors Heads

Model 3394A   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.
   
   
Option 001/SE: Add electrically isolated front ring
   
   
Option 002/SH: Install RAE encoder compatible with 2500 Series Position Analyzers in place of standard
   
   
Option 003/SM: High bias current (HOT) MCP's in place of standard MCP's; normally ordered with Opt 002/SH.
   
   
Option SK: 6.4 mm ID center hole in detector. Consult factory.
   

Model 3395A   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.
   
   
Option 001/SE: Add electrically isolated front ring
   
   

75 MM Sensor Heads

Model 3392A   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.
   
   
Option 001/SE: Add electrically isolated front ring
   
   
Option 002/SH: Install RAE encoder compatible with 2500 Series Position Analyzers in place of standard
   
   
Option 003/SM: High bias current (HOT) MCP's in place of standard MCP's; normally ordered with Opt 002/SH.
   
   
Option SK: 6.4 mm ID center hole in detector. Consult factory.
   
   

80 x 100 MM Rectangular Sensor Heads

Model 3398A   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).
   
   
Option 001/SE: Add electrically isolated front ring
   
   
Option 002/SH: Install RAE encoder compatible with 2500 Series Position Analyzers in place of standard
   
   
Option 003/SM: High bias current (HOT) MCP's in place of standard MCP's; normally ordered with Opt 002/SH.
   
   
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   Replacement 25 MM Microchannel Plate (MCP)*    
Model 11020A/SM   Replacement HOT-type 25 MM Microchannel Plate (MCP)*    
Model 11021A   Replacement 40 MM Microchannel Plate (MCP)*    
Model 11021A/SM   Replacement HOT-type 40 MM Microchannel Plate (MCP)*    
*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.


Special Notes:

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.

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.

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.

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.

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.

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.

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.


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