*mydirectindustry

Catalogs
MICRO-CONTROLE / Spectra-Physics
Oriel Photomultiplier Tubes

Oriel Photomultiplier Tubes

Product catalog summary

Overview: This document provides detailed information on photomultiplier tubes (PMTs) used in spectroscopy instruments, including specifications, operational modes, and housing options. It also includes guidance on selecting the appropriate PMT for specific applications.

Photomultiplier Tubes (PMTs): PMTs are highly sensitive detectors for UV and visible radiation, offering low noise levels. They are available in side-on and end-on configurations, each with distinct advantages and applications.

Side-on Photomultipliers: These are more economical, have faster risetimes, and are suitable for photometry and spectrophotometry. They are compact but have non-uniform sensitivity, except for the model 77360, which offers improved uniformity.

End-on Photomultipliers: These have a larger photocathode area and better uniformity. They can be directly coupled to monochromators without a focusing lens when mounted in specific housings.

Operational Modes: PMTs can operate in pulsed or DC modes, with housing determining the mode. Risetimes and electron transit times vary with bias voltage, affecting response speed and noise levels.

Housing Options: Two types of housings are available for both PMT configurations:

Low Noise DC Operation: 70680 for side-on and 77265 for end-on models, suitable for short pulse measurements.
Long Pulse Operation: 70685 and 70686 housings for longer pulse responses, also functional in DC applications.

Specifications: Detailed specifications for various PMT models are provided, including wavelength range, peak wavelength, photocathode area, maximum bias voltage, and responsivity. The document includes tables and figures illustrating typical responsivity and uniformity of response.

Figures and Tables: The document contains figures showing typical responsivity curves and uniformity of response for side-on and end-on PMTs, as well as dimensional diagrams of PMT housings.

Catalog excerpts

S p e c t r o s c o p y I n s t r u m e n t s 1233 Email: [email protected] • Web: newport.com MONOCHROMATORS AND SPECTROGRAPHS SINGLE CHANNEL DETECTION SYSTEMS MINISPECTROMETERS BENCHTOP SPECTROMETERS AND CCD CAMERAS FT-IR SPECTROMETERS ACCESSORIES FOR SPECTROSCOPY INSTRUMENTS Oriel Photomultiplier Tubes Photomultiplier Tubes in Side-on and End-on PMT Housings. Photomultiplier tubes (PMTs) have very low noise levels and are several orders of magnitude more sensitive than any other detector for UV and visible radiation. We offer PMT models with a full range of spectral sensitivities in both end-on and side-on versions, as well as PMT system components supporting DC, modulated and pulsed measurements. Pulse measurements from nanoseconds to milliseconds are possible at useful photocurrent levels of 100 ìA to 1 mA and above. Which Photomultiplier Tube do I Choose? With all the choices, it can become confusing deciding on the appropriate PMT for your measurement application. Below we describe the options. If you need further help, or want to validate your choice, please call a Sales Engineer for guidance. Side-on Photomultipliers These detectors are more economical than end-on models, have the fastest risetimes and are ideal for photometry and spectrophotometry applications. Their vertical configuration takes up less space than the end-on versions. They mount in the standard or pulsed housings. The main disadvantage of these tubes is their non-uniform sensitivity (refer to Fig. 3). However, the model 77360 Side-on PMT has a good uniformity of response, similar to the end-on tubes. End-on Photomultipliers These detectors have a large photocathode area, and greater uniformity. When mounted in the 70686 Pulsed or 77265 Standard Housings, they couple directly to our 1/8 m or 1/4 m monochromators without the need for a focusing lens. Pulsed or DC Operation All our PMTs can be used in a pulsed mode or DC. The housing determines the operation. Typical risetimes and electron transit times (the delay due to the finite time needed for electrons to transverse the multiplier chain) for all PMTs are listed in the specification table. These times are a function of bias voltage and/or the voltage divider network. They get shorter at higher bias voltages. You need to balance the desire for fast response with the increased noise levels at high biases. Which Housing Do I Choose? We offer two types of housings for both end-on and side-on PMTs. PMT Housings for Low Noise DC Operation For lowest noise DC operation, use the 70680 Housing for sideon tubes or the 77265 Housing for end-on models. These housings are also the best for short pulse measurements (up to 10 ìs long). You can obtain 1 mA level outputs from most of the tubes, in response to short pulses, which will provide easily measurable 50 mV readings when 50 ohm terminations are used. PMT Housings for Long Pulse Operation The 70685 and 70686 Housings allow you to obtain 100 ìA level pulse responses which can also be converted to 50 mV or higher readings with larger load resistors, the nanosecond response times not being critical for longer pulses. These housings also function well in DC applications. • Ultimate low light level detectors • DC or modulated light detection • High responsivity pulsed event detection from ms down to ns • 160 nm to 1100 nm models 77340 77341 77348 77345 77360 RESPONSIVITY (A/W) WAVELENGTH (nm) 200 300 400 500 600 700 800 900 105 104 103 102 Fig. 1 Typical Responsivity of Photomultiplier Tubes at the Bias Supply Voltages listed in the Ordering Information Table. 104 103 RESPONSIVITY (A/W) 102 101 200 400 600 800 1000 WAVELENGTH (nm) 77346 77361 77343 Fig. 2 Typical Responsivity of Photomultiplier Tubes at the Bias Supply Voltages listed in the Ordering Information Table. Models 77343 and 77361 come with a borosilicate glass window which limits their usefulness below 400 nm.

Open the catalog to page 1

1234 Phone: 1-800-222-6440 • Fax: 1-949-253-1680 S p e c t r o s c o p y I n s t r u m e n t s MONOCHROMATORS AND SPECTROGRAPHS BENCHTOP SPECTROMETERS MINISPECTROMETERS SINGLE CHANNEL DETECTION SYSTEMS AND CCD CAMERAS ACCESSORIES FOR FT-IR SPECTROMETERS SPECTROSCOPY INSTRUMENTS 12 0 12 0.0 0.5 1.0 RELATIVE SENSITIVITY (VERTICAL) DISTANCE FROM CENTER (mm) 4 0 4 0.0 0.5 1.0 RELATIVE SENSITIVITY (HORIZONTAL) DISTANCE FROM CENTER (mm) SIDE-ON HORIZONTAL SCAN SIDE-ON VERTICAL SCAN Fig. 3 Uniformity of Response for Side-on and End-on PMTs. END-ON HOUSING 1.4 (36) 1/4-20 TAPPED HOLE 1/4-20 TAPPED HOLE...

Open the catalog to page 2

All MICRO-CONTROLE / Spectra-Physics catalogs and technical brochures

Archived catalogs

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

Brand list