Line Sources Cathodeon

Transcription

1 Line Sources The Ultimate Source

2 LINE SOURCES CONTENTS Mercury vapour lamps Black light blue lamp Germicidal lamp Spectral calibration line sources Line sources

3 Line Sources 1 FEATURES manufactures a high pressure mercury vapour lamp type HPK for use in scientific instrumentation and other applications requiring high stability UV radiation combined with an accurate position for the arc. In contrast to the HG2 low pressure lamp the line output from the high pressure lamp provides maximum energy at 365nm with substantial radiation also at 435, 313, 253 and 404nm. In addition there is a continuum from 200 to 600nm peaking at 260nm with approximately 20% of the maximum energy measured in the line spectrum. Fig 1 HPK 125W Lamp Spectral Irradiance mwm - 2/nm - 300mm Fig 3 Spectral Irradiance Ballast 125w TRMS Current 1150ma TRMS Voltage 127V Band Width 1nm MERCURY VAPOUR LAMPS POWER SUPPLY The Ballast C440 is available to drive the HPK mercury lamp LAMP MOUNTING The lamp should ideally be mounted with the base down and a maximum inclination from the vertical of The lamp can be mounted in a BA15d connector. Due to the high level of UV radiation extreme care should be taken in following the local health and safety precautions for operators working in the presence of ultra violet light. PRODUCT HPK high pressure mercury lamp Ballast ORDERING CODE HPK 125W C440 Fig 2 Dimensions of HPK 125W Lamp 55 max 31.5 max 91 max Wattage 125 Ignition voltage 180V Running Voltage 125V Current 1150mA Stabilisation Time 2 mins Output drop at 1000Hrs 20% APPLICATIONS The HPK lamp is a high output UV source used fo applications such as photochemical processing fluorimetry, mercury analysers, medical and environmental equipment and fixed wavelength detectors.

4 2 Line Sources MERCURY VAPOUR LAMPS FEATURES has developed a compact low pressure, low voltage Mercury vapour lamp, type HG2, principally for use in scientific instrumentation. This lamp has a highly stable output predominantly at the 253.7nm Mercury line. When used with the C430 power supply the line output is much higher than, and the stability comparable to, that of a Deuterium arc lamp. Other lines, which total 20% of the output, are at 313nm, 365nm, 404nm and 435nm. The HG2 lamp has a strike voltage requirement of just 21V and a typical power requirement of 2.7W, making this lamp especially suitable for use in portable instruments. Fig 4 HG2 Lamp Percent Fig 6 Percentage Output Power APPLICATIONS he HG2 lamp can be used for applications such as Mercury Analyzers, Fluorimetry, Pollution Analyzers, LAMP MOUNTING It is advisable that the lamp should be mounted with the base and leads uppermost. Any clamp around the lamp envelope should be at the base end of the lamp. The clamp should be of low thermal capacity and poor thermal conduction. If the mount is such that it cools the lamp significantly Mercury can be condensed in this region, adversely affecting the performance of the lamp. The lamp, which is temperature sensitive, must be protected from draughts if optimum stability is to be achieved. Fig 5 Dimensions of HG2 Lamp DISCHARGE fl Fixed Wavelength Detectors and Calibration Equipment MAX.

5 Line Sources 3 Anode strike voltage Anode running voltage at 150mA Anode current 21V DC max, 18V DC typical 8-14V DC mA, 150mA recommended Filament strike voltage 5-7V DC Filament running voltage 3-4.5V DC Filament running voltage at 150mA anode current 3.5V DC nominal The heater (blue lead) should be positive with respect to the cathode (black lead). Filament strike current 400mA at 6V DC nominal Filament run current 250mA at 3.5V DC nominal Power dissipation at strike 8.7W max Power dissipation during run 2.7W typical Warm up time minutes If lamps are unused for several weeks a burn-in period up to several hours is recommended to reach full specification. Output at lamp surface at 253.7nm With 150mA anode current 15mW/cm2 With 300mA anode current 30mW/cm2 Output at lamp surface at 365nm With 150mA anode current 1.0mW/cm2 With 300mA anode current 2.4mW/cm2 Noise at 253.7nm, 150mA and constant temperature Drift/hour (initial) <5% Lifetime at 150mA Centre of gas discharge position Output viewing angle Temperature 1-2% typical 4000 hours typical 2000 hours minimum 35-39mm above base line 140 cone angle about lamp centre line (highest intensity nearest filament) Envelope optimum C Fluctuation 1 C POWER SUPPLY The Mercury Lamp Power Supply C430 is available for OEM use in board form, for building into original equipment. It has been designed specifically to operate the low pressure Mercury lamp HG2 under optimum conditions. This constant current power supply is intended for scientific use where maximum lamp stability is required. Cathode Heater Supply Anode Supply Stability Anode current Operation Input Requirements Lamp Connections Dimensions Weight PRODUCT Mercury vapour lamp OEM power supply Heater supply constant current 400mA in starting phase 250mA in run phase 150mA constant current Noise and ripple better than 0.2% Long term drift better than 1% At switch on the heaters are run at 400mA constant current. This gives a soft start to the heaters and so prolongs the lamp life. After a short delay the lamp strikes and anode current flows in the heater return. This has the effect of dropping the heater current supplied to 250mA. Feedback between anode and heater supplies acts to further stabilize the lamp output. 110, 130, 220, 240V ±10% rms 50/60Hz Board connections via Molex 0.156" KK plugs 150mm x 76mm x 50mm (max) 600g (max) ORDERING CODE HG2 C430 B2 MERCURY VAPOUR LAMPS

6 4 Line Sources BLACK LIGHT BLUE LAMP FEATURES manufactures the TW6W black light blue fluorescent lamp that emits ultra violet radiation in the nm range. Fig 7 Black Light Blue Lamp Lamp voltage 220V Lamp current 27mA Output 50mW Average life 2500hrs Fig 10 Polar Power Distribution (at 50cm) 0ß 180ß 30ß 1 150ß 2 uw/cm 2UV 60ß 90ß 120ß The bulb is manufactured of a dark blue glass which cuts off any visible radiation whilst remaining transparent to the ultra violet. POWER SUPPLY The TW6W black light blue lamps run on 220V mains voltage and therefore no power supply or ballast is required. LAMP MOUNTING The lamp is fitted with an E27 screw base and can be operated in any orientation. The ability to run the lamp directly from mains voltage enables the product to be used in applications where space is at a premium. PRODUCT Black light blue lamp ORDERING CODE TW6W Fig 8 Black Light Blue Lamp Dimensions max. 28 APPLICATIONS he spectral characteristics max of the lamp allows the excitation of luminescence which can reveal fluorescence and phosphorescence of tamps, dark room paints, extiles, bank notes, papers and in the geological investigation of stones and rocks. Spectral Irradiance mwm 2/nm 300mm Fig 9 Spectral Irradiance Mains 230v Band Width 1nm

7 Line Sources 5 FEATURES manufactures the TUV6WE germicidal lamp, a low pressure mercury vapour device emitting UV radiation primarily at 254nm. Fig 11 Germicidal Lamp Lamp Voltage 220V Lamp Current 27mA Intensity (at 1 M) 0.85uW/cm2 Output 120mw Reduction in output over time between100 and 2500 hours 25% Average life 2500 hrs GERMICIDA LAMP POWER SUPPLY The TUV6WE germicidal lamp operates on 220V mains voltage and therefore no power supply or ballast is required. LAMP MOUNTING The lamp is fitted with an E27 screw base and can be operated in any orientation. PRODUCT Germicidal lamp ORDERING CODE TUV 6WE Fig 12 Germicidal Lamp Dimensions max max Spectral Irradiance mwm 2/nm 300mm Fig 13 Spectral Irradiance Mains 230V Band Width 1nm APPLICATIONS The primary use of the TUV6WE lamp is for sterilization of small compartments where the compact size and direct mains operation are of particular advantage.

8 6 Line Sources SPECTRAL CALIBRATION LINE SOURCES FEATURES These cool, compact and easy to operate sources provide isolated spectral line outputs for precise optical wavelength calibration in the ultraviolet, visible and near infrared regions of the spectrum. Also available is a dedicated power supply, the C100, which is easy to operate and ensures stable long life lamp operation. A series of six electrodeless gas discharge lamps provide well over 100 discrete wavelengths in the range 178nm to 843nm. Their low temperature, low pressure operation gives highly stable output spectra at wavelengths which are physical constants for the particular element employed. For safety and convenience, lamps are used complete with a C150 lamp holder, easily interchangeable via a plug and socket on the rear of the power supply. Alternatively it takes but a few moments to unscrew the holder and change the lamp. POWER SUPPLY The C100 power supply has been designed to offer safe, reliable and convenient operation of the C150 Calibration Line Sources by providing correct starting and operating conditions for all lamps in the range in a single unit. It is simple to operate since the only control is a single on/off switch and lamps are easily and safely connected by a plug and socket, enabling quick changeover of the alternative sources in the range. The spectral line source will operate on either V or V AC, 50/60Hz. Fig 15 C100 Power Supply With Lamp Holder and Lamp Fig 14 Dimensions of Lamp Holder and Lamp Input Output V Output I Output Connector Dimensions Weight Switch selectable V/ V AC 50/60Hz 3.2KV peak to peak 180KHz 300mA peak to peak 90 leading PET 100 series 50ohm 190mm x 190mm x 108mm high 2.35Kg APPLICATIONS hese sources may be used directly as wavelength calibration references for a variety of equipment Lamp envelope Standard lamp fill Non standard lamp fill Lamp holder construction Quartz Mercury, Neon, Argon, Xenon, Krypton, Mercury/Iodine. Lamp fill to customer specification can be supplied. Bright steel base and cable entry. Black anodized Aluminium lamp cover. OEM VERSION The Line Source Power Supply C100 is available for OEM use in board form, for building into original equipment. The package is available as follows: C100B2 - Printed circuit board, output transistors on heatsink and mains transformer. DIMENSIONS Circuit board Heatsink Transformer 115mm x 121mm x 80mm high 102mm x 32mm x 70mm high 69mm x 56mm x 59mm high perating in the ultraviolet, visible and near infrared regions of the spectrum. WEIGHTS Circuit board Heatsink Transformer 360g 150g 675g

9 Line Sources 7 The wavelength graphs below indicate major transitions only. Many other lines, characteristics of a particular gas fill, may be detected dependent on the sensitivity and resolution of the detecting system. Fig 16 Mercury Fig 17 Mercury/Iodine SPECTRAL CALIBRATION LINE SOURCES ; Fig 18 Neon Fig 20 Xenon ; ; Fig 19 Argon Fig 21 Krypton ORDERING CODE PRODUCT ORDERING CODE PRODUCT C150 Lamp holder, lead and C100 Power Supply plug without lamp C150/Xe } C155/Xe } C150/Ne } C155/Ne } C150/Ar }Lamp holder, lead and C155/Ar } Replacement C150/Kr }plug complete with specified lamp C155/Kr } Lamp C150/Hg/I } C155/Hg/I } C150/Hg } C155/Hg }

10 8 Line Sources LINE SOURCES FEATURES manufactures a range of sources which each emit a number of monochromatic lines of known wavelength. The lamps contain a discharge tube filled with a very pure gas, metallic vapour or a combination of the two and an arc is struck between electrodes that permit a very high current density. A suitable gas is the rare gas Helium which primarily gives output in the visible region. Alkali metals such as Sodium can be added to the gas filled discharge tube, the metal being vaporised by the heat of the discharge. The discharge tube is surrounded by a cylindrical outer bulb which may be of quartz for those applications where the ultra violet radiation below 250nm is important. Fig 22 Line Source Lamp MERCURY LAMPS A line source filled with mercury is available in a low pressure version, the low pressure lamp emits the normally expected line spectrum. Spectral Irradiance mwm 2/nm 300mm Spectral Irradiance mwm 2/nm 300mm Auto Leak Transformer TRMS Current 912mA TRMS Voltage 83.0V Band Width 1nm Auto Leak Transformer TRMS Current 933mA TRMS Voltage 12.8V Band Width 1nm Fig 24 Spectral Irradiance - He Fig 25 Spectral Irradiance - Na Fig 23 Spectral Irradiance - Low Pressure Hg APPLICATIONS These lamps are useful as illumination or calibration sources in a wide range of Spectral Irradiance mwm 2/nm 300mm Auto Leak Transformer TRMS Current 940mA TRMS Voltage 13.0V Band Width 1nm biological and chemical esearch where visible and ultra violet radiation is necessary. They are dditionally used in specific techniques such as nterferometry Polarimetry Refractometry and Spectroscopy.

11 Line Sources 9 LAMP MOUNTING While most often run vertically for convenience the line sources may be operated in any orientation. All the lamps have identical electrical and geometrical characteristics including the light centre position, the arc length varying from 25mm to 38mm dependent on the type of lamp. This uniformity ensures that the differing lamps are speedily interchangeable permitting experimentation over a wide spectral band using several lamps. Fig 26 Line Source Lamp Dimensions 30 SPECTRAL DATA Measurements were made of spectral irradiance in units of mw/m -2 nm -1 at a distance of 300mm from the horizontal centre of each lamp. The height of each lamp was adjusted so that the vertical centre of the emitting area was coincident with the optical axis of measurement. The measurement equipment consisted of a spectroradiometer based on a Bentham DM 150 double monochromator. The wavelength accuracy of the spectroradiometer was checked before measurements commenced and found to be within plus or minus 0.25nm over the range used. Measurements were made at 1nm intervals with 1nm bandwidth over the range 200nm to 700nm. In each case the specified warm up time was observed. LINE SOURCES A GAS/VAPOUR ENVELOPE WATTAGE ARC LENGTH CURRENT WEIGHT Hg (low pressure) glass mA 60g He glass mA 60g Na glass mA 60g PRODUCT Gas/Vapour Hg (low pressure) He Na ORDERING CODE POWER SUPPLY The auto leak transformer C800 can be supplied in both 230v and 110v forms to drive any of the complete range of line sources. DESCRIPTION Auto Leak Transformer for 220V Auto Leak Transformer for 110V PART NO. C800 C811

12 The Company Ltd is based in the university city of Cambridge, England, and is the world s leading Specialist in Spectral Source Technology. Its experience in the design and manufacture of vacuum/gas filled electronic components spans over 60 years of changing technology since the company was founded in the mid 1930 s. A programme of active fundamental research to improve noise, intensity and lifetime performance, with continuing light source, electronic and mechanical engineering support, enable lamps to meet the most stringent requirements of modern instrumentation and are increasingly the first choice of major instrument manufacturers throughout the world. The Products is continuously improving and extending its range of specialist light sources used by the scientific and professional community. Detailed literature, application notes and technical data are available describing all products in the current range of: Deuterium Lamps Xenon Lamps Vacuum Ultra Violet Lamps Calibration Lamps Filament supports for Mass Spectrometry Tungsten Halogen Lamps Hollow Cathode Lamps Mercury Lamps Pulsed Deuterium Lamps See Through Hollow Cathode Lamps Photoionisation Lamps Line Sources Quality is committed to customer satisfaction at all levels. The application of Total Quality Manufacturing (TQM) control and rigorous instrument testing, combined with prealignment of lamps, custom packaging and our proven Just-in-time (JIT) delivery procedures, help sustain long term business relationships on all continents. ISO 9002 CERTIFIED World-Wide Distribution products are available to discerning scientists through an authorised network of over 80 dealers covering more than 50 countries around the world. In addition to major distributors many other dealers also carry extensive stocks to ensure rapid delivery to the end user. However, if any difficulties are experienced in the supply of products, or for any OEM enquiries, please contact us at our office in Cambridge. For OEM and in the UK Ltd Nuffield Road, Cambridge CB4 1TW Telephone: (01223) Fax: (01223) International Telephone: Fax: postmaster@cathodeon.com website: Available Locally from: