L7292

L2D2 HAMAMATSU | Alldatasheet

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The best light source is supported by the best electrode technology. DEUTERIUM LAMPS L2D2LAMPS

LONG LIFE : 4000 HOURS 4 times longer guaranteed life I Life Characteristics TIME(hours) LIGHT INTENSITY (%) 4000 3000 2000 1000 0 0 10050 HIGH LIGHT OUTPUT :1.3 TIMES HIGHER 1.1 times higher (L2-4000 series) I Radiant Output Intensity L2D2LAMP L2-2000 SERIES1.3 TIMES HIGHER (L2-2000 Series) HIGH STABILITY : 2TIMES STABLE Fluctuation: 0.05 %p-p, Drift:±0.3 %/h TIME (30 s/div.) I Light Output Stability TLSOB0051EA 1×10-5AU L2D2 LAMPS CONVENTIONAL LAMPS EXCELLENT TEMPERATURE CHARACTERISTICS LESS MOVEMENT OF ARC EMISSION POINT SMALL INTENSITY VARIATIONS : 1/2 Compared to our conventional lamps I Intensity Variation TLSOB0053EA TLSOF0138 TLSOB0052EA HPLC Atomic Absorption Spectrophotometers Thin Layer Chromatography UV-VIS Spectrophotometers CE(Capillary Electrophoresis) SOx/NOx Analyzers Film Thickness Measurement

APPLICATIONS

L2D2 Lamps (Deuterium Lamps ) The L2-4000 series lamps assure an operating life of 4000 hours-4 times longer than conventional lamps. This is the longest operat- ing life of any deuterium lamp. The L2-2000 series lamps produce 1.3 times higher light output than conven- tional lamps. The L2-4000 series lamps even offer light output 1. 1 times higher than conventional lamps. By using a newly devel- oped ceramic structure, a uniform and optimum tem- perature distribution, which are the most important factor for stable operation, can be obtained. This results in fluctuations of only 0.05 %p-p in the light output, as well as a re- duced drift of only ±0.3 %/h. Use of a ceramic structure with excellent thermal stability ensures stable lamp operation even in the presence of ambient temperature variations. The spacing between elec- trodes is kept fixed by a molded ceramic spacer. This reduces the lamp to lamp variations in the light output to one half of that obtained with our lamps having a conventional all metal structure. Since the ceramic structure has a small thermal expansion coefficient, there is virtually no move- ment of the arc emission point during operation. TLSOB0050EA WAVELENGTH (nm) 190 RELATIVE INTENSITY(A.U.) 0.5 1.5 2.5 3.5 210230250270290310330350370390 L2D2 LAMPS CONVENTIONAL LAMPS L2-2000SERIESL2D2 LAMP L2D2 LAMPL2-4000SERIES CONVENTIONALTYPE CONVENTIONALTYPE WAVELENGTH(nm) LIGHT INTENSITY (A.U.) 390 370 350 330 310 0 1 2 3 4 290 270 250 230 210 190

3.0 V/0 V to 1 V

2.5 V/1.7 V 10 V/2.5 V to 6.0 V 10 V/7.0 V

12 V to 15 V/0 V

2.5 V/1.0 V 2.5 V/1.0 V 2.5 V/1.0 V 2.5 V/1.7 V L2-2000 L2-2000 L2-4000 See-through 30W PowerConsumptionTypeSeriesCathode Rating GENERAL PURPOSE SEE-THROUGH TYPE BA trigger voltage higher than this value is required to start lamp discharge. For reliable lighting, an application of 500 V to 600 V is recommended. The maximum rated voltage that can be applied is 650 V. CThe heater current during warming-up period is so high that the enough voltage may not be supplied to the lamp in case the cable between the lamp and the power supply is long because of voltage drop at the cable. The power supply for the heater should be designed so as to supply specified voltage at the lamp terminal. DThe lamp life end is defined as the point when the light output falls to 50 % of its initial value or when output fluctuation (p-p) exceeds 0.05 %. EL2D2 lamp does not always have a direct replacement for conventional type from its dimensional outline point of view. Please refer to page 5 and 6. Please consult with our sales offices for further details. An Example for optics of See-through type The see-through type electrode structure enables straight-line arrangement of the halogen lamp, deuterium lamp, optical system and optical passage. This simplifies optical design of UV-VIS spectrophotometer etc., and eliminates loss of light amount caused by the half mirror. SEE-THROUGH TYPE L2D2 Lamps (Deuterium Lamps ) FRecommended operating voltage is 3.5 V ± 0.5 V. GIn these lamps, discharge current is allowed to flow into the filament during operation so that cathode temperature is maintained at an optimum level. So there is no need for input of external power to keep the filament heated. HAverage operating life : Operating life depends on environmental conditions (vacuum atmosphere). It is recommended that these lamps be used in an oil-free environment. *We recommend using Hamamatsu deuterium lamp power supplies in order to obtain the full performance from our lamps (Refer to page 7 and 9). TOP VIEW LENS HALOGEN LAMP SEE-THROUGH L2D2 LAMPTLSOC0011EF 40˚ q w q q y r r w w e e y i y e e t o t o u u r r r Tube Drop Voltage Typ. (V dc) Anode Current (mA dc) Spectral Disiribution (nm) Window Material Dimen- sional outline Aperture Diameter (mm) Required Dis- charge Starting Voltage Min. (V dc) Series L2-4000 L2-2000 Synthetic silica 1.0 350 1.0 350 1.080 350 1.0350 0.5 400 0.5 400 1.0 350 0.5 400 1.0350 0.5 400 0.5 400 1.0 350 0.5 400 1.0 350 0.5 400 1.0 350 300±30 300±30 0.5 400 1.0 350 1.0 350 0.5 400 1.0 350 1.0 350 UV glass Synthetic silica UV glass 185 to 400 UV glass185 to 400 160 to 400 185 to 400 185 to 400 160 to 400 UV glass UV glass 185 to 400 UV glass 185 to 400 UV glass 185 to 400 MgF 2115 to 400 Type. No. L2-200080 300±30 1.0 350 1.0 350 1.0 350 0.5 400 0.5 400 UV glass185 to 400 L6999 L7307 L6999-50 L7174 L7306 L6565 L6566 L6301 L6302 L7298 L6303 L6304 L6305 L6306 L6307 L6308 L7296 L7295 L6309 L6310 L6311 L6312 L7293 L7292 L6999 L7307 L7174 L7306 Fluctuation (p-p) Max. (%) Drift Max. (%/ h) Output Stability ±0.3 ±0.3 0.05 0.05 ±0.30.05 Current Typ. (A dc, ac) Voltage (V dc, ac) Time Min. (s) Filament Ratings Warm-up 12 to 150.5 to 0.55 10±1 2.5±0.25 0.8 1.2 10±1 0.8 10±1 3.0±0.3 3.0±0.3 2.5±0.25 2.5±0.25 20 4 2.5±0.25 Conventional Lamps Guaranteed Life (h) Current Typ. (A dc) Voltage (V dc) Operating 2.5 to 6.0 1.0±0.1 0.3 to 0.6 1.82000 L613,L613-04 L3382-01 L613,L613-04 L1636 L1729 L3381-01 L3382-01 2.5 to 6.0 0 to 1 0 to 1 1.0±0.1 0 to1.8 0 to1.8 0.3 to 0.6 1.8 2000 4000 L591 L2196 L7296-50 — L1626 3.3 1.8 7.0±0.5 1.7±0.2 1.0±0.1 L2541 L2526 L4505 L4505-50 L4510 L4510-50 L879-01 L879 Type. No. Fluctuation (p-p) Max. (%) Drift Max. (%/ h) Output Stability Current Max. (A dc, ac) Voltage (V dc, ac) Time Min. (s) Filament Ratings Warm-up Conventional Lamps Guaranteed Life (h) Current Max. (A dc) Voltage (V dc) OperatingType. No. L6999-50 — L1887 L1886 2000 1.8 3.3 1.0±0.1 1.7±0.2 L6311-50 L6312-50 L6565 L6566 L6301 L6302 L7298 L6303 L6304 L6305 L6306 L6307 L6308 L7296 L7296-50 L7295 L6309 L6310 L6311 L6312 L7293 L7292 L6311-50 L6312-50 Tube Drop Voltage Typ. (V dc) Anode Current (mA dc) Spectral Disiribution (nm) Window Material Dimen- sional outline Aperture Diameter (mm) Required Dis- charge Starting Voltage Min. (V dc) SeriesType. No. D C E F G DE F H G SELECTION GUIDE SPECIFICATIONS FOR L2D2 LAMPS SPECIFICATIONS

y L7295, L7296, L7298 u L7292, L7293i L7296-50 !0 L6999-50, L7174Cross section of see-through type o L6311-50, L6312-50 TLSOA0051EATLSOA0052EA TLSOC0010EA TLSOA0011ECTLSOA0075EA TLSOA0050EA APERTURE ANODE CATHODE CERAMIC ELECTRODE (REAR PIECE) CERAMIC ELECTRODE (CENTER PIECE) LIGHT OUTPUT 0.5 or 1.0 1.0 0.5 40° 6±1 42±2 68±2160±5 ARC POINT CONNECTION FILAMENT FILAMENT · GND ANODE : BLUE : BLACK : RED TLSOA0017ED 14±1 15.0±0.5 30±1 LIGHT OUTPUT 2- 3.3 22.0±0.1 37.0±0.1 52.0±0.5 +0.038 3+0.020 +0.038 23.0±0.05 5.0±0.5 60±2160±5 6±1 30±1 ARC POINT ARC POINT CONNECTION FILAMENT FILAMENT • GND ANODE : BLUE : BLACK : RED 6±1 42±2 68±2120±5 ARC POINT 50±1 15.0±0.5 30±1 FILAMENT : BLUE FILAMENT.GND : BLACK ANODE : RED FILAMENT : BLUE FILAMENT : BLUE ANODE : RED CONNECTION L7293 L7292 ARC POINT SCREW PORTION 1VACUUM SIDE FLANGE 2TIGHTENING SXREW 3STORRER 4ORING (JIS B2401) CALL No. V15 15 mm I.D. 4 mm WIDTH 5SPACER aMgF

2 WINDOW

a b L7292, L7293 mounting example on the vacuum system LIGHT OUTPUT 2- 3.3 22.0±0.122.0±0.1 3+0.05 28±1 ARC POINTARC POINT 50±1 35.0-0.1 CONNECTION FILAMENT FILAMENT ANODE : BLUE : BLUE : RED +0.15 22.0-0.1 68±2 37.0±0.1 120±5 6±1 -0.05 LIGHT OUTPUT 2- 3.3 22.0±0.122.0±0.1 15±0.5 3+0.05 30±1 ARC POINT 50±1 35.0-0.1 CONNECTION FILAMENT FILAMENT ANODE : BLUE : BLUE : RED +0.15 22.0-0.1 68±2 42.0±0.1 160±5 6±1 -0.05 14±1 q L6301, L6302, L6565w L6305, L6306, L6566 L6303, L6304, L6999 L7306, L7307 e L6307, L6308, L6309, L6310 t L6311, L6312 r (Unit : mm) 6±1 42±2 68±2160±5 28±1 ARC POINT TLSOA0020EC L2D2 Lamps (Deuterium Lamps ) TLSOA0040EB 30±1 6±1 42±2 80±2200±5 TLSOA0041EC ARC POINT 30±1 6±1 42±2 68±2160±5 ARC POINT TLSOA0018ED 30±1 6±1 42±2 60±2160±5 ARC POINT CONNECTION FILAMENT FILAMENT • GND ANODE TLSOA0039ED : BLUE : BLACK : RED CONNECTION FILAMENT FILAMENT ANODE : BLUE : BLUE : RED CONNECTION FILAMENT FILAMENT ANODE : BLUE : BLUE : RED FILAMENT : BLUE FILAMENT · GND : BLACK ANODE : RED FILAMENT : BLUE FILAMENT : BLUE ANODE : RED CONNECTION 28±1 6±1 42±2 68±2120±5 ARC POINT L6999/L7307 L6303/L6304/L7306 FILAMENT : BLUE FILAMENT.GND : BLACK ANODE : RED CONNECTION

Extremely high stability of intensity is required for deuterium lamps because of their applications. Therefore, use of a power supply designed to drive the lamps with stable operation is recommended. Hamamatsu,s power supply for deuterium lamps uses a constant-current circuit in the main power supply section and a constant-voltage circuit in the filament power supply section to assure a reliable operation. Hamamatsu offers not only OEM power supplies specially designed for your applications, as well as the following types according to the operation mode of various lamps. SPECIFICATIONS L2D2 Lamps (Deuterium Lamps ) TECHNICAL INFORMATION The following 4 types of window material are available for deuterium lamps. (1) UV glass (2) Synthetic silica (3) MgF Figure 2 shows the transmittance of various window materials. UV light at wavelengths shorter than 190 nm attenuates greatly due to its absorption by oxygen. To obtain the fullest performance in window trans- mittance, it is recommended that the inside of the equipment be filled with nitrogen or vacuum-evacuated to eliminate this absorption effect. The non-projecting type uses the side of the cylindrical glass bulb as the emission window, whilst the projecting type uses a plane glass attached to a projection on the bulb. The projecting type has a uniformed transmittance due to the plane glass. Since the window is located far from the discharge position, the amount of dirt produced by spattering from the electrodes is reduced resulting in low deterioration of light output. The non-projecting type requires less space and has a wider directivity since there is no projection, enabling effective use of emitted light. The long-nose projecting type uses an MgF 2 window and is suitable for vacuum ultraviolet applications. This type is used with the tip of the nose inserted into the vacuum equipment. Spectral Distribution Window Material Figure 1: Spectral Distribution Figure 2: Typical Transmittance of Various Window Materials GUV glass GSynthetic silica GMgF2 TLSOB0024ED Light Distribution Deuterium lamps emit high intensity light in the UV range at wavelengths shorter than 400 nm. Light intensity on the short wavelength side is deter- mined by the window material used. UV glass has a higher ultraviolet transmittance than normal optical glass (borosilicate glass). It has the longest cut off wavelength of 185 nm among the four types. However the generation of ozone is lower than other wind- ow material types, it is not necessary to have special anti-ozone treat- ments. Synthetic silica is obtained by fusing a silica crystal that is artificially grown. Although its cut off wavelength is 160 nm, it contains less impuri- ties than fused silica, and transmittance at 200 nm has been improved by approx. 50 %. MgF 2 is a crystallized form of alkali metal halide that has an excellent ultraviolet transmittance, a low deliquescence and is used as window material for vacuum ultraviolet applications. Its cut off wavelength is 115 nm. Figure 3: External View Figure 4: Directivity (Light Distribution) Non-projecting type Projecting typeLong-nose projecting type Non-projecting type Projecting type 30° 15° 15° 30° TLSOB0021EA 30° 15° 15° 30° TLSOB0020EA TLSOB0077EA Long-nose Projecting type TLSOF0139 Figure 5: Arc Distribution Arc Distribution 0.5 mmAPERTURE APERTURE: 0.5 mm 1.0 mmAPERTURE YX YX INTENSITY INTENSITY (High Brightness Version)(Standard Version) APERTURE: 1.0 mm TLSOB0049EB Arc intensity is determined by the aperture (light exit) size. Figure 5 shows typical spectral distributions for lamps with different aperture sizes. At the same input current and voltage, lamps with an aperture of 0.5 mm diameter (high brightness type) provide 1.6 times higher brightness than lamps with an aperture of 1.0 mm diameter (standard type). The half width of spectral distribution also becomes narrower with a reduced aper- ture size. When higher intensity is required or the object to be irradiated is very small, the high brightness type is recommended. HEATER VOLTAGE AND CURRENT 160 200 240 280 320 360 400 WAVELENGTH (nm) RADIANT INTENSITY (µW/cm2 •nm at 30 cm) 0.5 0.1 0.05 0.01 UV GLASS SYNTHETIC SILICA (PROJECTING TYPE, 1 mm THICK) 200 250 300 350150 100 WAVELENGTH (nm) 100 TRANSMITTANCE (%) UV GLASS SYNTHETIC SILICA MgF2 30° 10° 20° 10° 20° 30° C1518 TLSOF0068TLSOF0150TLSOF0150 C7860M7628 POWER SUPPLY Control Methode Input Output Ambient Temperature Cooling Dimensions (W × H × D) Weight Certification C1518 (2.5 V) C1518 (10 V) C1518 (SQ2.5 V) C1518 (SQ10 V) C7860/M7628-2510 C7860/M7628-2517 A C7860/M7628-3000 A C7860/M7628-1035 A C7860/M7628-1070 C7860/M7628-1555 A NOTEA C7860 series are manufactured only when the order is placed. * Characteristics are measured at 23±1 °C after 30 min of warming up. 2.5 ± 0.2 10 ± 1 2.5 ± 0.2 10 ± 1 2.5 ± 0.15 2.5 ± 0.15 3 ± 0.15 10 ± 0.5 10 ± 0.5 15 ± 0.75 L6565, L7293, L6999, L6999-50 L7307, L7174, L6301, L6302 L6307, L6308, L7292 L7298, L6303, L6304, L7306 L7296, L7295, L6309, L6310, L7296-50 L6565, L7293, L6999, L6999-50 L7307, L7174, L6301, L6302 L7298, L6303, L6304, L7306 L6566, L6305, L6306 L6307, L6308, L7292 L7296, L7295, L6309, L6310, L7296-50 L6311, L6311-50, L6312, L6312-50 Input Voltage Input Wattage Output Voltage Output Current Trigger Voltage Fluctuation (p-p) Drift Output Voltage Output Current Warm-up Time Dropper Type 100 (DC) 80 (DC) 160 300 600 ± 50 0.1 ±0.1 See below See below 0 to +40 Not required 200 × 107 × 240 6.7 Switching Type (DC) 24 ± 2.4 (DC) 80 (DC) 160 300 600 ± 50 0.5 ±0.1 See below See below 0 to +40

20 CMF of forced air

100 × 118 × 36.2 0.17 UL/CE V VA Max. V Typ. V Typ. mA V peak % Max. %/h Max. s Typ. mm kg Switching Type (AC) 90 to 115/180 to 250 (Automatic) (DC) 80 (DC) 160 300 600 ± 50 0.5 ±0.1 See below See below 0 to +40 Not required 113 × 122 × 220 2.7 With Load Without Load Anode Heater Parameter Type No.Warm-up Voltage (V dc) 0.8 1.2 0.8 1.2 0.5 Current (A dc typ.) 1.0 ± 0.1 3.5 ± 0.5 1.7 ± 0.2 7.0 ± 0.5 1 ± 0.05 1.7 ± 0.1 3.5 ± 0.2 7 ± 0.35 5.5 ± 0.3 OperationApplicable Lamps Voltage (V dc) 1.8 0.3 3.3 1.8 3.3 0.3 0.3 Current (A dc typ.) C1518 C7860 M7628 Unit

Figure 6 shows the external view and internal construction of a deuterium lamp. The anode has a unique structure covered with ceramic to prevent abnormal discharge, and the cathode has a highly durable electrode. Since a deuterium lamp uses the positive column flash of arc discharge, the cathode is shifted sideways and an aperture is located immediately in front of the anode so that high intensity is obtained. The aperture plate placed between anode and cathode may be used as an auxiliary elec- trode for lamps designed for low voltage lighting. 1Solarization 4Life 3Output stability 2Discharge starting voltage Transmittance of UV glass and fused silica drops when they are used over a long period. This is caused by a drop in transparency of the glass resulting from dirt on the glass and the influences of ultraviolet rays. In the worst case, the glass becomes cloudy and its life is short- ened. This is called solarization, and transmittance drops, particularly in short wavelength region. This phenomenon is hardly ever seen with synthetic silica. When the cathode is sufficiently heated and ready for arc discharge, a pulse trigger voltage is applied between anode and cathode, and dis- charge starts. The discharge starting voltage of 30 W deuterium lamps is approx. 350 V (400 V max.). However, since the discharge starting voltage rises according to the prolongation of operation time, it is rec- ommended that a voltage of approx. 500 V be applied to assure dis- charge. (The maximum applied voltage for trigger is 650 V.) The dis- charge starting voltage varies depending on the trigger method and trigger constant. (1) Drift Drift refers to variation of output over a long period caused as a result of the change in thermoelectron discharge characteristic of the cathode, change in gas pressure or dirt on the window. It is expressed in variation per hour. In the case of deuterium lamps, it takes 10 to 15 minutes until the inside of the lamp reaches thermal equilibrium after start of discharge, so a warm-up period of 20 to 30 minutes is required. (2) Fluctuation Fluctuation refers to variation of output caused by deterioration of the cathode or fluctuation of discharge position. Light output fluc- tuates approx. 0.05 % at intervals between a few minutes and a few hours. In addition, the position of the arc point also fluctuates. (1)Fluctuation of light output Life is determined by the point at which fluctuation combining fluctuation and shift exceeds 0.05 %p-p. (2)Drop of light output Life is determined by the point at which the total emitted energy drops to 50 % of the initial level. As described earlier, decrease in light output is caused mainly by solarization and dirt inside the window. The life specified is 2000 hours for L2-2000 series, and 4000 hours for L2-4000 series. L2D2 Lamps (Deuterium Lamps ) OPERATING TEMPERATUREPRECAUTION AND WARRANTY Table1: Allowable Operating Temperature Range for Deuterium Lamps Lamp Type +290 °C Max. +245 °C to +280 °C +10 °C to +50 °C L2D2 Lamp Cathode TypeAll Cathode type Ambient temperature: Ta Bulb wall temperature: Tb Maximum allowable bulb wall temperature: Tb Max. *Temperature enclosed by ( ) indicates the optimum ambient temperature. Warranty Optimum Operating Temperature As the ambient temperature (Ta) rises, cathode tem- perature increases, resulting in evaporation of the cathode. If the ambient temperature (Ta) drops, the gas pressure inside the bulb is reduced increasing the kinetic energy of the gas and ions causing sputtering of the cathodes thermionic coating. In both cases, the gas inside the bulb is rapidly consumed. This deterio- rates the stability and intensity. Thereby drastically shortening the operating life. For stable operation of deuterium lamps, care should be paid to the installation of the lamps so that the bulb wall temperature (Tb) does not exceed +290 °C. Precautions When Using Deuterium Lamps To obtain high stability and long operating life, ade- quate care must be paid to operating conditions includ- ing the operating temperature of the lamp. Although the lamp,s bulb wall temperature (Tb) rises as the ambient temperature (Ta) rises, the bulb wall temperature of conventional deuterium lamps normal- ly rises to approx. +200 °C (direct-heated cathode type) to 240 °C (SQ cathode type) when the ambient temperature is +25 °C. Moreover, the bulb wall tem- perature of the L2D2 lamps rises even further by +50 °C reaching +280 °C due to the way in which the elec- trode is constructed. (Bulb wall temperature (Tb) also differs depending on the lamp type and heater voltage as well as lamp housing.) Although the operating tem- perature of Hamamatsu L2D2 lamps has been designed based on lamps operated under normal tem- perature, the temperature range given in the table below is recommended as the allowable operating temperature range enabling the use of the lamps over a long period of time with high stability. Deuterium lamps emit ultraviolet rays which can be harmful to your eyes and skin. Never look directly at the emitted lights, nor should you allow it to come into contact with your skin. Always wear protective goggles and clothing when operating the lamps. Since the bulb wall reaches a very high tempera- ture (over +200 °C) when the lamp is on, do not touch it with bare hands or bring flammable objects near it. Do not exert mechanical vibration or shock on the lamp, otherwise the stability will deteriorate. Silica glass graded sealing. In the case of bulbs using silica glass, the window is formed by connecting different glass sections hav- ing slightly different expansion rates. Since the mechanical strength of these seams is low, the bulb fixing method should be so arranged that no force is exerted on these seams during fixing or opera- tion. Before turning on the lamp, wipe the bulb and win- dow gently with alcohol or acetone. Dirt on the win- dow will cause deterioration of the UV transmission, so always wear gloves when handling the lamp. High voltage is used to operate the lamp. Use extreme caution to prevent electric shocks. The warranty period will be one year after our ship- ment to original purchaser or guaranteed life time whichever comes first. The warranty is limited to replacement of the faulty lamp. Faults resulting from natural disasters and incorrect usage will also be excluded from warranty. Ta: Temperature measured at a position 2.5 cm (1 inch) away from the bulb wall Tb: Temperature on the bulb wall (cathode side) 2.5 cm (1inch) Ta Tb Construction Figure 6: External View and Electrode Construction APERTURE ANODE CATHODE BULB CERAMIC ELECTRODE (CENTER PIECE) CERAMIC ELECTRODE (REAR PIECE) LIGHT OUTPUTTLSOC0030EA Construction External view Terminology Discharging the L2D2 Lamps Figure 7: Example Circuit Diagram 300mA CONSTANT- CURRENT POWER SUPPLY (150 to 160 V dc) R T (5 kΩ) R (<3 kΩ) TRIGGER SWITCH TRIGGER POWER SUPPLY (500 to

600 V dc)

(>0.1 µF) ANODE DEUTERIUM LAMP CATHODE HEATER POWER SUPPLY TLSOC0019EB TLSOC0020EB

• Auxiliary electrode operation
• Conventional circuit 300mA CONSTANT- CURRENT POWER SUPPLY (150 to 160 V dc) RT (1 to5 kΩ) TRIGGER SWITCH CT (0.2 to 0.5 µF) ANODE DEUTERIUM LAMP CATHODE HEATER POWER SUPPLY In deuterium lamps, an aperture electrode is placed between cathode and anode to compress the discharge, so that high light intensity is obtained. This required, a high voltage trigger discharge across cathode and anode. In general, a typical power supply for deuterium lamps consists of the follow- ing three power supplies. G Constant current power supply of 300 mA (open voltage about 150 V) G Trigger power supply of 500 to 600 V peak G Power supply for the heater (about 10 W) However, in view of the need for cost reduction, safety and downsizing, lamp manufactures are evaluating methods that eliminate the trigger power sup- ply. One of these is the use of an auxiliary electrode. In this approach, the electrical energy from a constant current power supply of 150 V/300 mA (main power supply) is stored in a trigger capacitor and then is discharged between lamp shield box and cathode. This generates ions and momentarily reduces the impedance between anode and cathode, leading to the main dis- charge. However, because this trigger discharge occurs only at a restricted point near the cathode, it is a less reliable triggering method. In the L2D2 lamp, ceramic insulators are used as part of the electrode sup- port, so that the aperture potential is isolated from the shield box potential. Since this aperture electrode is used as an auxiliary electrode, the trigger dis- charge can be guided to the aperture, allowing operation at a voltage 40 to 50 V lower than that of a conventional lamp. This also results in higher reli- ability of the triggering operation. Thus, the greatest advantage of the auxili- ary electrode is that no trigger power supply is necessary. The circuit shown on the below, resulting both a cost reduction and downsizing of the power supply. When the L2D2 lamp series with an aperture size of 0.5 mm diameter will be operated by the circuit as shown above, it is recommended to employ CR constant as R T=1 kΩ and CT=0.5 µF to obtain the reliable lamp ignition. ELECTRODE BULB LEAD WIRE TECHNICAL INFORMATION

Calibrated Deuterium Light Source L7820 The L7820 is the calibrated light source consisting of L2D2 featur- ing high stability and good repeatability, which are required for cal- ibrated light source. In order for anybody to achieve stable light, not only the lamp design but also power supply and lamp housing design are optimized. It delivers high stable light in the long and the short term operation especially in the calibrated range of 250 nm to 400 nm. The L7820 is suitable for quality control of light source, light detec- tor and so on. The certificate with JCSS logo mark is attached. UV-VIS Fiber Light Source L7893 Series This light source L7893 series incorporates a highly stable L2D2 lamp and a Tungsten lamp into a single compact housing with an optical fiber light guide. The combination of these two lamps cov- ers a wide spectral range from 200 nm to 1100 nm, yet offers highly stable light output and long service life. This light source L7893 ser- ies is ideal for a compact analytical equipment such as miniature grating units, portable spectrophotometers and reflection meters. Lamp Housing E8039 This lamp housing was designed to allow easy operation of deuteri- um lamps such as L2D2 lamps and provide full lamp performance. It accommodates a lamp with a flange so that no optical alignment is required. The built-in interlock and forced-air cooling functions ensure high safety. Collimating lenses and fiber guide adaptors are also available as easy-to-replace options, which easily attach to the light exit and allow obtaining the desired light beam. For details, please refer to the catalogs which are available from our sales office. CE Marking This catalog contains products which are subject to CE Marking of European Union Directives. For further details, please consult Hamamatsu sales office. *PATENTS: USA 6, PATENTS PENDING: JAPAN 7, USA 1, EUROPE 7 *Information furnished by Hamamatsu is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2001 Hamamatsu Photonics K.K. TLSO1027E05 SEPT. 2002 IP (0106) Printed in Japan (500) L2D2 Lamps (Deuterium Lamps )

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Water-Cooled 150W VUV Deuterium Lamps These water-cooled 150W lamps provide a radiant output 3 to 4 times higher than 30W lamps and are chiefly used as excitation light sources. Two window materials, synthetic silica(L1314) and MgF 2(L1835) are available. The MgF 2 window type is widely used as a VUV light source in photo CVD, solar simulator(in space) and other VUV applications. A vacuum flange E3444 series are provided as an option allowing simple connection to a vacuum instrument. HAMAMATSU PHOTONICS K.K., Electron Tube Center 314-5, Shimokanzo, Toyooka-village, Iwata-gun, Shizuoka-ken, 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205 Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: info@hamamatsu.de United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road Welwyn Garden City Hertfordshire AL7 1BW, United Kingdom, Telephone: 44-(0)1707-294888, Fax: 44(0)1707-325777 E-mail: info@hamamatsu.co.uk North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171-41 SOLNA, Sweden, Telephone: (46)8-509-031-00, Fax: (46)8-509-031-01 E -mail: info@hamamatsu.se Italy: Hamamatsu Photonics Italia: S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)02-935 81 733, Fax: (39)02-935 81 741 E-mail: info@hamamatsu.it WEB SITE URL http://www.hamamatsu.com TLSOF0140 TLSXF0159 TLSXF0148